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Planar metasurface‑based concentrators for solar energy harvest:from theory to engineering

PhotoniX 2022年第1期3卷 38-72页

作者： Cheng Zhang Yujie Zhan Yongxue Qiu Leilei Xu Jianguo Guan Hubei Engineering Research Center of RF‑Microwave Technology and Application School of ScienceWuhan University of TechnologyWuhan 430070China State Key Lab of Advanced Technology for Materials Synthesis and Processing International School of Materials Science and EngineeringWuhan University of TechnologyWuhan 430070China

Solar energy is an inexhaustible renewable energy resource,which is a potential solution to global warming and aids sustainable *** use of solar-thermal collectors to harness solar energy facilitates low-cost heat storage and can improve the stability of power grids based on renewable *** solar-thermal collectors,traditional concentrators,such as parabolic troughs and dishes,are typically used but inevitably require high-precise supports and complex tracking sun systems,which increase the cost of solar-thermal power stations and hinder their further *** contrast,planar meta-lenses(so-called metasurface-based concentrators)consisting of two-dimensional nanostructured arrays are allowed to engineer the frequency dispersion and angular dispersion of the incident light through delicately arranging the aperture phase distribution,thereby correcting their inherent ***,the novel meta-lenses offer tremendous potentials to effectively capture broadband,wide-angle sunlight without the extra tracking *** review summarizes the research motivation,design principles,building materials,and large-area fabrication methods of meta-lens for solar energy harvesting in terms of focusing efficiency,operation bandwidth,and angular *** addition,the main challenges and future goals are examined.

关键词： Solar-thermal collector Metasurface Concentrator Solar energy harvesting

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Thermoelectric Properties of n-type Full-Heusler Fe_(2-2x)Co_(2x) TiSn Prepared by an Ultra-fast synthesis Process

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Journal of Wuhan University of technology(materials Science) 2021年第4期36卷 497-504页

作者： ZHAO Dongyan CHEN Yanning WANG Yubo ZHANG Haifeng FU Zhen WANG Shuaipeng YU Wen DU Jian WANG Wenhe QIU Junhao YAN Yonggao Beijing Engineering Research Center of High-reliability IC with Power Industrial Grade Beijing Smart-Chip Microelectronics Technology Co.Ltd.Beijing 100192China Beijing Chip Identification Technology Co. Ltd.Beijing102200China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of TechnologyWuhan 430070China

Full-Heusler alloy Fe_(2)TiSn was predicted to be a potential thermoelectric material with high mechanical properties and ***_(2)TiSn was usually prepared by arc-melting followed by annealing for 2 weeks,which takes a long time and consumes a large amount of *** this paper,Fe_(2)TiSn was prepared by an ultra-fast method,self-propagating high-temperature synthesis (SHS) combined with spark plasma *** bulk materials with uniform element distribution,well controlled composition and relative densities of over 97.5% were *** undoped Fe_(2)TiSn samples show p-type transport *** was heavily doped at the Fe site to prepare n-type Fe_(2-2x)Co_(2x) TiSn *** thermoelectric properties measurements carried out on the Co-doped samples show a highest ZT=0.02 at 300 K,which is about tripe the performance of the pristine Fe_(2)*** study provides a new approach for the rapid and low-cost preparation of full-Heusler thermoelectric materials.

关键词： thermoelectric full-Heusler Fe2TiSn SHS thermoelectric properties

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A Rate-Dependent Peridynamic Model for the Dynamic Behavior of Ceramic materials

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Computer Modeling in Engineering & Sciences 2020年第7期124卷 151-178页

作者： Bufan Chu Qiwen Liu Lisheng Liu Xin Lai Hai Mei Department of Engineering Structure and Mechanics Wuhan University of TechnologyWuhan430070China Hubei Key Laboratory of Theory and Application of Advanced Materials Mechanics Wuhan430070China State Key Laboratory of Materials Synthesis and Processing Wuhan430070China

In this study,a new bond-based peridynamic model is proposed to describe the dynamic properties of ceramics under impact *** materials show pseudo-plastic behavior under certain compressive loadings with high strain-rate,while the characteristic brittleness of the material dominates when it is subjected to tensile *** this model,brittle response under tension,softening plasticity under compression and strain-rate effect of ceramics are considered,which makes it possible to accurately capture the overall dynamic process of *** enables the investigation of the fracture mechanism for ceramic materials,during ballistic impact,in more ***,a bond-force updating algorithm is introduced to perform the numerical simulation and solve the derived *** proposed model is then used to analyze the dynamic response of ceramics tiles under impact loading to assess its *** results of damage development in ceramic materials are calculated and compared with the experimental *** simulation results are consistent with the experiments,which indicates that the proposed rate-dependent peridynamic model has the capability to describe damage propagation in ceramics with good ***,based on a comparison between simulation and experimental results,it can be concluded that the damage results are in better agreement with experimental results than non-ordinary state-based peridynamic method.

关键词： Penetration ceramic peridynamics rate-dependency crack

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An ultralight,flexible,and biocompatible all-fiber motion sensor for artificial intelligence wearable electronics

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npj Flexible Electronics 2022年第1期6卷 235-242页

作者： Sen Lin Shuang Hu Wei Song Miaoqing Gu Junchen Liu Jianan Song Zhenglian Liu Ziwei Li Kun Huang Yufeng Wu Ming Lei Hui Wu School of Physical Science and Technology Guangxi UniversityNanning 530004China Advanced Institute for Brain and Intelligence Guangxi UniversityNanning 530004China State Key Laboratory of Information Photonics and Optical Communications and School of Science Beijing University of Posts and TelecommunicationsBeijing 100876China State Key Laboratory of New Ceramics and Fine Processing School of Materials Science and EngineeringTsinghua UniversityBeijing 100084China

New-generation human body motion sensors for wearable electronics and intelligent medicine are required to comply with stringent requirements in terms of ultralight weight,flexibility,stability,biocompatibility,and extreme ***,conventional sensors are hard to fulfill all these criteria due to their rigid structure,high-density sensing materials used as the constituents,as well as hermetical and compact assembly ***,we report an ultralight sensing material based on radial anisotropic porous silver fiber(RAPSF),which has been manufactured by phase separation and temperature-controlled grain growth strategy on a modified blow-spinning *** resistance of RAPSF could be dynamically adjusted depending on the deflected ***,an all-fiber motion sensor(AFMS)with an ultra-low density of 68.70 mg cm^(−3) and an overall weigh of 7.95 mg was fabricated via layer-by-layer *** sensor exhibited outstanding flexibility,breathability,biocompatibility,and remarkable body motion recognition ***,the AFMS was shown to have great potential as an artificial intelligence throat sensor for throat state identification at the accuracy above 85%,allowing one to spot the early onset of the viral throat illness.

关键词： fiber artificial motion

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Fine-Tuning of Structural Distortion and Magnetic Anisotropy by Organosulfonates in Octahedral Cobalt(Ⅱ)Complexes

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Chinese Journal of Chemistry 2022年第18期40卷 2193-2202页

作者： Dong Shao Fang-Xue Xu Lei Yin Hong-Qing Li Yu-Chen Sun Zhong-Wen Ouyang Zhen-Xing Wang Yi-Quan Zhang Xin-Yi Wang State Key Laboratory of Coordination Chemistry Collaborative Innovation Center of Advanced MicrostructuresSchool of Chemistry and Chemical EngineeringNanjing UniversityNanjingJiangsu210023 China Hubei Key Laboratory of Processing and Application of Catalytic Materials College of Chemistry and Chemical EngineeringHuanggang Normal UniversityHuanggangHubei438000 China Jiangsu Key Laboratory for NSLSCS School of Physical Science and TechnologyNanjing Normal UniversityNanjingJiangsu210097 China Wuhan National High Magnetic Field Centre Huazhong University of Science and TechnologyWuhanHubei430074 China

Precise modulation of the magnetic anisotropy of metal ions remains highly important for the development of high–performance single-molecule magnets(SMMs).We herein reported the synthetic,structural,spectral,magnetic,and computational studies on four mononuclear Co^(Ⅱ) complexes in a distorted octahedral *** change of the organosulfonate anions triggers significant modification of the distorted octahedral CoN6 coordination sphere,which enables us to tackle the influence of the structural distortion on the magnetic anisotropy in these *** measurements revealed that the four complexes possess easy–plane magnetic anisotropy with large and positive zero-field splitting parameters,which decrease with the increasing distortion of the pseudo–octahedral Co^(Ⅱ) coordination *** correlation was further confirmed by high–frequency/–field EPR(HF–EPR)spectra and theoretical *** magnetic susceptibility measurements indicate that these complexes both exhibit slow magnetic relaxation under an external dc field,indicating the field-induced single-ion magnets(SIMs)of the four *** results indicate that structural distortion plays an important role in the magnetic anisotropy of CoⅡcomplexes and should be carefully considered in the design of molecular complexes with high magnetic anisotropy.

关键词： Cobalt Solid-state structures Magnetic properties Single-molecule magnets /Magnetic anisotropy

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One-Step Electrodeposition of Amorphous Mosx - CDS on Ti Mesh as a Monolithic Heterostructured Photocatalyst for Enhanced Photocatalytic H2 Evolution

SSRN

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SSRN 2022年

作者： Zhang, Jingtao Zeng, Dongni Xu, Changfu Hu, Wenchao Liu, Peng Cao, Shaowen Chen, Ying School of Materials and Energy Guangdong University of Technology Guangzhou510006 China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing Wuhan University of Technology Wuhan430070 China

Exploiting large-size monolithic semiconductor photocatalyst sheet/layer with superior photocatalytic hydrogen production performances through facile and scalable methods is an important research direction in promoting the practical application of traditional particulate semiconductor photocatalyst, yet challenging. Here we constructed an amorphous MoSx - CdS monolithic heterostructured photocatalyst sheet (a-MoSx - CdS/Ti) with maximal size of ~100 cm2 through a one-step potentiostatic electrodeposition process of 5 minutes on titanium mesh used as photocatalyst support. Owing to synergic effects of favorable light absorption, abundant active sites for proton reduction, effective photogenerated charge separation and robust structural integrity, the a-MoSx - CdS/Ti not only exhibits an optimized H2 generation rate of 4476 μmol h−1 g−1, but also demonstrates excellent operability during photocatalytic H2 generation and subsequent recycling processes, greatly improving its applicability. This work presents a straightforward and practical route to produce efficient, robust and easily operable photocatalytic H2 production system which expectantly finds promising practical applications in photocatalysis, photoelectrocatalysis and beyond. © 2022, The Authors. All rights reserved.

关键词： Cadmium sulfide

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气体灌注超润湿膜分离溶质

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Science Bulletin 2023年第24期68卷 3111-3113页

作者：董莹李静阳晓宇 Department of Forensic Medicine Tongji Medical CollegeHuazhong University of Science and TechnologyWuhan 430030China Hubei Province Key Laboratory of Coal Conversion and New Carbon Materials School of Chemistry and Chemical EngineeringWuhan University of Science and TechnologyWuhan 430081China State Key Laboratory of Advanced Technology for Materials Synthesis and Processing&Shenzhen Research Institute&Laoshan Laboratory Wuhan University of TechnologyWuhan 430070China School of Engineering and Applied Sciences Harvard UniversityCambridge MA 02138USA

Membranes,including those that are based on nanofiltration and reverse osmosis(RO),have become important components of systems used for efficient removal of ions and small molecules from *** containing nanofiltration membranes are employed to separate divalent ions and>200 g mol-1molecules utilizing size-and charge-exclusion mechanisms.

关键词： mechanisms utilizing charge

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Cellulose Composite Kvo Films and Self-Healing Loc Gel Electrolyte for Multifunctional Flexible Electrochromic Device

SSRN

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SSRN 2023年

作者： Sun, Shuokun Xia, Xiaoyan Gao, Mingrui Wei, Wei Cui, Shichuang Zhu, Quanyao School of Materials Science and Engineering Wuhan University of Technology Hubei Wuhan430070 China State Key Laboratory of Advanced Technology For Materials Synthesis and Processing Hubei Wuhan430070 China Department of Physics Changji University Xinjiang Changji831100 China

Electrochromic materials have attracted intensive attention due to friendly relationship to the environment, energy and user experience. Layered vanad-based compounds are considered as one kind of the most promising electrochromic materials. However, they are plagued by the appearance of ion channel collapse, capacity loss, and aqueous electrochromic materials exhibit poor cycling stability. Herein, we report on KV3O8·0.75H2O (KVO) and further complexed it into a network formed by linear methylcellulose, realizes a stand-alone cellulose composite KVO electrochromic film. K doping destroys the preferred orientation of V2O5 (002) crystal plane and expands the interplanar spacing to 6.9 Å. Cellulose significantly increases the viscosity of the sol (6 times) and acts as a "strengthener". Firstly, the electrochromic properties of methylcellulose composite KVO film (KVO/MC) were studied in 1 mol L-1 LiClO4 nonaqueous electrolyte. The film can freely switch between green-yellow and orange-red, and can retain more than 67% of the charge capacity after 2000 cycles. We further introduce flexible electrochromic devices assembled from KVO/MC films. Development of a self-healing LOC-based gel electrolyte composed of Ethene, 1-chloro-1,2,2-trifluoro-, polymer with 1,1- difluoroethene (P(CTFE-VDF)) and Li+ electrolyte, which is highly consistent with the device. It has a high colouring efficiency of 78.8 cm2 C -1 , achieving fast response (≤5.6 s) and long service life (>77% of the charge capacity and 70% of the optical contrast after 10000 cycles). This design shows great application potential in manufacturing large-area (20×30 cm2 ) flexible devices. © 2023, The Authors. All rights reserved.

关键词： Electrochromism

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Pre-Oxidation for Enhanced Resistance of Afa Steel to High-Temperature Molten Salt Corrosion

SSRN

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SSRN 2024年

作者： Jiang, Haocheng Yu, Haicun Gao, Yunteng Zhan, Faqi Xu, Shipeng La, Peiqing State Key Laboratory of Advanced Processing and Recycling of Non-ferrous Metals School of Materials Science and Engineering Lanzhou University of Technology Lanzhou730050 China Lanzhou University of Technology China

This study employs vacuum induction melting followed by pre-oxidation strategy to develop an alumina-forming austenitic (AFA) steel, aiming to enhance its resistance against corrosion in molten salt environments. The corrosion behavior of the steel, both before and after pre-oxidation, is investigated in a ternary carbonate molten salt at 650°C. The results reveal that pre-oxidation markedly decreases the corrosion rate from 1000.72 μm/year to 204.99 μm/year. This reduction is attributed to the formation of a protective layer composed of Al2O3 and LiAlO2 oxides. It highlights the effectiveness of pre-oxidation in improving the durability of materials against corrosive damage in high-temperature molten salt environments. © 2024, The Authors. All rights reserved.

关键词： Alumina

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Polymersome formation by solvent annealing-induced structural reengineering under 3D soft confinement

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Nano Research 2021年第12期14卷 4644-4649页

作者： Xi Mao Hao Li Jinwoo Kim Shuai Deng Renhua Deng Bumjoon J.Kim Jintao Zhu Key Laboratory of Material Chemistry for Energy Conversion and Storage of Ministry of Education(HUST) and State Key Laboratory of Materials Processing and Die&Mold TechnologySchool of Chemistry and Chemical EngineeringHuazhong University of Science and Technology(HUST)Wuhan430074China Department of Chemical and Biomolecular Engineering Korea Advanced Institute of Science and Technology(KAIST)Daejeon34141Republic of Korea

A solvent annealing-induced structural reengineering approach is exploited to fabricate polymersomes from block copolymers that are hard to form vesicles through the traditional solution self-assembly *** specifically,polystyrene-b-poly(4-vinyl pyridine)(PS-b-P4VP)particles with sphere-within-sphere structure(SS particles)are prepared by three-dimensional(3D)soft-confined assembly through emulsion-solvent evaporation,followed by 3D soft-confined solvent annealing upon the SS particles in aqueous dispersions for structural engineering.A water-miscible solvent(e.g.,THF)is employed for annealing,which results in dramatic transitions of the assemblies,e.g.,from SS particles to *** approach works for PS-b-P4VP in a wide range of block ***,this method enables effective encapsulation/loading of cargoes such as fluorescent dyes and metal nanoparticles,which offers a new route to prepare polymersomes that could be applied for cargo release,diagnostic imaging,and nanoreactor,etc.

关键词： polymersome block copolymer three-dimensional(3D)confinement self-assembly solvent annealing

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