Chia Kai Lin, Bor‐Yann Chen, Jasmine U. Ting et al.

Journal of the Taiwan Institute of Chemical Engineers • 2023

Arnaud Kamdem Tamo, Ingo Doench, Gullit Deffo et al.

Journal of Materials Chemistry A • 2025

(Bio)sensors are integral to various aspects of daily life, contributing to safety, monitoring, and awareness.

Yuhe Cao, Mahdi Malmali, Xianghong Qian et al.

Journal of Water Process Engineering • 2022

Yen Dang, Aoife Power, Daniel Cozzolino et al.

Journal of Bio- and Tribo-Corrosion • 2022

Abstract Almost every abiotic surface of a material is readily colonised by bacteria, algae, and fungi, contributing to the degradation processes of materials. Both biocorrosion and microbially influenced corrosion (MIC) refer to the interaction of microbial cells and their metabolic products, such as exopolymeric substances (EPS), with an abiotic surface. Therefore, biofouling and biodeterioration of manufactured goods have economic and environmental ramifications for the user to tackle or remove the issue. While MIC is typically applied to metallic materials, newly developed and evolving materials frequently succumb to the effects of corrosion, resulting in a range of chemical reactions and transport mechanisms occurring in the material. Recent research on biocorrosion and biofouling of conventional and novel materials is discussed in this paper, showcasing the current knowledge regarding microbial and material interactions that contribute to biocorrosion and biofouling, including biofilms, anaerobic and aerobic environments, microbial assault, and the various roles microorganisms’ play. Additionally, we show the latest analytical techniques used to characterise and identify MIC on materials using a borescope, thermal imaging, Fourier transform infrared (FTIR), atomic force microscopy (AFM), scanning electron microscopy (SEM), X-ray photoelectron microscopy (XPS), X-ray diffraction (XRD), optical and epifluorescence microscopy, electrochemical impedance spectroscopy, and mass spectrometry, and chemometrics.

Manish Chauhan, Yashmeen Budania, Akshay Modi et al.

Carbon Neutralization • 2025

ABSTRACT This study delves into the innovative use of multiheteroatom‐doped vehicle exhaust soot as a catalyst for oxygen reduction reactions (ORR) and hydrogen/oxygen evolution reactions (OER/HER), presenting a transformative approach in energy materials. The synergistic effects of boron, nitrogen, oxygen, and sulfur (B, N, O, and S) heteroatom doping on vehicle exhaust carbon nanoparticles (CNPs) were explored thoroughly experimentally and through density functional theory (DFT) modeling, revealing the potential of these materials as tri‐purpose catalysts for converting pollutants into electrocatalysts. The B‐CNPs had the lowest overpotential (338 mV) at a current density of 10 mA/cm 2 , whereas the reaction kinetics of the B–N–S‐CNPs were superior, as they had the lowest Tafel slope (83.09 mV/dec). Furthermore, all the heteroatom‐doped CNPs perform better in terms of the OER than pristine CNPs, as they are in the range of 1.05–1.15 V (values are deducted from the theoretical potential of OER 1.23 V vs. RHE) at a current density of 10 mA/cm 2 . In the ORR, B–N–S‐CNPs had the highest limiting current density, onset potential, and half‐wave overpotential, which were 1.70 mA/cm 2 , 0.86, and 0.64 V, respectively. In addition to these experimental investigations, DFT simulations were used to calculate the binding energy (BE), interaction energy (IE/ E ads ), HOMO‐LUMO energy band gap, charge transfer (CT), noncovalent interaction (NCI) plot, and QTAIM molecular graphs of the CNPs and heteroatom‐doped CNPs and provided evocative outcomes as expected. This multifaceted approach integrates experimental and theoretical analyses, contributing to a comprehensive understanding of the catalytic potential of multiheteroatom‐doped soot.

G. Manasa, Chandra Sekhar Rout

Materials Advances • 2023

MXenes and their hybrid materials, with good physicochemical traits, have exhibited excellent performance across numerous applications.

Leonardo de Almeida Furtado, Mariana C. de O. Gonçalves, Carlos V. M. Inocêncio et al.

Journal of Analytical Methods in Chemistry • 2019

Caffeine is widely present in food and drinks, such as teas and coffees, being also part of some currently commercialized medicines, but despite its enhancement on several functions of human body, its exceeding use can promote many health problems. In order to develop new fast approaches for the caffeine sensing, graphite-epoxy composite electrodes (GECE) were used as substrate, being modified by different diazonium salts, synthetized as their tetraflouroborate salts. An analytical method for caffeine quantification was developed, using sware wave voltammetry (SWV) in Britton-Robinson buffer pH 2.0. Detection limits for bare electrode and 4-benzenesulfonic modified electrode were observed circa 145 µ mol·L -1 and 1.3 µ mol·L -1 , respectively. The results have shown that the modification shifts the oxidation peaks to lower potential. Kinetics of the reaction limited by diffusion was more expressive when caffeine was added to the solution, resulting in decreases of impedance, characterized by lower R ct . All results for caffeine determination were compared to a reference chromatographic procedure (HPLC), showing no statistical difference. Analytical parameters for validation were suitably determined according to local legislation, leading to a linear behaviour from 5 to 150 µ mol·L -1 ; precision of 4.09% was evaluated based on the RDC 166/17, and accuracy was evaluated in comparison with the reference method, with recovery of 98.37 ± 2.58%.

Carolina Gallego-Ramírez, Edwin Chica, Ainhoa Rubio-Clemente

Water • 2022

When dyes are discharged in water bodies, mutagenic, carcinogenic and teratogenic effects may be caused in both aquatic organisms and human beings. The use of biochar and the implementation of advanced oxidation processes (AOPs) are alternative treatments that have been used individually in the removal of dyes in wastewater. Besides being effective processes acting separately, biochar and AOPs can be coupled, exhibiting synergetic effects in the treatment of dyes contained in water. This work deals with the methods implemented to produce biochar from biomass, its mechanism in the removal of dyes and associated sustainability issues. Additionally, the main AOPs that have been utilized for the removal of dyes from water are covered, as well as the biochar-AOP combined processes. The future prospects for the removal of dyes from water have been also addressed. The coupling of biochar to AOPs has been proven to be more effective in the removal and mineralization of dyes than the individual treatments. In this regard and considering the scarce studies in the field, new horizons are opened on the treatment of water polluted with dyes.

He Xiu, Hao Lu, Jingjing Fu et al.

Frontiers in Microbiology • 2024

The iron transport system plays a crucial role in the extracellular electron transfer process of Shewanella sp . In this study, we fabricated a vertically oriented α-Fe 2 O 3 nanoarray on carbon cloth to enhance interfacial electron transfer in Shewanella putrefaciens CN32 microbial fuel cells. The incorporation of the α-Fe 2 O 3 nanoarray not only resulted in a slight increase in flavin content but also significantly enhanced biofilm loading, leading to an eight-fold higher maximum power density compared to plain carbon cloth. Through expression level analyses of electron transfer-related genes in the outer membrane and core genes in the iron transport system, we propose that the α-Fe 2 O 3 nanoarray can serve as an electron mediator, facilitating direct electron transfer between the bacteria and electrodes. This finding provides important insights into the potential application of iron-containing oxide electrodes in the design of microbial fuel cells and other bioelectrochemical systems, highlighting the role of α-Fe 2 O 3 in promoting direct electron transfer.

Ramu UshaRani, L. Rajendran, Marwan Abukhaled

Mathematical Modelling and Engineering Problems • 2021

A mathematical model of reaction-diffusion problem with Michaelis-Menten kinetics in catalyst particles of arbitrary shape is investigated. Analytical expressions of the concentration of substrates are derived as functions of the Thiele modulus, the modified Sherwood number, and the Michaelis constant. A Taylor series approach and the Akbari-Ganji's method are utilized to determine the substrate concentration and the effectiveness factor. The effects of the shape factor on the concentration profiles and the effectiveness factor are discussed. In addition to their simple implementations, the proposed analytical approaches are reliable and highly accurate, as it will be shown when compared with numerical simulations.

Rajni Garg, Priya Rani, Rishav Garg et al.

TURKISH JOURNAL OF CHEMISTRY • 2021

Nanomaterials have garnered the significant interest of scientists owing to their technological as well as medical applications. In particular, metal and metal oxide nanoparticles have gained prominence because of their enhanced performance as compared to their bulk counterparts. Metal-supported nanomaterials are anticipated to make major contributions to solving today's most challenging issues, like energy harvesting and environmental remediation. The incorporation of nanoparticles into sensors has significantly enhanced their precision and selectivity. With the advent of green chemistry, green synthetic techniques have been prioritized for the synthesis of single and multicomponent nanomaterials. In the current review, we have addressed the multidimensional applications of nanoparticles in various sectors, including surface coatings, biosensing, environmental remediation, energy devices, construction, and nano probing, etc. This study focuses on the categorization of nanomaterials according to their source, dimensions, and composition, along with the exploration of synthetic modes. The eco-friendly and cost-effective greener route for the synthesis of nanoparticles has been explored in detail. Further, the antibacterial and cytotoxic potential has been addressed, and toxicity analysis has been conducted. The study signifies the augmented potential of green synthesized nanoparticles that can prove as economically viable and eco-friendly alternatives to conventional materials.

Krishan Balachandran, Ryan Yow Zhong Yeo, Mimi Hani Abu Bakar et al.

International Journal of Hydrogen Energy • 2023

Microbial electrosynthesis (MES) have been proven effective at reducing carbon dioxide (CO 2 ) and synthesizing valuable organic commodities with the aid of electrical energy. The development of highly productive MES is challenging due to low bacterial loading, low electron transfer rate, and low solubility of CO 2 , which can decrease the production of relevant chemicals and further limit the future potential of upscaling. Many innovations have been established to upscale the system including the application of gas diffusion electrodes (GDEs) in a three-chambered MES system. To date, two types of commercially available GDEs have been employed in MES: polytetrafluoroethylene (PTFE) and carbon-based GDEs. The process of bacterial adhesion on the electrolyte-facing side of the GDE is influenced by material surface properties, such as surface charge, wettability , roughness, and area. Thus, a suitable material is required to modify the aforementioned GDE surfaces. Recently, researchers have been keen on modifying bio-electrodes with conducting polymers in microbial fuel cells and MES as they show fascinating outcomes. Moreover, modifying GDEs using conducting polymers (CPs) is well-established in fuel cells but highly lacking in MES. Several modification strategies can be adopted in MES, such as the microporous layer (MPL) coating, CP MPL, and CP-based MPL. Last, the present review features possible modifications of carbon-based GDE using CPs and its challenges. • Comparison of GDE and Non-GDE microbial electrosynthesis cell. • Application of PTFE-based and carbon based GDE in MES. • Factors affecting biofilm formation on electrolyte facing side of GDE. • Modification of electrolyte facing side GDE with conducting polymer.

Raynella M. Connatser, Matthew G. Frith, Jiheon Jun et al.

Biomass and Bioenergy • 2019

Supat Chupradit, M. Kavitha, Wanich Suksatan et al.

Advances in Materials Science and Engineering • 2022

Metal nanomaterials with special physicochemical and plasmatic properties have a wide range of applications in various fields including catalysts, plasmon devices, spectroscopy, fuel cell, and various sensors including chemical, colorimetric, and fluorescence sensors. These applications are made possible by controlling the morphology and properties of nanostructures and increasing their selectivity. Various methods have been developed for the synthesis of metal nanostructures, including the use of prefabricated patterns or hard templates such as anodic aluminum oxide and soft molds such as cetyltrimethylammonium bromide (CTAB).

Yaovi Holade, Sophie Tingry, Karine Servat et al.

Catalysts • 2017

The future of analytical devices, namely (bio)sensors, which are currently impacting our everyday life, relies on several metrics such as low cost, high sensitivity, good selectivity, rapid response, real-time monitoring, high-throughput, easy-to-make and easy-to-handle properties. Fortunately, they can be readily fulfilled by electrochemical methods. For decades, electrochemical sensors and biofuel cells operating in physiological conditions have concerned biomolecular science where enzymes act as biocatalysts. However, immobilizing them on a conducting substrate is tedious and the resulting bioelectrodes suffer from stability. In this contribution, we provide a comprehensive, authoritative, critical, and readable review of general interest that surveys interdisciplinary research involving materials science and (bio)electrocatalysis. Specifically, it recounts recent developments focused on the introduction of nanostructured metallic and carbon-based materials as robust “abiotic catalysts” or scaffolds in bioelectrochemistry to boost and increase the current and readout signals as well as the lifetime. Compared to biocatalysts, abiotic catalysts are in a better position to efficiently cope with fluctuations of temperature and pH since they possess high intrinsic thermal stability, exceptional chemical resistance and long-term stability, already highlighted in classical electrocatalysis. We also diagnosed their intrinsic bottlenecks and highlighted opportunities of unifying the materials science and bioelectrochemistry fields to design hybrid platforms with improved performance.

Kriti Shrivastava, Fateh Singh Gill, Sakshi Juyal et al.

Wiley Interdisciplinary Reviews Energy and Environment • 2025

ABSTRACT The rapidly growing population is continuously putting pressure on available resources and production processes, raising two significant global challenges viz. energy crisis and solid‐waste management. Both issues are responsible for the major challenge of global environmental deterioration. Different categories of solid waste, especially derived from agricultural and industrial waste, contribute to a large amount of global solid waste production which is not only contaminating the environment, but its improper management is a threat to flora and fauna, including human civilization. It is an essential goal of the circular economy to ensure sustainable development by designing the strategies for waste biomass conversion into functional carbon materials, an essential component of modern nanotechnology‐based energy applications. This review article highlights the current trends in different synthetic biomass to functional carbon conversion strategies. The application of biochar‐based carbon materials into modern high‐performance supercapacitors, rechargeable lithium‐ion batteries, and air batteries, serves as a catalyst to improve sorption kinetics of chemical solid‐state hydrogen storage and ORR/OER/HER electrocatalysts in several energy applications. Finally, the challenges regarding the actualization of biomass to hierarchical carbon technology are mentioned. These challenges should be addressed by researchers as well as policymakers to commercialize biomass‐derived functional carbon material for modern sustainable energy storage applications.

María L. Ramírez, Cecilia S. Tettamanti, Fabiana Gutiérrez et al.

Microchemical Journal • 2018

Fritz Scholz

Journal of Solid State Electrochemistry • 2023

Abstract In teaching electrochemistry, it is of primary importance to make students always aware of the relations between electrochemistry and all the non-electrochemical topics, which are taught. The vast majority of students will not specialise in electrochemistry, but they all can very much benefit from the basics and concepts of electrochemistry. This paper is aimed to give suggestions how the teaching of electrochemistry can easily be interrelated to topics of inorganic, organic, analytical, environmental chemistry, biochemistry and biotechnology.

Eduardo Henrique Rotta, Luciano Marder, V. Pérez‐Herranz et al.

Journal of Membrane Science • 2021

Giulia Ischia, Nicole D. Berge, Sunyoung Bae et al.

Agronomy • 2024

Hydrothermal carbonization (HTC) has emerged as a pivotal technology in the battle against climate change and fosters circular economies. Operating within a unique reaction environment characterized by water as a solvent and moderate temperatures at self-generated pressures, HTC efficiently converts biomass residues into valuable bio-based products. Despite HTC’s potential—from the management of challenging biomass wastes to the synthesis of advanced carbons and the implementation of biorefineries—it encounters hurdles transitioning from academic exploration to industrial implementation. Gaps persist, from a general comprehension of reaction intricacies to the difficulty of large-scale integration with wastewater treatments, to the management of process water, to the absence of standardized assessment techniques for HTC products. Addressing these challenges demands collaboration to bridge the many scientific sectors touched by HTC. Thus, this article reviews the current state of some hot topics considered crucial for HTC development: It emphasizes the role of HTC as a cornerstone for waste management and biorefineries, highlighting potentialities and challenges for its development. In particular, it surveys fundamental research aspects, delving into reaction pathways, predictive models, analytical techniques, and HTC modifications while exploring HTC’s crucial technological applications and challenges, with a peculiar focus on combined HTC, wastewater integration, and plant energy efficiency.

Utkarsh Chadha, Sanyukta Sinha, Jaidhitya Jonna et al.

ECS Journal of Solid State Science and Technology • 2022

Carbon nanotubes (CNTs) have been studied extensively utilizing the catalytic chemical vapor deposition (CCVD) process for several decades. CCVD is seen to have a better degree of control and scalability. CNTs have proved to be useful in single-molecule transistors, Scanning Electron Microscope (SEM) tips, gas and electrochemical storage, electron field emitting flat panel displays, and sensors. This paper summarizes various stabilizing agents such as cobalt ferrite and molybdenum disulphide that can increase the electrochemical activity of the Carbon Doped-Graphene Nanomaterials as Graphene doped with carbon shows a significant improvement in the properties in various aspects. We also investigated the electrochemical applications where CNTs are used as a prerequisite. Carbon nanotubes are seen in biosensors, energy storage, conductive plastics, and power fuel cells. Carbon nanomaterials’ influence on symmetrical and asymmetrical supercapacitors, carbon nanomaterials to power dye-synthesized solar cells, and the importance of CVD in the synthesis of carbon nanomaterials were also investigated.

Jianfeng Bao, Shuangshaung Guo, Dandan Fan et al.

Ultrasonics Sonochemistry • 2023

The world is currently facing a critical issue of water pollution, with wastewater being a major contributor. It comes from different types of pollutants, including industrial, medical, agricultural, and domestic. Effective treatment of wastewater requires efficient degradation of pollutants and carcinogens prior to discharge. Commonly used methods for wastewater treatment include filtration, adsorption, biodegradation, advanced oxidation processes, and Fenton oxidation, among others.The sonochemical effect refers to the decomposition, oxidation, reduction, and other reactions of pollutant molecules in wastewater upon ultrasound activation, achieving pollutants removal. Furthermore, the micro-flow effect generated by ultrasonic waves creates tiny bubbles and eddies. This significantly increases the contact area and exchange speed of pollutants and dissolved oxygen, thereby accelerating pollutant degradation. Currently, ultrasonic-assisted technology has emerged as a promising approach due to its strong oxidation ability, simple and cheap equipments, and minimal secondary pollution. However, the use of ultrasound in wastewater treatment has some limitations, such as high energy consumption, lengthy treatment time, limited water treatment capacity, stringent water quality requirements, and unstable treatment effects. To address these issues, the combination of enhanced ultrasound with nanotechnology is proposed and has shown great potential in wastewater treatment. Such a combination can greatly improve the efficiency of ultrasonic oxidation, resulting in an improved performance of wastewater purification. This article presents recent progress in the development of sonoactivated nanomaterials for enhanced wastewater disposal. Such nanomaterials are systematically classified and discussed. Potential challenges and future prospects of this emerging technology are also highlighted.

Ayodele Temidayo Odularu

Journal of Chemistry • 2020

This paper reports an overview of Green Chemistry and the concept of its twelve principles. This study focusses on the ninth principle of Green Chemistry, that is, catalysis. A report on catalysis, in line with its definition, background, classification, properties, and applications, is provided. The study also entails a green element called bismuth. Bismuth’s low toxicity and low cost have made researchers focus on its wide applications in catalysis. It exhibits smartness in all the catalytic activities with the highest catalytic performance among other metals.

Muzamil Jalil Ahmed, Shazia Perveen, Syed Ghazanfar Hussain et al.

Chemical Papers • 2022

Norshahirah M. Saidi, Muhammad Amirul Aizat Mohd Abdah, Muhammad Norhaffis Mustafa et al.

Battery energy • 2025

ABSTRACT Silicon (Si)‐based materials have emerged as promising alternatives to graphite anodes in lithium‐ion (Li‐ion) batteries due to their exceptionally high theoretical capacity. However, their practical deployment remains constrained by challenges such as significant volume changes during lithiation, poor electrical conductivity, and the instability of the solid electrolyte interphase (SEI). This review critically examines recent advancements in Si‐based nanostructures to enhance stability and electrochemical performance. Distinct from prior studies, it highlights the application of Si anodes in commercial domains, including electric vehicles, consumer electronics, and renewable energy storage systems, where prolonged cycle life and improved power density are crucial. Special emphasis is placed on emerging fabrication techniques, particularly scalable and cost‐effective methods such as electrospinning and sol–gel processes, which show promise for industrial adoption. By addressing both the technical innovations and economic considerations surrounding Si anodes, this review provides a comprehensive roadmap for overcoming existing barriers, paving the way for next‐generation, high‐performance batteries.

Tianwei He, Alain R. Puente Santiago, Shiyu Xia et al.

Advanced Energy Materials • 2022

Abstract The fundamental relationship between structure and properties, which is called “structure‐property”, plays a vital role in the rational designing of high‐performance catalysts for diverse electrocatalytic applications. Low‐dimensional (LD) nanomaterials, including 0D, 1D, 2D materials, combined with low‐nuclearity metal atoms, ranging from single atoms to subnanometer clusters, are currently emerging as rising star nanoarchitectures for heterogeneous catalysis due to their well‐defined active sites and unbeatable metal utilization efficiencies. In this work, a comprehensive experimental and theoretical review is provided on the recent development of single atom and atomic cluster‐decorated LD platforms towards some typical clean energy reactions, such as water‐splitting, nitrogen fixation, and carbon dioxide reduction reactions. The upmost attractive structural properties, advanced characterization techniques, and theoretical principles of these low‐nuclearity electrocatalysts as well as their applications in key electrochemical energy devices are also elegantly discussed.

Chi Him A. Tsang, Kwun Nam Hui, Kwan San Hui

Electrochimica Acta • 2017

Nima Ahmadi, Sajad Rezazadeh, Abdolrahman Dadvand et al.

Periodica Polytechnica Chemical Engineering • 2017

This study focuses on the effect of gas channels geometry on the performance of polymer electrolyte membrane fuel cell. A set of empirical tests are accomplished to study these effects. The cross section of the gas channel is changed from square to inverse trapezoid, that is, the bottom width of the channel is kept fixed at 1mm while the width of the top of the channel is increased with the discontinuity of 0.2mm from 1mm to 1.6mm. Results show that the best performance is obtained for the inverse trapezoid channel with the 1.2mm width in the top section of channel. Moreover to verify the experimental test results, a 3-D finite volume method in-house code is brought up to solve the conservation equations. Hereafter, the nozzle shape gas channel efficacy is investigated experimentally and the obtained results are verified by numerical results. The obtained results determine that, at an equable voltage, this new configuration of the channels enhances the current density output by cells as compared to the primary model (i.e., gas channel with square cross section area). This finding may be due to the increase of reactant velocity in the channel.

Mohamad Sahban Alnarabiji, Shik Chi Edman Tsang, Abdul Hanif Mahadi

Fuel • 2023

Andressa R. Pereira, Graziela C. Sedenho, João C. P. de Souza et al.

Anais da Academia Brasileira de Ciências • 2018

Bioelectrochemistry can be defined as a branch of Chemical Science concerned with electron-proton transfer and transport involving biomolecules, as well as electrode reactions of redox enzymes. The bioelectrochemical reactions and system have direct impact in biotechnological development, in medical devices designing, in the behavior of DNA-protein complexes, in green-energy and bioenergy concepts, and make it possible an understanding of metabolism of all living organisms (e.g. humans) where biomolecules are integral to health and proper functioning. In the last years, many researchers have dedicated itself to study different redox enzymes by using electrochemistry, aiming to understand their mechanisms and to develop promising bioanodes and biocathodes for biofuel cells as well as to develop biosensors and implantable bioelectronics devices. Inside this scope, this review try to introduce and contemplate some relevant topics for enzyme bioelectrochemistry, such as the immobilization of the enzymes at electrode surfaces, the electron transfer, the bioelectrocatalysis, and new techniques conjugated with electrochemistry vising understand the kinetics and thermodynamics of redox proteins. Furthermore, examples of recent approaches in designing biosensors and biofuel developed are presented.

Khumbolake Faith Ngulube, Amal Abdelhaleem, Ahmed I. Osman et al.

Environmental Science and Pollution Research • 2024

Herein, we explore the holistic integration of magnetite-based photocatalysts and techno-economic analysis (TEA) as a sustainable approach in wastewater treatment aligned with the Sustainable Development Goals (SDGs). While considerable attention has been devoted to photocatalytic dye degradation, the nexus between these processes and techno-economic considerations remains relatively unexplored. The review comprehensively examines the fundamental characteristics of magnetite-based photocatalysts, encompassing synthesis methods, composition, and unique properties. It investigates their efficacy in photocatalytic degradation, addressing homogeneous and heterogeneous aspects while discussing strategies to optimize photodegradation efficiency, including curbing electron-hole recombination and mitigating scavenging effects and interference by ions and humic acid. Moreover, the management aspects of magnetite-based photocatalysts are examined, focusing on their reusability and regeneration post-dye removal, along with the potential for reusing treated wastewater in relevant industrial applications. From a techno-economic perspective, the study evaluates the financial feasibility of deploying magnetite-based photocatalysts in wastewater treatment, correlating reduced pollution and the marketing of treated water with social, economic, and environmental objectives. By advocating the integration of magnetite-based photocatalysts and TEA, this paper contributes insights into scalable and profitable sustainable wastewater treatment practices. It underscores the alignment of these practices with SDGs, emphasizing a comprehensive and holistic approach to managing wastewater in ways that meet environmental, economic, and societal objectives.

Johannes G. Vos, Marc T. M. Koper

Journal of Electroanalytical Chemistry • 2019

Use of a rotating ring-disk electrode during gas-evolving reactions has been shown liable to errors under higher current densities, since product collection on the ring is vulnerable to the formation of gas bubbles at the disk-ring interspace. In this study, we explored methods of reducing such bubble-related errors and improving the reliability of the collection factor under high-intensity gas evolution. We attempted the mounting of a thin wire close to the surface, to dislodge bubbles that formed specifically on the interface between the disk and the disk-ring spacer. This approach was tested for the detection of chlorine during parallel chlorine and oxygen evolution, and resulted in a notable alteration of the collection efficiency; its value became lower than theoretical expectations and also quite stable, even under higher current densities. We also coated the RRDE tip in a hydrophilic polymer, to reduce the tendency of bubble formation; this was tested for the collection of hydrogen and oxygen gas, and led to a mild increase in overall performance. The coating allowed for approximately 50% higher hydrogen evolution current density without ring failure, and for oxygen collection led to an overall improvement in behaviour.

J. Zúñiga-Díaz, E. Reyes-Dorantes, Alfredo Quinto-Hernandez et al.

Journal of Chemistry • 2017

“Morelos rice” is a variety of rice with certificate of denomination of origin. It is a large grain of opaque appearance and extra large size that is grown exclusively in Morelos state (Mexico). Thus, the quality and characteristics of its rice bran may affect the kinetic of the extraction process of its oil as well as its stability. Therefore, this work is oriented to determine the extraction kinetics of its oil and its oxidative stability. The latter one is obtained through the proposal of a method based on open-circuit potential measurements. The results showed that the rice bran has 21.44% of raw oil, with a chemical composition (based on fatty acids) of 48.48% oleic acid, 35.26% linoleic acid, and 14.54% palmitic acid, as well as a free fatty acid content of 8.15%. A high percentage of its oil content can be recovered in a short time at room temperature, and its extraction kinetics is a function of both the washing and the diffusion of its oil. Under storage conditions the raw oil has a high stability, at least 8 months, and its oxidative stability was of 24, 9, and 7 hours at 50°C, 80°C, and 110°C, respectively.

Hannah Gunter, Chris Bradley, David M. Hannah et al.

Wiley Interdisciplinary Reviews Water • 2022

Abstract Improved monitoring of potable water is essential if we are to achieve the UN Sustainable Development Goals (SDGs), specifically SDG6: to make clean water and sanitation available to all. Typically monitoring of potable water requires laboratory analysis to detect indicators of fecal pollution, such as thermotolerant coliforms (TTCs), Escherichia coli ( E. coli ), or intestinal enterococci. However, these analyses are time‐consuming and expensive, and recent advances in field deployable sensing technology offer opportunities to investigate both the spatial and temporal dynamics of microbial pollution in a more resolved and cost‐effective manner, thus advancing process‐based understanding and practical application for human health. Fluorescence offers a realistic proxy for monitoring coliforms in freshwaters with potential for quantification of potable water contamination in near real‐time with no need for costly reagents. Here, we focus on E. coli to provide a state‐of‐the‐art review of potential technologies capable of delivering an effective real‐time E. coli sensor system. We synthesize recent research on the use of fluorescence spectroscopy to quantify microbial contamination and discuss a variety of approaches (and constraints) to relate the raw fluorescence signal to E. coli enumerations. Together, these offer an invaluable platform to monitor drinking water quality which is required in situations where the water treatment and distribution infrastructure is degraded, for example in less economically developed countries; and during disaster‐relief operations. Overall, our review suggests that the fluorescence of dissolved organic matter is the most viable current method—given recent advances in field‐deployable technology—and we highlight the potential for recent developments to enhance approaches to water quality monitoring. This article is categorized under: Engineering Water > Water, Health, and Sanitation Engineering Water > Methods Human Water > Methods

Hani Farhat, Joel Célier, Claude Forano et al.

Electrochimica Acta • 2021

Zezhou Yang, Ce Wang, Xiaofeng Lu

Science China Materials • 2018

Inocente Rodrı́guez-Iznaga, Marina G. Shelyapina, Vitalii Petranovskii

Minerals • 2022

Clinoptilolite is one of the most common, widespread and abundant zeolites in nature. Its availability, low cost, and outstanding ion exchange properties make clinoptilolite an excellent candidate for both direct use and various modifications to create new low-cost functional materials for sustainable development. Specific applications in which clinoptilolite is already being used include water treatment and heavy metal ion removal, agricultural purposes, storage and conversion of unwanted gaseous emissions into the atmosphere, production of catalysts and photocatalysts, bioactive materials, and a number of others. Unlike some other zeolites, clinoptilolite is difficult to synthesize, which is why most publications refer to this zeolite in its natural form, either directly from the deposit or after applying various processes to this mineral to improve its properties. Among the modification methods used, ion exchange stands out. This review is devoted to the study of ion exchange processes in natural clinoptilolite with two goals: first, as its strategic property for use in processes in which cation exchange is fundamentally necessary; second, as a way to modify it to create composite materials with predetermined desired properties.

Camila Gabriela de Souza, Daniela Medeiros Lobo de Andrade, Juliana Bahia Reis Jordão et al.

Oxidative Medicine and Cellular Longevity • 2017

Jabuticaba is an exotic fruit native to Brazil that has been arousing medicinal interest. Using chemical (HPLC-PDA, resonance mass spectra, and NMR), electroanalytical (differential pulse voltammetry, radical scavenging assay), and pharmacological ( in vivo and in vitro ) approaches, we have identified its bioactive compounds and hypotensive effects on hypertensive rats. The hydroalcoholic extract of jabuticaba (HEJ) presents a great quantity of phenolic compounds, and several molecules with hydroxyl groups present high efficiency as an antioxidant. The treatment with HEJ (100 and 300 mg/kg/day, for four weeks) presented hypotensive effects on L-NAME-induced hypertensive rats, possibly improving the nitric oxide bioavailability because of its high antioxidant potential. Furthermore, renal and cardiac hypertrophies were also attenuated after the HEJ treatment. Moreover, the vascular responses to contractile and dilating agonists were improved with the HEJ treatment, which is also able to induce nitric oxide production in endothelial cells.

Pilar Sánchez‐Peña, Jordi Ortuño Rodriguez, David Gabriel et al.

International Journal of Hydrogen Energy • 2022

Platinum is one of the most widely used catalysts in the cathode of Microbial Electrolysis Cells (MECs) to overcome the relatively slow kinetics of hydrogen evolution, even though it is not economically feasible on a large scale. This work aims at developing, applying, characterizing, and optimizing two novel Pt-functionalized inks with promising characteristics: [email protected] based on reduced graphene oxide and [email protected] based on a home-made material named Graphitene, which showed improved performance at a lower cost. The Pt-functionalized materials were deposited on carbon cloth and used as cathode electrode in a single chamber MEC. These materials provided 47% increase in Pt functionalization over commercial inks. Moreover, surface areas of 10.76 m2/g and 24.40 m2/g and electroactive areas of 0.10 cm2/cm2 and 0.16 cm2/cm2 were determined for [email protected] and [email protected], respectively, a difference caused by structural defects in the case of the [email protected], which slightly improved its performance compared to [email protected] Thus, the experimental results reached ca. 0.8 mA/cm2, a 43% higher intensity than that obtained using conventional commercial inks.

Oleksandr Matvieiev, Renáta Šelešovská, Marián Marton et al.

Scientific Reports • 2023

Abstract Screen-printed sensors with chemically deposited boron-doped diamond electrodes (BDDE) were modified with different types of gold nanoparticles (AuNPs) according to a new original procedure. Physically and electrochemically deposited AuNPs had various sizes and also nanoporous character. They also differ in shape and density of surface coverage. The developed sensors were characterized using scanning electron microscopy and Raman spectroscopy. Their electrochemical properties were studied using cyclic voltammetry and electrochemical impedance spectrometry of selected outer sphere ([Ru(NH 3 ) 6 ]Cl 3 ) and inner sphere (K 3 [Fe(CN) 6 ], dopamine) redox markers. The application possibilities of such novel screen-printed sensors with BDDE modified by AuNPs were verified in the analysis of the neurotransmitter dopamine. The best analytical performance was achieved using printed sensors modified with the smallest AuNPs. The achieved limit of detection values in nanomolar concentrations (2.5 nmol L −1 ) are much lower than those of unmodified electrodes, which confirms the significant catalytic effects of gold nanoparticles on the surface of the working electrode. Sensors with the best electrochemical properties were successfully applied in the analysis of a model solution and spiked urine samples.