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Photocatalytic bio-inspired PDA-RGO/g-C3N4 nanocomposite incorporated PES membrane for removal of environmental antibiotic pollutants

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Journal of chemical technology and Biotechnology 2024年第6期99卷 1401-1413页

作者： Govardhanan, B. GokulaKrishnan, S.A. Arthanareeswaran, G. Ashok, M. Chen, Yong-Song Taweepreda, W. Membrane Research Laboratory Department of Chemical Engineering National Institute of Technology Tiruchirappalli Tiruchirappalli India New Generation Materials lab Department of Physics National Institute of Technology Tiruchirappalli Tiruchirappalli India Department of Mechanical Engineering and Advanced Institute of Manufacturing with High-tech Innovations National Chung Cheng University Chiayi County Taiwan Polymer Science Program Division of Physical Science Faculty of Science Prince of Songkla University Hat-Yai Thailand

BACKGROUND: Membrane technology makes it more suitable for the treatment of environmental polluted organic wastewater. Membrane fouling is one of the major concerns in commercial membranes. To overcome this issue, photocatalytic nanomaterials are embedded into the membrane to enhance its surface nature and reusability. In this investigation, polydopamine functionalized graphene oxide (PDA-RGO), graphite carbon nitride (g-C3N4) and PDA-RGO/g-C3N4 nanomaterials were incorporated within polyethersulfone membrane fabricated via a phase inversion technique. These as-prepared membranes’ functional groups and surface morphologies were investigated by Fourier transform infrared (FTIR) spectroscopy, atomic force microscopy (AFM) and field emission electron microscopy (FESEM). These as-prepared membranes were investigated for photocatalytic activity under visible-light-driven photodegradation by environmental pollutants such as Rhodamine B (RhB) and Norfloxacin (NOR). RESULTS: Compared with pristine PES membrane, the PDA-RGO/g-C3N4-PES nanocomposite membrane showed higher photocatalytic activity for Rhodamine B 94.6% and Norfloxacin 96.8%, also reached greater water flux 189 L m−2 h−1. Therefore, the bio-inspired nanocomposite-modified PDA-RGO/g-C3N4 photocatalytic membrane could have huge potential in processing environmentally polluted water. CONCLUSIONS: PDA-RGO/g-C3N4-PES nanocomposite membrane improved the membrane hydrophilicity, water flow, anti-fouling performance, rejection studies and photocatalytic degradation than the pristine membrane. The synergistic result of PDA-RGO and g-C3N4 exhibits better photodegradation efficiency of the membrane towards environmental pollutants. © 2024 Society of chemical Industry (SCI). © 2024 Society of chemical Industry (SCI).

关键词： Nanocomposites

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Graphene-supported isolated platinum atoms and platinum dimers for CO2 hydrogenation: Catalytic activity and selectivity variations

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Chinese chemical Letters 2025年第4期36卷 271-275页

作者： Sanmei Wang Dengxin Yan Wenhua Zhang Liangbing Wang Research Institute of Interdisciplinary Sciences (RISE) and School of Materials Science & Engineering Dongguan University of Technology State Key Laboratory for Powder Metallurgy School of Materials Science and Engineering Central South University Hefei National Laboratory for Physical Sciences at the Microscale and Synergetic Innovation Centre of Quantum Information & Quantum Physics University of Science and Technology of China Laboratory for Chemical Technology Ghent University

Manipulating catalyst structures to control product selectivity while maintaining high activity presents a considerable challenge in CO2hydrogenation. Combining density functional theory calculations and microkinetic analysis, we proposed that graphene-supported isolated Pt atoms（Pt1/graphene） and Pt2dimers（Pt2/graphene） exhibited distinct selectivity in CO2hydrogenation. Pt1/graphene facilitated the conversion of CO2into formic acid, whereas Pt2/graphene favored methanol generation. The variation in product selectivity arose from the synergistic interaction of Pt2dimers, which facilitated the migration of H atoms between two Pt atoms and promoted the transformation from*COOH intermediates to*C（OH）2intermediates, altering the reaction pathways compared to isolated Pt atoms. Additionally, an analysis of the catalytic activities of three Pt1/graphene and three Pt2/graphene structures revealed that the turnover frequencies for formic acid generation on Pt1ii/graphene and methanol generation on Pt2i/graphene were as high as 744.48 h-1and 789.48 h-1, respectively. These values rivaled or even surpassed those previously reported in the literature under identical conditions. This study provides valuable insights into optimizing catalyst structures to achieve desired products in CO2hydrogenation.

关键词： CO2 hydrogenation DFT Graphene Pt single-atom Pt2 dimers

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Alloy strategy to synthesize Pt-early transition metal oxide interfacial catalysts

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Nano Research 2024年第4期17卷 3390-3397页

作者： Shi-Long Xu Hang Nan Wanqun Zhang Yue Lin Sheng-Qi Chu Hai-Wei Liang Hefei National Research Center for Physical Sciences at the Microscale Department of ChemistryUniversity of Science and Technology of ChinaHefei 230026China School of Materials and Chemical Engineering Anhui Jianzhu UniversityHefei 230601China Institute of High Energy Physics Chinese Academy of SciencesBeijing 100049China

Metal oxide supported metal catalysts show promising catalytic performance in many industry-relevant ***,the enhancement of performance is often limited by the insufficient metal/metal oxide *** this work,we demonstrate a general synthesis of Pt-early transition metal oxide(Pt-MO_(x),M=Ti,Zr,V,and Y)catalysts with rich interfacial sites,which is based on the air-induced surface segregation and oxidation of M in the supported Pt-M alloy *** characterizations verify the dynamic structural response of Pt-M alloy catalysts to air and the formation of Pt-MO_(x) catalysts with abundant interfacial *** prepared Pt-TiO_(x) interfacial catalysts exhibit improved performance in hydrogenation reactions of benzaldehyde,nitrobenzene,styrene,and furfural,as a result of the heterolytic dissociation of H_(2) at Pt-metal oxide interfacial sites.

关键词： Pt-early transition metal oxide interfacial catalyst alloy oxidation strategy interfacial sites hydrogenation reactions heterolytic dissociation

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Plasma-enabled synthesis of ordered PtFe alloy nanoparticles encapsulated with ultrathin N-doped carbon shells for efficient methanol electrooxidation

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Nano Research 2023年第2期16卷 2065-2075页

作者： Xuxu Sun Zhijian Mao Ruiqi Wang Xiaohu Pi Changle Chen Junbo Zhong Qi Wang Kostya(Ken)Ostrikov Institute of Plasma Physics Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China University of Science and Technology of China Hefei 230026China Rutgers Preparatory School New Jersey1345 Easton AveSomersetNJ 08873USA Institute of Intelligent Machines Hefei Institutes of Physical ScienceChinese Academy of SciencesHefei 230031China College of Chemical Engineering Sichuan University of Science and EngineeringZigong 643000China School of Chemistry and Physics and QUT Centre for Materials Science Queensland University of Technology(QUT)BrisbaneQLD 4000Australia

Methanol oxidation reaction(MOR),the key reaction for clean energy generation in fuel cells,is kinetically sluggish and short-lasting because of insufficient catalytic activity and stability of the common Pt-based *** Pt alloy structures which promise to surmount these issues,are challenging and impractical to fabricate using common high-temperature *** address the urgent need for simple and rapid synthesis methods for such alloys,here we report the versatile plasma-assisted thermal annealing synthesis of a robust electrocatalyst with PtFe alloys supported on N-doped carbon nanotubes(denoted as PtFe@NCNT-P).Benefiting from the reactive plasma-specific effects,the PtFe@NCNT-P electrocatalyst features ultrafine PtFe alloy nanoparticles(mean size~2.88 nm,ordered degree~87.07%)and ultrathin N-doped carbon(NC)shells(0.3–0.7 nm),leading to the excellent catalytic activity and stability toward *** catalyst shows the specific and mass activities of 3.99 mA/cm^(2)and 2,148.5 mA/mg,which are 7.82 and 7.41 times higher than those for commercial Pt/C(0.51 mA/cm^(2),290 mA/mg),and 2.18 and 2.59 times higher compared to the plasma-untreated PtFe@NCNT(1.83 mA/cm2,829.5 mA/mg),*** PtFe@NCNT-P further exhibits extraordinary stability during the long-term chronoamperometry test and 1,000-cycle cyclic voltammetry scanning,much better compared to PtFe@NCNT samples even after the longer thermal *** findings show great potential of the plasma-enabled synthesis of high-performance carbon-supported metallic electrocatalysts for the emerging clean energy technologies.

关键词： methanol oxidation reaction highly ordered PtFe alloy nanoparticles ultrathin N-doped carbon shell N-doped carbon support plasma nanotechnology

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Evidence for reduced periodic lattice distortion within the Sb-terminated surface layer of the kagome metal CsV3Sb5

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physical Review B 2025年第14期111卷 L140101-L140101页

作者： Felix Kurtz Gevin von Witte Lukas Jehn Alp Akbiyik Igor Vinograd Matthieu Le Tacon Amir A. Haghighirad Dong Chen Chandra Shekhar Max Planck Institute for Multidisciplinary Sciences 37077 Göttingen Germany 4th Physical Institute – Solids and Nanostructures University of Göttingen 37077 Göttingen Germany Institute for Biomedical Engineering University and ETH Zurich 8092 Zurich Switzerland Institute of Molecular Physical Science ETH Zurich 8093 Zurich Switzerland Institute for Quantum Materials and Technologies Karlsruhe Institute of Technology 76021 Karlsruhe Germany Max Planck Institute for Chemical Physics of Solids 01187 Dresden Germany

The discovery of the kagome metal CsV3Sb5 sparked broad interest, due to the coexistence of a charge density wave (CDW) phase and possible unconventional superconductivity in the material. In this Letter, we use low-energy electron diffraction (LEED) with a µm-sized electron beam to explore the periodic lattice distortion at the antimony-terminated surface in the CDW phase. We recorded high-quality backscattering diffraction patterns in ultrahigh vacuum from multiple cleaved samples. Unexpectedly, we did not find superstructure reflexes at intensity levels predicted from dynamical LEED calculations for the reported 2×2×2 bulk structure. Our results suggest that in CsV3Sb5 the periodic lattice distortion accompanying the CDW is less pronounced at Sb-terminated surfaces than in the bulk.

关键词： Charge density waves

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Long-lifespan thin Li anode achieved by dead Li rejuvenation and Li dendrite suppression for all-solid-state lithium batteries

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Chinese chemical Letters 2024年第10期35卷 530-536页

作者： Xuejie Gao Xinyang Chen Ming Jiang Hanyan Wu Wenfeng Ren Xiaofei Yang Runcang Sun Center for Lignocellulosic Chemistry and Biomaterials College of Light Industry and Chemical EngineeringDalian Polytechnic UniversityDalian 116034China Division of Energy Storage Dalian National Laboratoryfor Clean EnergyDalian Institute of Chemical PhysicsChinese Academy of SciencesDalian116023 China Institute of Physical Science and Information Technology Anhui UniversityHefei 230601China

Solid polymer electrolytes(SPEs)are considered to be one of the most promising systems applied in all-solid-state lithium metal batteries(ASSLMBs)on account of their chemical and electrochemical ro bustness,mechanical stability,cost-effective and scalable manufacturing ***,significant en deavors have been directed towards mitigating the formation of the Li dendrite in SPE-based ASSLMBs while research on the inactive lithium in the forms of the solid-electrolyte interface has been rarely re ***,a bi-functional GaI3additive is developed for in-situ generating Li_(3)Ga alloy for suppressing Li dendrite growth,as well as I3-in recovering dead *** on the density functional theory(DFT)results,the Li atom prefers to deposit on the Li_(3)Ga surface and then guide uniform Li deposi tion,while the I3species features a relatively lower lowest unoccupied molecular orbital(LUMO)energy level(-2.12 e V),meaning a higher electron affinity,which is beneficial for reviving inactive lithium to counterbalance the loss of *** a result,in comparison to cells employing pure PEGDME-based electrolytes,the Li-Li symmetric cells utilizing GaI3-containing solid-state electrolyte exhibited a cycling life nearly 30 times longer at a current density/capacity of 0.2 mA/cm^(2),0.2 mAh/cm^(2).The full batterie of LFP//1%GaI3-SPE//40μm Li delivered a noteworthy capacity retention of 82%after 1300 cycles at a rate of 1 C.

关键词： Synergistic effect In-situ Li Ga alloy Suppress Lidendrite Dead lithium regeneration All-solid-state lithium metal batteries

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Single-atom-mediated electron islands boost photocatalytic CO_(2)chemical fixation

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science China Chemistry 2024年第7期67卷 2292-2299页

作者： Shu Shang Lei Li Xin He Hui Wang Lirong Zheng Wei Shao Xiaodong Zhang Yi Xie Hefei National Research Center for Physical Sciences at the Microscale University of Science and Technology of ChinaHefei 230026China Institute of Energy Hefei Comprehensive National Science CenterHefei 230031China Beijing Synchrotron Radiation Facility Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China School of Chemistry and Chemical Engineering Hefei Normal UniversityHefei 230031China

Photocatalytic cycloadditions of CO_(2)with epoxides are emerging as a significant platform for the green synthesis of valuable carbonates,where efficient catalytic systems with spatially separated charge carriers are ***,a single p-block metal atom is proposed to be a candidate for photogenerated electron localization on a metal oxide *** taking the Bi single-atom supported on ZnO nanosheet(Bi1/ZnO)as an example,we show that the Bi atom plays the role of an electron island in the sea of delocalized holes within ***,the as-formed electron island could readily promote the rate-determining ring-opening process of cycloaddition *** from the unique spatially separated electrons and holes,the Bi1/ZnO achieves a high yield of cyclic carbonates with almost 100%*** study provides a pioneering strategy for enhancing the performances of photocatalytic CO_(2)chemical fixation.

关键词： electron islands CO_(2)photofixation photogenerated charge carriers

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Room-temperature third-order nonlinear Hall effect in Weyl semimetal TalrTe4

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National science Review 2022年第12期9卷 177-184页

作者： Cong Wang Rui-Chun Xiao Huiying Liu Zhaowei Zhang Shen Lai Chao Zhu Hongbing Cai Naizhou Wang Shengyao Chen Ya Deng Zheng Liu Shengyuan A.Yang Wei-Bo Gao College of Mathematics and Physics Beijing University of Chemical Technology Division of Physics and Applied Physics School of Physical and Mathematical Sciences Nanyang Technological University Institute of Physical Science and Information Technology Anhui University Research Laboratory for Quantum Materials Singapore University of Technology and Design School of Materials Science and Engineering Nanyang Technological University CAS Center for Excellence in Nanoscience National Center for Nanoscience and Technology The Photonics Institute and Centre for Disruptive Photonic Technologies Nanyang Technological University

The second-order nonlinear Hall effect observed in the time-revers al symmetric system has not only shown abundant physical content,but also exhibited potential application ***,a third-order nonlinear Hall effect has been observed in MoTe2and ***,few-layer MoTe2and WTe2are usually unstable in air and the observed third-order nonlinear Hall effect can be measured only at low temperature,which hinders further investigation as well as potential ***,exploring new air-stable material systems with a sizable third-order nonlinear Hall effect at room temperature is an urgent ***,in type-Ⅱ Weyl semimetal TaIrTe4,we observed a pronounced third-order nonlinear Hall effect,which can exist at room temperature and remain stable for *** third-order nonlinear Hall effect is connected to the Berry-connection polarizability tensor instead of the Berry *** possible me chanism of the observation of the third-order nonlinear Hall effe ct in TaIrTe4at room temperature has been *** findings will open an avenue towards exploring room-temperature nonlinear devices in new quantum materials.

关键词： topological material third-order nonlinear Hall effect room temperature Berry connection polarizability tensor

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Enhancing the Electrochemical Activity of 2D Materials Edges through Oriented Electric Fields

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ACS Nano 2024年第30期18卷 19828-19835页

作者： Wang, Hao Chen, Ding-Rui Lin, You-Chen Lin, Po-Han Chang, Jui-Teng Muthu, Jeyavelan Hofmann, Mario Hsieh, Ya-Ping Institute of Atomic and Molecular Sciences Academia Sinica Taipei10617 Taiwan Department of Physics National Taiwan University Taipei10617 Taiwan International Graduate Program of Molecular Science and Technology National Taiwan University Taipei10617 Taiwan Molecular Science and Technology Program Taiwan International Graduate Program Academia Sinica Taipei10617 Taiwan Department of Low Dimensional Systems J. Heyrovský Institute of Physical Chemistry Prague18200 Czech Republic

The edges of 2D materials have emerged as promising electrochemical catalyst systems, yet their performance still lags behind that of noble metals. Here, we demonstrate the potential of oriented electric fields (OEFs) to enhance the electrochemical activity of 2D materials edges. By atomically engineering the edge of a fluorographene/graphene/MoS2 heterojunction nanoribbon, strong and localized OEFs were realized as confirmed by simulations and spatially resolved spectroscopy. The observed fringing OEF results in an enhancement of the heterogeneous charge transfer rate between the edge and the electrolyte by 2 orders of magnitude according to impedance spectroscopy. Ab initio calculations indicate a field-induced decrease in the reactant adsorption energy as the origin of this improvement. We apply the OEF-enhanced edge reactivity to hydrogen evolution reactions (HER) and observe a significantly enhanced electrochemical performance, as evidenced by a 30% decrease in Tafel slope and a 3-fold enhanced turnover frequency. Our findings demonstrate the potential of OEFs for tailoring the catalytic properties of 2D material edges toward future complex reactions. © 2024 The Authors. Published by American chemical Society.

关键词： Electric fields

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Unconventional Designs for Functional Sodium-Sulfur Batteries

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Energy & Environmental Materials 2023年第4期6卷 405-415页

作者： Jiangfeng Ni Yichen Liu Sheng Zhu School of Physical Science and Technology Center for Energy Conversion Materials&Physics(CECMP)Jiangsu Key Laboratory of Thin FilmsSoochow UniversitySuzhou 215006China Institute of Molecular Science Key Laboratory of Chemical Biology and Molecular Engineering of Education MinistryShanxi UniversityTaiyuan 030006China

Sodium-sulfur(Na–S)batteries that utilize earth-abundant materials of Na and S have been one of the hottest topics in battery *** low cost and high energy density make them promising candidates for next-generation storage technologies as required in the grid and renewable *** recent years,extensive efforts have been devoted to the diversity and functionalities of Na–S batteries,aiming to extend their potential applications across multiple temporal and spatial ***,we summarize the unconventional designs for the functionalities of Na–S batteries such as flexible batteries,solid-state cells,flame resistance,and operation at extreme *** highlighting these design strategies that help to realize the functionalities,we hope this review offers a pathway to foster the bright future of Na–S batteries in diverse applications.

关键词： flexibility multiple functionalities sodium-sulfur batteries unconventional design

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