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ACS electrochemistry 2025年第2期1卷 239-248页

作者： Emily K Volk Arielle L Clauser Melissa E Kreider Diego D Soetrisno Sunilkumar Khandavalli Joshua D Sugar Stephanie Kwon Shaun M Alia Advanced Energy Systems Graduate Program Colorado School of Mines Golden Colorado 80401 United States. Sandia National Laboratories Livermore California 94550 United States. Chemistry and Nanoscience Center National Renewable Energy Laboratory Golden Colorado 80401 United States. Materials Science Center National Renewable Energy Laboratory Golden Colorado 80401 United States. Department of Chemical and Biological Engineering Colorado School of Mines Golden Colorado 80401 United States.

While anion exchange membrane water electrolyzers (AEMWEs) have achieved significant performance advances in recent decades, overpotentials remain high relative to their proton exchange membrane water electrolyzer (PEMWE) counterparts, requiring AEMWE-specific catalyst layer design strategies to further advance this technology. In this work, the role of the ionomer in catalyst layer structure and quality, catalyst layer stability, and ion conduction for supporting electrolyte-fed AEMWEs is assessed for catalyst layers composed of NiFeO and PiperION TP85 from Versogen at variable ionomer contents (0-30 wt %) for tests up to 200 h. The results reveal that, for supporting electrolyte-fed AEM devices, the ionomer is not required for ion conduction through the catalyst layer. Instead, the ionomer is found to play a critical role in catalyst layer structure and stability, where intermediate ionomer contents lead to the lowest overpotentials, highest effective surface areas, and lowest catalyst layer resistances. Catalyst layer stability is found to be a function of both catalyst adhesion and ionomer loss. These results show that an ionomer may be selected which is not of the same chemistry as the anion exchange membrane, mitigating ionomer stability concerns throughout the catalyst layer and offering a pathway towards highly active and stable AEMWEs.

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Recent development on polymer based light weight electromagnetic interference shielding materials

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Journal of materials science: materials in Electronics 2025年第14期36卷 1-36页

作者： Parvez, Mohammad Anwar Islam, Mobasserul Sultana, Salma Ali, Masdud Molla, Rakebul Hossain Hassan, Abul Theravalappil, Rajesh Hasnat, Mohammad A. Singha, Nayan Ranjan Rahaman, Mostafizur Department of Chemical Engineering College of Engineering King Faisal University Al-Ahsa Saudi Arabia Department of Manufacturing Engineering School of Mechanical Engineering Vellore Institute of Technology Tamilnadu Vellore 632014 India Department of Chemistry School of Advanced Science Vellore Institute of Technology Tamilnadu Vellore 632014 India Materials Research Laboratory ScienceTech Research Institute Malda 732216 India Department of Finance School of Business King Faisal University Al-Ahsa Saudi Arabia Interdisciplinary Research Center for Refining and Advanced Chemicals King Fahd University of Petroleum and Minerals Dhahran 31261 Saudi Arabia Electrochemistry & Catalysis Research Laboratory (ECRL) Department of Chemistry School of Physical Sciences Shahjalal University of Science and Technology Sylhet 3114 Bangladesh Advanced Polymer Laboratory Department of Polymer Science and Technology Government College of Engineering and Leather Technology (Post Graduate) Maulana Abul Kalam Azad University of Technology Salt Lake City West Bengal Kolkata 700106 India Department of Chemistry College of Science King Saud University P.O. Box 2455 Riyadh 11451 Saudi Arabia

The rapid advancement of modern electronic technologies has significantly enhanced social production efficiency, but it has also led to an increase in electromagnetic interference (EMI). As a result, electromagnetic shielding materials have gained considerable attention, particularly in the context of lightweight and highly integrated electronic devices. Polymers are widely utilized in EMI shielding applications due to their unique properties, such as light weight, high flexibility, and excellent corrosion resistance. This review focuses on well-studied polymer-based lightweight composites. The fundamental theory of EMI shielding is thoroughly introduced, and current testing methods for evaluating shielding effectiveness are summarized to assist in the development of design principles for effective shielding materials. Additionally, the impact of various carbon materials—classified into zero-dimensional, one-dimensional, two-dimensional, and three-dimensional forms—on shielding performance is discussed, along with their corresponding shielding mechanisms. These advanced lightweight materials with superior EMI shielding properties hold immense potential for applications across diverse sectors, including communications, electronics, aerospace, military, and environmental protection. © The Author(s), under exclusive licence to Springer science+Business Media, LLC, part of Springer Nature 2025.

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Advanced landfill leachate treatment: Sequential electrocoagulation and electrooxidation system for efficient remediation

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Journal of Water Process engineering 2025年 74卷

作者： Justen, Nicóli Borba, Fernando H. Mayer, Ildemar Seibert, Daiana Inticher, Jonas J. Ferreira Piazzi Fuhr, Ana C. Carissimi, Elvis Leichtweis, Jandira Postgraduate Program of Environment and Sustainable Technologies Federal University of Fronteira Sul Av. Jacob Reinaldo Haupenthal 1580 RS Cerro Largo 97900-000 Brazil Postgraduate Program of Chemical Engineering West Paraná State University Rua da Faculdade 645 Jd. Santa Maria PR Toledo 85903-000 Brazil Materials Science and Engineering Graduate Program Federal University of Pelotas 1 Gomes Carneiro St. RS Pelotas 96010-610 Brazil Department of Sanitation and Environmental Engineering Federal University of Santa Maria Av. Roraima 1000 RS Santa Maria 97105-000 Brazil

The treatment of concentrated landfill leachate generated by nanofiltration and reverse osmosis processes represents a significant challenge. This concentrate is characterized by high concentrations of heavy metals, contaminants of emerging concern, dissolved salts, and organic compounds. In this study, a novel advanced treatment system integrating an Electrocoagulation Reactor with a subsequent electrooxidation process was proposed. Two anode/cathode arrangements were evaluated: electrocoagulation followed by electrooxidation with “boron-doped diamond” and steel electrodes, and electrocoagulation followed by electrooxidation with “boron-doped diamond” and aluminum electrodes, focusing on their effectiveness in degrading contaminants and improving the quality of the treated concentrated landfill leachate. In order to monitor the efficiency of the electrocoagulation process and integrated systems, the degradation of the physicochemical parameters of absorbance at 254 nm, total organic carbon, and turbidity were investigated. Within the best performance, acute toxicity indices (Artemia salina - LC50) were determined and possible degradation and/or formation of contaminants of emerging concern were identified by gas chromatography–mass spectrometry (GC–MS). The results indicated the mineralization of 73 % of total organic carbon and 25 % of total nitrogen, an increase in the biodegradability fraction (BOD5/COD) of the concentrated landfill leachate from 0.18 to 0.35, as well as a significant reduction in toxicity (LC50 of 54.4 %), demonstrated by Artemia salina bioassays. The reduction in toxic potential was also observed in the by-product analysis by GC–MS, which indicated the removal of emerging contaminants such as benzene, 2-(2-methoxy-1-propenyl)-1,3,5-trimethylbenzene, benzothiazole, 2-(methylthio) and phenol, 2,2′-methylenebis[6-(1,1-dimethylethyl)-4-methyl-. These findings highlight that the integration of the electrocoagulation process with electrooxidation us

关键词： Concentrated landfill leachate Contaminants of emerging concern Electrocoagulation Electrooxidation

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Effect of Sn Doping on the Structural, Morphology and Magnetic Properties of CuO Nanoparticles Synthesized through a Simple Soft Chemical Route

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Semiconductors 2025年第5期59卷 413-426页

作者： Vasuhi, A. Dhanabalan, K. Dinesh, A. Ravichandran, A.T. Ayyar, Manikandan Suthakaran, S. Patil, R.P. Radhakrishnan, K. Mohanavel, V. Santhamoorthy, M. Santhoshkumar, S. Department of Physics Thanthai Periyar Government Arts and Science College (Autonomous) (Affiliated to Bharathidasan University) Tamil Nadu Thiruchirappalli 620023 India Post Graduate and Research Department of Physics J.J. College of Arts and Science (Autonomous) (Affiliated to Bharathidasan University) Tamil Nadu Pudukkottai 622422 India Department of Chemistry K. Ramakrishnan College of Engineering (Autonomous) Affiliated to the Anna University Samayapuram Tamil Nadu Trichy 621112 India Post Graduate and Research Department of Physics National College (Autonomous) Tamil Nadu Tiiruchirappalli 620001 India Department of Chemistry Centre for Material Chemistry Karpagam Academy of Higher Education Tamil Nadu Coimbatore 641021 India Department of Physics Karpagam Institute of Technology Tamil Nadu Coimbatore 641105 India Department of Chemistry M.H. Shinde Mahavidyalaya Kolhapur Tisangi MS 416206 India Centre for Materials Engineering and Regenerative Medicine Bharath Institute of Higher Education and Research Selaiyur Tamil Nadu Chennai 600073 India Centre of Research Impact and Outcome Chitkara University Institute of Engineering and Technology Chitkara University Punjab Rajpura 140401 India School of Chemical Engineering Yeungnam University Gyeongsan 38541 South Korea Department of Biochemistry Saveetha Medical College and Hospital Saveetha Institute of Medical and Technical Sciences Tamil Nadu Chennai India

Abstract: Semiconductor CuO nanoparticles (NPs) that were both undoped and Sn-doped were produced using a straightforward soft chemical process at a pH of 8 and annealed for 2 h at 600°C. The structural, optical, surface, and magnetic properties were examined using a variety of analytical methods. The predicted crystallite range of the NPs, which ranges from 39 to 26 nm, decreased with an increase in Sn-doping consideration. The synthesized particles are nanocrystalline, according to a Scanning electron microscope (SEM) investigation. The single-crystal individuality can be seen in the high-resolution transition electron microscope images. The functional frequencies are discovered by Fourier transform infrared spectra (FTIR) research, such as Cu–O (487, 609 cm–1) and Sn–O (949 cm–1). The energy bandgap values are calculated from the UV absorption and can range from 1.25 to 1.80 eV. The near-band-edge (NBE) peaks in the photoluminescence spectrum are shown to be about 431 cm–1. Magnetic studies revealed that when the Sn content is at its highest, the CuO NPs exhibit ferromagnetic behaviour. © Pleiades Publishing, Ltd. 2025.

关键词： chemical process CuO nanoparticles ferromagnetic semiconductor Sn-doped

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Hybridization between microstructure and magnetization improvement in lead and RE co-doped BiFeO_3

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Journal of Rare Earths 2016年第5期34卷 495-506页

作者： M.A.Ahmed S.F.Mansour S.I.El-Dek M.M.Karamany Materials Science Lab.(1) Physics Dept.Faculty of ScienceCairo University Physics Department Faculty of ScienceZagazig University Materials Science and Nanotechnology Dept. Faculty of Post Graduate Studies for Advanced SciencesBeni-Suef University Basic Science Dept. Faculty of EngineeringBritish University in Egypt

The crystal structure,magnetic and electrical properties of Bi（0.96）Pb（0.04） FeO3 and Bi（0.92）Pb（0.04）RE（0.04）FeO3（RE=La,Sm,Dy and Yb）polycrystalline samples were prepared by the flash autocombustion technique.X-ray diffraction（XRD）measurements show that the rare-earth doped compositions crystallized in rhombohedral symmetry of space group R3 *** undoped sample consisted needle shape particles while rare earth substitution preferred platelet like particles as clarified from high resolution transmission electron microscopy（HRTEM）.Morphological features were examined using field emission scanning electron microscopy（FESEM）.Magnetization measurements showed that Yb^3＋ samples possessed the highest room temperature saturation magnetization while when Bi^3＋ ions were substituted by La^3＋ ions,a smaller MS（0.28 emu/g）was *** coexistence of ferroelectric and magnetic transitions was detected using DSC and χM,indicating the multiferroic characteristics of Bi（0.92）Pb（0.04）RE（0.04）FeO3 *** Néel temperature shifted upwards with decreasing the ionic radius of rare earth *** correlation was established between microstructure,morphology and magnetic properties in view of the contribution of magnetocrystalline and shape anisotropy in the magnetic parameters values.

关键词： BiFeO3 multiferroic rare earths anisotropy dielectric conductivity Neel temperature

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Amplification of enzymatic and microbial fuel cells using organic electrochemical transistors

Device

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Device 2025年

作者： Saxena, Ravindra Zhang, Xu Cai, Rong Suggs, Olivia Bruggeman, Chase Hickey, David P. Ajo-Franklin, Caroline M. Verduzco, Rafael Applied Physics Graduate Program Smalley-Curl Institute Rice University Houston 77005 TX United States Department of Biosciences Rice University Houston 77005 TX United States Department of Chemical Engineering and Materials Science Michigan State University East Lansing 48824 MI United States Department of Bioengineering Rice University Houston 77005 TX United States Department of Chemical and Biomolecular Engineering Rice University Houston 77005 TX United States Rice Advanced Materials Institute Rice University Houston 77005 TX United States

Organic electrochemical transistors (OECTs) are thin-film devices operated in aqueous and biological environments for sensing chemicals and biomolecules. However, most sensor configurations involve introducing the target biomolecule directly in the OECT device. This has drawbacks because it may not be possible to have an electrolyte compatible with the target biomolecule or an environment optimal for the OECT. Here, we demonstrate a general and modular approach to building electrochemical sensors by coupling OECTs electronically with either an enzymatic fuel cell (EFC) or microbial fuel cell (MFC). We demonstrate that this modular approach can amplify currents by three orders of magnitude and enhance the signal-to-noise ratio. We also show that the power generated by the fuel cell can help tune the sensor's response for different applications. This work demonstrates a simple and versatile approach for amplifying currents from MFCs and EFCs useful for the development of bioelectronic sensors. © 2025 The Authors

关键词： amplification biosensors DTI-3: Develop electro-active bacteria enzymatic fuel cells microbial fuel cells organic electrochemical transistors power

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Valorization of Spondias bahiensis waste: Ultrasound-assisted extraction, in vitro phenolics bioaccessibility, and effect on the stability of lipid-protein oxidation in pre-cooked goat meatballs

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Food Bioscience 2025年 69卷

作者： da Silva Ferreira, Valquíria Cardoso de Santana Neto, Deocleciano Cassiano Fernandes Santos, Miriane Moreira da Silva, Anna Júllia Bezerra de Azevedo Moura, Gleyce Swellen Santos Ribeiro, José Evangelista Lima, Marcos dos Santos Magnani, Marciane Silva, Fábio Anderson Pereira da Department of Management and Agro-industrial Technology Federal University of Paraíba Paraíba Bananeiras Brazil Post-graduate Program in Food Engineering Department of Chemical Engineering Federal University of Paraná Brazil Post-graduate Program in Food Science and Technology Department of Food Engineering Technology Center Federal University of Paraíba Paraíba Joao Pessoa 58051-900 Brazil Department of Food Engineering Technology Center Federal University of Paraíba Paraíba Joao Pessoa 58051-900 Brazil

This study aimed to optimize the ultrasound-assisted extraction of phenolic compounds from the bagasse of umbu-cajá (Spondias bahiensis), a native Brazilian fruit, and to assess their bioaccessibility. Additionally, the influence of different concentrations of the umbu-cajá bagasse (SBB) extract on the oxidative stability of pre-cooked goat meatballs was investigated over a 10-day refrigerated storage period by quantifying lipid oxidation products. A central composite rotational design determined the optimal ethanol concentration, sonication time, and bagasse-solvent ratio. The optimized extract was applied to meatballs at two concentrations: EX2 (meatballs with 7.0 g/100 g of added SBB extract) and EX4 (meatballs with 13.7 g/100 g of added SBB extract). A control treatment (no antioxidant) and BHT-treated meatballs (0.02 g/100 g) were included as references. Meatballs were evaluated by measuring instrumental color, peroxide value, TBARS, carbonyl compounds, and through simulated digestion. Optimal extraction conditions were 55 % ethanol, 20 min of sonication, and a 1:36.8 bagasse-to-solvent ratio (m/v). The extract showed high antioxidant activity and bioaccessibility of catechin (1243.75 %), epicatechin gallate (918.75 %), procyanidins B2 (915.38 %), gallic acid (319.76 %) and procyanidins B1 (136.36 %). SBB extract slowed lipid oxidation until day 10 and protein oxidation until day 5 but did not inhibit color change. The meatballs had low content of oxidative compounds and high antioxidant capacity in the intestinal fraction, indicating that SBB extract can partially or totally replace the synthetic preservative. © 2025

关键词： Antioxidant Goat meat In vitro gastrointestinal digestion Oxidation Phenolic compounds Umbu-cajá

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Boosting overall water splitting by incorporating sulfur into NiFe(oxy)hydroxide

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Journal of Energy Chemistry 2022年第1期31卷 364-371,I0010页

作者： Chiho Kim Seong Hyun Kim Seunghun Lee Ilyeong Kwon Seong Hyun Kim Shinho kim Changgyu Seok Yoo Sei Park Yangdo Kim Department of Materials Science and Engineering Pusan National UniversityBusan 46241Republic of Korea BK21 Four Innovative Graduate Education Program for Global High-tech Materials&PartsPusan National UniversityBusan 46241Republic of Korea Department of Materials Science and Engineering Pohang University of Science and Technology(POSTECH).Pohang 37673Republic of Korea

Developing highly active and cost-effective electrocatalysts for enhancing the hydrogen evolution reaction(HER)and oxygen evolution reaction(OER)is a significant challenge for overall water ***-incorporated nickel iron(oxy)hydroxide(S-NiFeOOH)nanosheets were directly grown on commercial nickel foam using a galvanic corrosion method and a hydrothermal *** incorporation of sulfur into NiFeOOH enhanced the catalytic activity for the HER and OER in 1 M KOH *** enhanced catalytic activity is attributed to the change in the local structure and chemical states due to the incorporation of *** performance for overall water splitting was achieved with an alkaline water *** was realized by employing S-NiFeOOH as a bifunctional electrocatalyst,thereby outperforming a water electrolyzer that requires the usage of precious metal electrocatalysts(i.e.,Pt/C as the HER electrocatalyst and IrO_(2) as the OER electrocatalyst).Moreover,when driven by a commercial silicon solar cell,an alkaline water electrolyzer that uses S-NiFeOOH as a bifunctional electrocatalyst generated hydrogen under natural *** study shows that S-NiFeOOH is a promising candidate for a large-scale industrial implementation of hydrogen production for overall water splitting because of its low cost,high activity,and *** addition,the solar-driven water electrolyzer using S-NiFeOOH as a bifunctional electrocatalyst affords the opportunity for developing effective and feasible solar power systems in the future.

关键词： Overall water splitting Hydrogen production Sulfur incorporated NiFe(oxy)hydroxide Electrocatalysts Solar-driven water splitting

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Improving the Performance of Asphalt Mixtures with Highly Acidic Aggregates in Central Vietnam Using Modifier Based on Styrene-Butadiene-Styrene and Rosin Resin

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Journal of materials in Civil engineering 2025年第7期37卷

作者： Nguyen, Lan Ngoc Lee, Hosin David Bui, Lam Tung Kim, Young-Ik Truong, Van Quyet Nguyen, May Huu Nguyen, Du Van Dept. of Construction Materials Faculty of Construction Engineering Univ. of Transport and Communications No. 03 Cau Giay Hanoi100000 Viet Nam Dept. of Civil and Environmental Engineering Iowa Technology Institute The Univ. of Iowa Iowa CityIA52242 United States Research Dept. Hansoo Natech Co. Ltd. 6-20 Yuseong-daero 1205beon-gil Yuseong-gu Daejeon34104 Korea Republic of Civil and Environmental Engineering Program Graduate School of Advanced Science and Engineering Hiroshima Univ. 1-4-1 Kagamiyama Higashi-Hiroshima Hiroshima739-8527 Japan Faculty of Civil Engineering Univ. of Transport and Communications Campus in Ho Chi Minh City Ho Chi Minh City700000 Viet Nam

In Central Vietnam, the aggregate typically originates from highly acidic rocks containing a significant amount of silicon dioxide (SiO2), leading to poor adhesion quality with virgin asphalt binder. Hence, the asphalt mixture production usually needs to utilize adhesion promoters. Based on the chemical compositions of the sample aggregate (up to 72.3% SiO2), research has been conducted to introduce an adhesive agent called rubber modified compound (RMC-160), which is composed of styrene-butadiene-styrene (SBS) with petroleum hydrocarbon resin, treated clay and mineral oil. This article presents the research findings regarding the adhesion effectiveness of RMC-160-modified asphalt binder to high acid-based aggregate through laboratory and field tests, along with the mixture performance under both short-term oven aging (STOA) and long-term oven aging (LTOA). The test results exhibited remarkable effects, whereby the asphalt binder modified with RMC-160 additive significantly increased the adhesion level from Grade 2 to Grade 4, and the asphalt mixtures containing RMC-160 had lower rutting and higher cracking tolerance (CTIndex) under both the STOA and LTOA conditions. © 2025 American Society of Civil Engineers.

关键词： Silicon oxides

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Kinetics and mechanism of growth of β-solid solution during reaction diffusion in binary titanium and zirconium alloy systems

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Defect and Diffusion Forum 2008年 279卷 117-124页

作者： Tiwari, G.P. Taguchi, O. Iijima, Y. Kale, G.B. Post Irradiation Examination Division Bhabha Atomic Research Centre Mumbai India Materials Science and Engineering Miyagi National College of Technology Natori 981-1239 Japan Dept. of Materials Science Graduate School of Engineering Iwate Univ. Japan Materials Science Division Bhabha Atomic Research Centre Mumbai India

High temperature beta-phase in titanium and zirconium alloy systems decomposes through an eutectoid reaction into a Ti- and Zr-rich α-solid solution and an intermetallic compound. The present paper reports the layer growth kinetics of the β-solid solution phase in elemental diffusion couples of titanium and zirconium. The growth kinetics obeys a parabolic growth law. However, the temperature dependence of the growth rate constant shows a bimodal behavior. The Arrhenius plot of the growth rate constant, which is linear at the start, becomes curved at lower temperature ranges. The deviation from the Arrhenius plot of the growth rate constant is related to the curvature in the solvus line of the β-solid solution. A theoretical model for the reaction diffusion responsible for the growth of β-solid solution is presented. The growth rate of β-phase is described by the equation k 2 = Wβ2/t = Dβ.ΔC. ξ, where k is a growth rate constant and Wβ is the thickness of the β-phase formed over a period of time t, Dβ is the interdiffusion coefficient for the β-phase, ΔC is concentration range of β-phase and ξ is a parameter which is a function of the miscibility gaps in the phase diagram on the either side of the ß-phase. The above equation provides a satisfactory description of the various aspect of the phenomenon of the growth of β-phase in Ti-and Zr-alloy systems.

关键词： Temperature distribution

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