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Light-driven directional ion transport for enhanced osmotic energy harvesting

National Science Review 2021年第8期8卷 178-185页

作者： Kai Xiao Paolo Giusto Fengxiang Chen Ruotian Chen Tobias Heil Shaowen Cao Lu Chen Fengtao Fan Lei Jiang Max Planck Institute of Colloids and Interfaces Department of Colloid Chemistry Key Laboratory of Bio-inspired Smart Interfacial Science and Technology of Ministry of Education School of ChemistryBeihang University State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University State Key Laboratory of Catalysis 2011-iChEMDalian National Laboratory for Clean Energy (DNL)Dalian Institute of Chemical Physics(DICP)Chinese Academy of Sciences State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology

Light-driven ion（proton） transport is a crucial process both for photosynthesis of green plants and solar energy harvesting of some archaea. Here, we describe use of a TiO2/C3N4semiconductor heterojunction nanotube membrane to realize similar light-driven directional ion transport performance to that of biological systems. This heterojunction system can be fabricated by two simple deposition steps. Under unilateral illumination, the TiO2/C3N4heterojunction nanotube membrane can generate a photocurrent of about 9 μA/cm2, corresponding to a pumping stream of ～5500 ions per second per nanotube. By changing the position of TiO2and C3N4, a reverse equivalent ionic current can also be realized. Directional transport of photogenerated electrons and holes results in a transmembrane potential, which is the basis of the light-driven ion transport phenomenon. As a proof of concept, we also show that this system can be used for enhanced osmotic energy generation. The artificial light-driven ion transport system proposed here offers a further step forward on the roadmap for development of ionic photoelectric conversion and integration into other applications, for example water desalination.

关键词： ion pump ion transport nanofluidic porous membrane carbon nitride

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Composition Modulation of Hematite Photoanode for Highly Efficient Photoelectrochemical Water Oxidation

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SSRN 2023年

作者： Liu, Xueqin Wang, Jingnan Lin, Kaijie Cao, Yu Ran, Jianhua Chen, Yihuang Li, Yingzhe Hu, Xiaoqin Faculty of Materials Science and Chemistry China University of Geosciences Wuhan430074 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing & Finishing Wuhan Textile University Wuhan430200 China State Key Laboratory of Geological Processes and Mineral Resources China University of Geosciences Wuhan430074 China College of Chemistry and Materials Engineering Wenzhou University Wenzhou325035 China

Hematite (α-Fe2O3) has emerged as a promising candidate for photoelectrochemical (PEC) water oxidation. Modulating its composition is pivotal for obtaining highly efficient PEC performance. However, an oxygen-rich surface is formed from the FeOOH precursor, resulting in poor surface charge transfer. In this work, for the first time, Fe nanoparticles were deposited on the surface of α-Fe2O3 to reduce the surface oxygen content. Subsequently, the oxygen vacancy (Vo) and hydrogen (H) impurity defects were introduced to further control the chemical composition of Fe2O3. The introduction of Vo can increase the charge carrier density, while the charge transport mobility is reduced due to the low hopping process of small polarons induced by Vo. To address the problem, we show that a shallow-level defects are created via H doping, which extracts the trapped electrons out of the Vo-induced trap states. Due to the formation of homogeneous distribution of Fe and O, introduction of Vo and the incorporation of shallow-level defects by H impurity, charge separation efficiency were markedly improved. Consequently, the photocurrent density of α-Fe2O3 photoanode was increased from 0.76 to 1.71 mA cm-2 at the potential of 1.23 V versus the reversible hydrogen electrode. Our work verifies the relationship between the PEC performance of semiconductor photoanode and its composition and provides promising opportunities for further optimization. © 2023, The Authors. All rights reserved.

关键词： Charge transfer

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Designing Magnetic Semiconductors From a Ferromagnetic Metallic Glass

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FRONTIERS IN materials 2022年 9卷

作者： Wang, Xinchao Li, Xuan Chen, Na Zhang, Tao Key Laboratory of Aerospace Materials and Performance (Ministry of Education) School of Materials Science and Engineering Beihang University Beijing China No 18th Research Institute China Electronics Technology Group Corporation Tianjin China Key Laboratory for Advanced Materials Processing Technology (MOE) The State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and Engineering Tsinghua University Beijing China Center for Advanced Analysis and Computational Science Zhengzhou University Zhengzhou China

Utilizing both charge and spin degrees of freedom of electrons simultaneously in magnetic semiconductors promises new device concepts by creating an opportunity to realize data processing, transportation and storage in one single spintronic device. Unlike most of the traditional diluted magnetic semiconductors, which obtain intrinsic ferromagnetism by adding magnetic elements to non-magnetic semiconductors, we attempt to develop new magnetic semiconductors via a metal-semiconductor transition by introducing oxygen into a ferromagnetic Co-Fe-B metallic glass. The atomic structure and electronic structure of the Co-Fe-B-O sample are explored by using first-principles calculations. The total pair correlation functions of both the Co-Fe-B and Co-Fe-B-O samples evidence their glass structures. The bond pair and coordination number analysis together demonstrate that the oxygen addition enables the bond types to change from the dominant metallic bonding in the Co-Fe-B metallic glass to the mixture of metallic, ionic and covalent bonding in the Co-Fe-B-O oxide glass. This results in the localization of electron charge density and the opening of the band gap in the Co-Fe-B-O oxide glass. The density of states suggests the Co-Fe-B-O oxide glass is semiconducting with a band gap of about 1.7 eV, but there are intermediate energy levels in the band gap. Meanwhile, the Co-Fe-B-O oxide glass remains to be ferromagnetic. These results indicate that the Co-Fe-B-O oxide glass is a magnetic semiconductor transferred from a ferromagnetic Co-Fe-B metallic glass, which is further verified by the experimental realization of a Co-Fe-B-O magnetic semiconductor. Furthermore, our calculation results reveal that a hybridization of the 4s/4p, 3d electrons of ferromagnetic Co and Fe atoms and O 2p electrons exists. Such s, p-d exchange interaction is essential to bridge the mutual interaction between the electrical conduction arising from s-like electrons and ferromagnetism supported by 3d elec

关键词： Co-Fe-B-O oxide glass magnetic semiconductor ferromagnetism electronic structures first-principles

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Scalable 3d textile with Hierarchically Functionalized Pyramidal Units Using Nanostructured Polyamide@Carbon/Fe3o4 Fibers for Tunable Microwave Absorption

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SSRN 2023年

作者： Deng, Xiuyan Gao, Shuang Qi, Xiaoming Dai, Hongbo Fu, Shaoyun Ni, Qingqing Fu, Yaqin Institute of Composite Materials Zhejiang Sci-Tech University Zhejiang Hangzhou310018 China Zhejiang Provincial Innovation Center of Advanced Textile Technology Zhejiang Shaoxing312030 China College of Aerospace Engineering State Key Laboratory of Power Transmission Equipment and System Security and New Technology Chongqing University Chongqing400044 China Key Laboratory of Advanced Textile Materials and Manufacturing Technology China

Most of the existing flexible microwave absorbing materials (MAMs) are in forms of nonwoven or woven composites. However, the nonwoven ones always show the poor mechanical properties and the woven ones normally involve with the complex fabrication processes and present heavy weight (>1.0 g/cm3), large thickness (>4.0 mm), and impermeability, which greatly hinder their wearable applications. Herein, a scalable 3D textile with hierarchically functionalized pyramidal units using the polyamide@carbon/Fe3O4 fibers was successfully fabricated via a simple combined process of melt-spinning and three-dimensional (3D) weaving technologies. The core-sheath polyamide@carbon/Fe3O4 fibers can be continuously fabricated with a high production rate of 6000 m/min using pristine polyamide as core and the modified polyamide doped with carbon black and Fe3O4 nanoparticles as sheath. As a result, the as-prepared polyamide@carbon/Fe3O4 fibers are easily woven into various 3D textiles with pyramid periodic and impedance matching-lossy-dielectric multilayer structures, simultaneously achieving the impedance gradient and destructive interference. More importantly, changing the size of pyramid structures can tailor the microwave absorption performance. Consequently, the high-density polyamide@carbon/Fe3O4 textile has high-efficiency microwave absorption ability, showing lightweight (0.3 g/cm3), small-thickness (3.2 mm), strong (-47.51 dB), and broadband (5.2 GHz). Besides, the 3D structures endowed the textile with excellent mechanical property, superior flexibility, outstanding breathability and good heat insulation property, which is better than similar MAMs. This work provides a promising strategy for facile and large-scalable production of microwave absorption textiles with high overall performance. © 2023, The Authors. All rights reserved.

关键词： Magnetite

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Low viscosity epoxy structural adhesive cured at room temperature for crack repair of subway tunnel 2

Low viscosity epoxy structural adhesive cured at room temper...

引用

2021 2nd International Conference on Mechanical Engineering and materials, ICMEM 2021

作者： Xiao, Ming Sun, Xiaojiang Rong, Huaqing Bi, Shuguang Tang, Jiagong Luo, Xianmeng Ran, Jianhua Hubei Key Laboratory of Biomass Fibers and Eco-Dyeing and Finishing State Key Laboratory of New Textile Materials and Advanced Processing Technologies College of Chemistry and Chemical Engineering Wuhan Textile University Wuhan430200 China Hubei DaTangAnSheng Construction Engineering Co. Ltd Wuhan430050 China

Epoxy structural adhesive has good mechanical properties, especially high adhesion, low shrinkage rate, and high stability, widely used in steel plate reinforcement, crack repair, bridge splicing, and concrete bonding, etc. However, due to the high cross-linking density and high internal stress after curing, its shortcomings, such as brittleness, the poor performance of fatigue resistance and heat resistance, limit its application in special track engineering. In this work, two kinds of epoxy structural adhesives (EPA-1, EPA-2) with low viscosity and room temperature curing were synthesized by selecting different bisphenol A epoxy resin and active diluent as component A and modified amine curing agent as component B. The results showed that EPA-1 and EPA-2 presented significant toughness compared with the classic construction adhesive (AralditeXH160). The yield strengths of EPA-1 and EPA-2 were 4.88 MPa and 13.13 MPa, and the shear strengths were 11.93 MPa and 13.08 MPa, respectively, showing good adhesive properties. In addition, the viscosities of EPA-1 and EPA-2 were 127 mPa·s and 308 mPa·s, respectively, and their decomposition temperatures were all above ~280 ℃, which indicated that the self-made epoxy structural adhesives could be used for the repair of cracks in the vibration subway tunnel. © 2021 Institute of Physics Publishing. All rights reserved.

关键词： Heat resistance

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High-entropy compounds for water electrolysis: insights into dynamic reconstruction behavior and its impact on oxygen evolution reaction catalysis

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Journal of Energy Chemistry 2025年 108卷 307-316页

作者： Ye, Beirong Liu, Hongxian Li, Chen Zhang, Tengfei Li, Yongqi Liang, Xinqi Chen, Renhong Tang, Tao Huang, Fengyu Li, Sipu Zhang, Lingjie Noori, Abolhassan Mousavi, Mir F. Xia, Xinhui Zhang, Yongqi Institute of Fundamental and Frontier Sciences University of Electronic Science and Technology of China Sichuan Chengdu611731 China University of Electronic Science and Technology of China Zhejiang Huzhou313002 China School of Physics and Electronic Science Zunyi Normal University Guizhou Zunyi563006 China School of Electrical Engineering University of South China Hunan Hengyang421001 China State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Zhejiang Hangzhou310027 China Department of Chemistry Faculty of Basic Sciences Tarbiat Modares University Tehran14117-13116 Iraq College of Materials Science & Engineering Zhejiang University of Technology Zhejiang Hangzhou310014 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Hubei Wuhan430200 China

Component leaching plays a pivotal role in enhancing the activity and stability of high-entropy-based catalysts by triggering structural reconstruction during the oxygen evolution reaction (OER). In this study, we employed soluble V and Mo as sacrificial components alongside a Co stabilizer to synthesize NiFeCoVMo high-entropy catalysts, aiming to simultaneously modulate the reconstruction behavior and optimize catalytic performance. The synergistic interplay between dual-component dissolution and in situ deposition/adsorption mechanisms accelerates structural evolution, ultimately yielding MoO42−-modified NiFeCo oxyhydroxide (NiFeCoOOH-MoO42−). Mechanistic studies reveal that the NiFeCo-based system is particularly conducive to the reconstruction process, while adsorbed MoO42− function as electronic modulators that redistribute charge densities within the reconstructed layers and reduce surface energy. As a result, this reconstructed catalyst demonstrates exceptional OER activity, achieving an overpotential of 172 mV at 10 mA cm−2, along with remarkable long-term durability (up to 500 h at 50 mA cm−2). This study provides fundamental insights into the origins of the superior electrocatalytic performance of high-entropy materials, paving the way for further exploration and optimization of these advanced catalysts. © 2025

关键词： Light modulators

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Enhanced Flexoelectric and Piezoelectric Pairing of Bent Pvdf Membrane with 2d Sns2-Biocl Heterojunction

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SSRN 2024年

作者： Li, Wen-Ming Zhang, Hui Dai, Chen-Min Miao, Jiao-Jiao Zhang, Peng-Fei Fan, Wei Song, Qing-Wen Chen, Pei Xia, Liang-Jun Xu, Wei-Lin Key Laboratory ofFunctionalTextile MaterialandProduct ofMinistry ofEducation School ofTextile Science andEngineering Xi'an Polytechnic University Xi’an710048 China Jiangsu Key Laboratory of Micro and Nano Heat Fluid Flow Technology and Energy Application School of Physical Science and Technology Suzhou University of Science and Technology Suzhou215009 China Interdisciplinary Research Center of Biology & Catalysis School of Life Sciences Northwestern PolytechnicalUniversity Xi'An710072 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China

In this study, n-type SnS2 nanosheets and p-type BiOCl nanosheets prepared by hydrothermal method are utilized to construct the heterostructure SnS2-BiOCl composite through ultrasonication and grinding procedures. The piezoelectric SnS2-BiOCl heterojunction nanosheets are incorporated into the ferroelectric polyvinylidene fluoride (PVDF) membrane to fabricate the PVDF-SnS2-BiOCl flexoelectric strain sensor. The optimal amount of SnS2-BiOCl heterojunction in the PVDF-SnS2-BiOCl membrane is determined. A thorough analysis is conducted on the impact of bending curvature, frequency of bending, size and thickness of the membrane, water flapping, underwater bending, resistance to fatigue from repeated bending, and resistance to corrosions from acid and alkali on the membrane's output current and voltage. The experimental and density functional theory (DFT) calculation results indicate that the PVDF-SnS2-BiOCl(2:1)-10% membrane, functioning as a smart strain sensor, has the ability to monitor human joint movements and water fluctuations in different situations. Additionally, it can be used as a coating for polyester and linen fabrics, and can be connected in series or in parallel. The experimental findings align closely with the results obtained from DFT calculations. The outcomes demonstrate that the PVDF-SnS2-BiOCl membrane strain sensor, which is highly flexible, sensitive, and attachable, is well-suited for smart wearable electronic materials. © 2024, The Authors. All rights reserved.

关键词： Heterojunctions

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Non-trivial Topological Surface states Regulation of 1T-OsCoTe2 Enables Selective C―C Coupling for Highly Efficient Photochemical CO2 Reduction Toward C2+ hydrocarbons

arXiv

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arXiv 2024年

作者： Wang, Kangwang Wu, Mingjie Yu, Peifeng Garces, Hector F. Liang, Ying Li, Longfu Zeng, Lingyong Li, Kuan Zhang, Chao Yan, Kai Luo, Huixia School of Materials Science and Engineering State Key Laboratory of Optoelectronic Materials and Technologies Guangdong Provincial Key Laboratory of Magnetoelectric Physics and Devices Key Lab of Polymer Composite & Functional Materials Sun Yat-sen University Guangzhou510275 China State Key Laboratory of New Textile Materials and Advanced Processing Technologies Wuhan Textile University Wuhan430200 China School of Engineering Brown University 182 Hope Street Providence United States The Basic Course Department Guangzhou Maritime University Guangzhou510800 China School of Environmental Science and Engineering Sun Yat-sen University Guangzhou510275 China

Despite ongoing research, the rational design of non-trivial topological semimetal surface states for the selective photocatalytic CO2 conversion into valuable products remains full of challenges. Herein, we present the synthesis of lattice-matched 1T-OsCoTe2 for the photoreduction upgrading of CO2 to tri-carbon (C2) alkane (propane, C2H2) by the integration of experimental work and theory prediction/calculation. Experimental studies suggested a high electron-based selectivity of 71.2% for C3H8 and an internal quantum efficiency of 54.6% at 380 nm. In-situ X-ray photoelectron spectroscopy and X-ray absorption fine structure spectroscopy demonstrated that Co and Os atoms coordinated with Te atoms enable an efficient Os―Te―Co electron transfer to activate the generation of *CH3, *CHOCO and *CH2OCOCO. Density functional theory calculations further confirmed Os―Te―Co electron bridging on the improved CO2 conversion kinetics. To our knowledge, this is the first report suggesting the role of Os atoms in accelerating the photocatalytic CO2 conversion activity of the topological semimetal 1T-OsCoTe2 Copyright © 2024, The Authors. All rights reserved.

关键词： Surface states

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In situ synthesis of oriented Zn-Mn-Co-telluride on precursor free CuO: An experimental and theoretical study of hybrid electrode paradigm for advanced supercapacitors

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Nano materials Science 2024年

作者： Ahmad, Muhammad Nawaz, Tehseen Hussain, Iftikhar Chen, Xi Khan, Shahid Ali Eddahani, Yassine Abraham, B. Moses Ali, Shafqat Wang, Ci Zhang, Kaili Department of Mechanical Engineering City University of Hong Kong 83 Tat Chee Avenue Kowloon Hong Kong A.J. Drexel Nanomaterials Institute and Department of Materials Science and Engineering Drexel University 3141 Chestnut Street PhiladelphiaPA19104 United States Department of Chemistry The University of Hong Kong Hong Kong Department of Chemical Engineering Indian Institute of Technology Kanpur Kanpur208016 India State Key Laboratory of New Textile Materials and Advanced Processing Technologies National Local Joint Laboratory for Advanced Textile Processing and Clean Production Wuhan Textile University Wuhan430200 China Key Lab of In-fiber Integrated Optics Ministry Education of China Harbin Engineering University Harbin150001 China

The evolution of energy storage technology has seen remarkable progress, with a shift from pure metals to sophisticated, tailor-made active materials. The synthesis of nanostructures with exceptional properties is crucial in the advancement of electrode materials. In this regard, our study highlights the fabrication of a novel, oriented heterostructure comprised of Zn-Mn-Co-telluride grown on a pre-oxidized copper mesh using a hydrothermal method followed by a solvothermal process. This innovative approach leads to the formation of the Zn-Mn-Co-telluride@CuO@Cu heterostructure, which demonstrates the unique oriented morphology. It outperforms both Zn-Mn-Co-telluride@Cu and CuO@Cu by exhibiting lower electrical resistivity, increased redox activity, higher specific capacity, and improved ion diffusion characteristics. The conductivity enhancements of the heterostructure are corroborated by density functional theory (DFT) calculations. When utilized in a hybrid supercapacitor (HSC) alongside activated carbon (AC) electrodes, the Zn-Mn-Co-telluride@CuO@Cu heterostructure-based HSC achieves an energy density of 75.7 Wh kg−1. Such findings underscore the potential of these novel electrode materials to significantly impact the design of next-generation supercapacitor devices. © 2024 Chongqing University

关键词： Electrodes

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Synthesis of Trifunctional Inorganic/Organic Hybrid Nanocomposites and Their Applications for Recognition and Elimination of Heavy Metal Ions

SSRN

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SSRN 2022年

作者： Xu, Yaohui Gao, Liangjuan Yang, Zhou Laboratory for Functional Materials School of New Energy Materials and Chemistry Leshan Normal University Sichuan Leshan614000 China State Key Laboratory of New Textile Materials and Advanced Processing Technology Wuhan Textile University Hubei Wuhan430200 China College of Materials Science and Engineering Sichuan University Sichuan Chengdu610065 China

The core-shell nanoparticles with magnetic Fe 3 O 4 as core structure and porous SiO 2 as shell structure were synthesized by the hydrolysis and condensation of tetraethyl orthosil... 详细信息

The core-shell nanoparticles with magnetic Fe 3 O 4 as core structure and porous SiO 2 as shell structure were synthesized by the hydrolysis and condensation of tetraethyl orthosilicate on Fe 3 O 4 seed in an alkaline medium. Subsequently, the inorganic/organic hybrid nanocomposites based on core-shell Fe 3 O 4 @SiO 2 nanoparticles was fabricated using "grafting-from" strategy, and a macrocyclic dioxotetraamine (1,4,8,11-tetraazacyclotetradecane-5,7-dione, TACTDD) was eventually grafted onto the end of Fe 3 O 4 @SiO 2 surface. The as-synthesized nanocomposites possessed three functionality: Firstly, the nanocomposites showed a selective fluorescence response toward Fe 3+ ion, the eye-perceived fluorescence quenching toward Fe 3+ ion under ultraviolet light could be used for the qualitative recognition of Fe 3+ ion;Secondly, the nanocomposites were an excellent adsorbent, exhibited universal adsorption capacities for Fe 3+ , Zn 2+ , Hg 2+ and Pd 2+ ions, and could be recycled by desorption of Na 2 EDTA;Thirdly, the nanocomposites had superparamagnetism and strong magnetic sensitivity, which can facilitate the sustainable removal of heavy metal ions in practical applications. © 2022, The Authors. All rights reserved.

关键词： Desorption

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