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Fast and broadband MoS_(2)photodetectors by coupling WO_(3-x)semi-metal nanoparticles underneath

Journal of materials science & Technology 2024年第26期193卷 217-225页

作者： Qianqian Wu Chenglin Wang Li Li Xinlei Zhang Yanfeng Jiang Zhengyang Cai Liangliang Lin Zhenhua Ni Xiaofeng Gu Kostya(Ken)Ostrikov Haiyan Nan Shaoqing Xiao Engineering Research Center of IoT Technology Applications(Ministry of Education) Department of Electronic EngineeringJiangnan UniversityWuxi 214122China Department of Physics and Key Laboratory of MEMS of the Ministry of Education Southeast UniversityNanjing 211189China School of Chemical and Material Engineering Jiangnan UniversityWuxi 214122China School of Physics and Chemistry and QUT Centre for Materials Science Queensland University of Technology(QUT)BrisbaneQueensland 4000Australia

Coupling two-dimensional(2D)materials with plasmonic nanoparticles(NPs)holds great potential for enhancing the photodetection performance in 2D ***,there are limitations in the detection spectral range and response speed of plasmonic 2D photodetectors based on transition metal dichalcogenides(TMDs)like MoS_(2).We have developed a fast and broadband MoS_(2)photodetector(denoted as MoS_(2)/WO_(3-x))by coupling semi-metal sub-stoichiometric WO_(3-x)NPs beneath,in contrast to traditional WO_(3-x)/MoS_(2)photodetectors with the opposite positions of MoS_(2)and WO_(3-x)*** photodetection performance is 10 times higher than the WO_(3-x)/MoS_(2)structure,and 100 times higher than the pristine MoS_(2)device,broadening the spectrum to near-infrared(NIR),achieving a maximum responsivity and detectivity that can reach 1.8×10^(4)A W-1,4.62×10^(13)Jones,respectively,under 940 nm *** response speed exceeds the state-of-the-art MoS_(2)photodetectors based on composite structures,unprecedentedly reaching the order of tens of *** understanding of WO_(3-x)NPs as well as light interaction with the MoS_(2)layer reveal that the exceptional photoelectric performance can be attributed to the synergistic effect of both the semimetal nature of the underneath WO_(3-x)NPs and the intact nature of the top MoS_(2)*** mechanism enhances optical absorption,expands the spectral range,and simultaneously speeds up optoelectronic effects.

关键词： WO_(3-x)nanoparticles Plasmonic MoS_(2)/WO_(3-x)photodetector Fast broadband

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Recent progress in C-N coupling for electrochemical CO_(2) reduction with inorganic nitrogenous species in aqueous solution

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materials Reports(Energy) 2023年第1期3卷 65-77,I0003页

作者： Shuxia Liu Tanyuan Wang Lior Elbaz Qing Li State Key Laboratory of Material Processing and Die&Mould Technology School of Materials Science and EngineeringHuazhong University of Science and TechnologyWuhanHubei430074China Department of Chemistry and the Institute of Nanotechnology and Advanced Materials Bar-Ilan UniversityRamat-Gan5290002Israel

The electrocatalytic CO_(2) reduction in aqueous solution mainly involves bond cleavage and formation between C,H and O,and it is highly desirable to expand the bond formation reaction of C with other atoms to obtain novel and valuable *** electrochemical synthesis of N-containing organic chemicals in electrocatalytic CO_(2) reduction via introducing N sources is an effective strategy to expand the product scope,since chemicals con-taining C–N bonds(*** and amines)are important reactants/products for medicine,agriculture and *** article focuses on the research progress of C–N coupling from CO_(2) and inorganic nitrogenous species in aqueous ***,the reaction pathways related to the reaction intermediates for urea,formamide,acetamide,methylamine and ethylamine are ***,the electrocatalytic performance of different catalysts for these several N-containing products are summarized and ***,the challenges and op-portunities are analyzed,aiming to provide general insights into future research directions for electrocatalytic C–N coupling.

关键词： CO_(2) reduction C-N coupling Heterogeneous electrocatalysis Amide Amine

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Analysis of Solid-Gas interaction in bulk powder flow in counter current reactor using DEM

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materials Today: Proceedings 2022年 65卷 111-126页

作者： Jikar, P.C. Dhokey, N.B. Shinde, S.S. Department of Metallurgy and Material Science College of Engineering Pune 411005 India Vikarsh Nano Technology and Alloys Pvt. Ltd Pune 411030 India

Mill scale is a waste product of steel mills that comprises 70% of iron most of the studies focused mainly on static beds. In this research, a narrow range of particle size (53 µm-106 µm) grounded mill scale powder was first oxidized in the counter-current reactor to make pure iron oxide at 1100 °C using pure oxygen. Then this oxidized powder was reduced, keeping the gas mix (H2:N2-1:1) at 875 °C in CCR. The study assumed bulk powder flow with and without interruption using a mechanical lifter placed in a parallel position inside the reactor, which operated in the range 2–5 rpm revolution (ω) and filling degree (fd) in the range of 5.38% to 16.14%. A Discrete Element Method (DEM) simulation has been used and validated with experimental condition employed. This work signifies the impact of interruption in bulk powder flow on solid–gas reaction. The degree of reducibility was indirectly explained using XRD and SEM of the reduced powder. © 2022

关键词： Particle size

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Effect of poly(4-tert-butylstyrene)block length on the microphase structure of poly(ethylene oxide)-b-poly(4-vinylbenzyl chloride)-b-poly(4-tert-butylstyrene)triblock terpolymers

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Chinese Chemical Letters 2023年第6期34卷 551-555页

作者： Kun An Jia Gao Yihang Chen Jingjing Nie Yongjin Li Junting Xu Binyang Du State Key Laboratory of Motor Vehicle Biofuel Technology Department of Polymer Science&EngineeringZhejiang UniversityHangzhou 310027China College of Material Chemistry and Chemical EngineeringHangzhou Normal UniversityHangzhou 310036China Department of Chemistry Zhejiang UniversityHangzhou 310027China

A series of linear poly(ethylene oxide)-b-poly(4-vinylbenzyl chloride)-b-poly(4-tert-butylstyrene)(PEO_(113)-b-PVBC_(130)-b-Pt BS_(x)or E_(113)V_(130)T_(x))triblock terpolymers with various lengths x(=20,33,66,104,215)of Pt BS block were synthesized via a two-step reversible addition-fragmentation chain transfer(RAFT)*** E_(113)V_(130)T_(x)triblock terpolymers were non-crystalline because the PVBC and Pt BS blocks strongly hindered the crystallization of PEO *** effects of Pt BS block length x on the phase structures of E_(113)V_(130)T_(x)triblock terpolymers were investigated by combined techniques of small-angle X-ray scattering(SAXS)and transmission electron microscopy(TEM).It was found that with increasing x from20 to 215,the phase structure of E_(113)V_(130)T_(x)triblock terpolymers became more ordered and changed from disordered structure,hexagonally-packed cylinder(HEX),hexagonally perforated layer(HPL),to lamellar(LAM)phase ***-variable SAXS measurements showed that the HEX,HPL and LAM phase structures obtained for E_(113)V_(130)T_(66),E_(113)V_(130)T_(104)and E_(113)V_(130)T_(215)by thermal annealing,respectively,were thermodynamically stable in the temperature range of 30-170℃.

关键词： ABC triblock terpolymer Phase structure SAXS HPL Thermodynamically stable

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Experimental Study on Ground Reaction Force Parameters with Regard to Novice and Recreational Runners 7

Experimental Study on Ground Reaction Force Parameters with ...

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7th International Conference on material Strength and Applied Mechanics, MSAM 2024

作者： Jiang, Xinyan Bíró, István Wang, Hai-Qiao Dilna, Natalia Nemoga, Karol Fekete, Gusztáv Doctoral School on Safety and Security Sciences Óbuda University Budapest Hungary Institute of Technology Faculty of Engineering University of Szeged Szeged Hungary School of Material Science and Engineering NingboTech University Ningbo China Institute of Mathematics Slovak Academy of Sciences Bratislava Slovakia Department of Material Science and Technology Audi Hungaria Faculty of Vehicle Engineering Széchenyi István University Gyor Hungary

ISBN: (纸本)9781643685472

The connection between running experience and running-related injuries is still unclear, and the underlying mechanisms are yet to be fully investigated. Therefore, this study aimed to investigate differences in ground reaction forces (GRFs) between novice runners and recreational runners. 15 novice and 15 recreational runners participated in this study. An independent samples T-test was applied using SPSS 25.0 and SPM1D via Matlab. The results showed that recreational runners exhibited a significantly larger peak vertical impact force and peak medial force than the novice group, while the peak propulsive force was smaller than the novice group. The SPM1D results also showed that recreational runners and novice runners exhibited significant differences in medial-lateral force, anterior-posterior force and vertical force. The differences between the groups may reveal differences in running kinetics, which could be related to superior running performance or ability. Valuable insights may be gained from this study to guide future research on injury risks and performance benefits from running. © The Author(s), 2024.

关键词： Biomechanics ground reaction forces injuries SPM1D

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Highly-efficient thermoelectric-driven light-emitting diodes based on colloidal quantum dots

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Nano Research 2022年第10期15卷 9402-9409页

作者： Xing Lin Xingliang Dai Zikang Ye Yufei Shu Zixuan Song Xiaogang Peng Key Laboratory of Excited-State Materials of Zhejiang Province Department of ChemistryZhejiang UniversityHangzhou 310027China College of Information Science and Electronic Engineering Zhejiang UniversityHangzhou 310027China State Key Laboratory of Silicon Materials Department of Material Science and EngineeringZhejiang UniversityHangzhou 310027China College of Optical Science and Engineering Zhejiang UniversityHangzhou 310027China

Driven by sub-bandgap electric work and Peltier heat,thermoelectric-driven light-emitting diodes(TED-LEDs)not only offer much enhanced power-conversion-efficiency but also eliminate the waste heat generated during the operation of ***,costeffective and high-efficiency TED-LEDs are not readily accessible for the epitaxially grown III-V LEDs due to the high chip cost and efficiency droop at low-medium brightness(current densities).Here we show that electroluminescence of colloidal quantum dots(QDs)LEDs(QLEDs)circumvents the deficiencies faced by conventional *** optimal red-emitting device fabricated by cost-effective solution processing technics exhibits external-and internal-power-conversion-efficiency of 21.5%and 93.5%at 100 cd/m^(2),suited for high-efficiency solid-state lighting and high-resolution *** this brightness,the electric driving voltage(V)of 1.89 V is lower than the photon voltage(Vp=hv/q=1.96 V,q being the elemental charge).With typical Vp=1.96 V,electroluminescence can be detected with the driving voltage as low as 1.0-1.2 *** of the thermoelectric-driven QLEDs(TED-QLEDs)remains ideally diffusion-dominated with the driving voltage lower than~1.5 V,and further improvement on charge transport is expected to extend the linear ideality to all practical driving voltages.

关键词： light-emitting diodes up-conversion electroluminescence colloidal quantum dot thermoelectric-driven power efficiency

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Construction of Ag_(2)CO_(3)/BiOBr/CdS ternary composite photocatalyst with improved visible-light photocatalytic activity on tetracycline molecule degradation

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Journal of Environmental sciences 2023年第3期125卷 47-60页

作者： Kaliyappan Perumal Shajahan Shanavas Tansir Ahamad Annamalai Karthigeyan Padmanabhan Murugakoothan Material Research and Development Laboratory Postgraduate and Research Department of PhysicsPachaiyappa’s CollegeChennai 600030India Nano and Hybrid Materials Laboratory Department of PhysicsPeriyar UniversitySalem 636001India Department of Chemistry College of ScienceKing Saud UniversityRiyadh 11451Saudi Arabia Department of Physics and Nanotechnology Faculty of Engineering and TechnologySRM Institute of Science and TechnologyKattankulathurKanchipuram 603203India

Photocatalytic degradation was considered as a best strategy for the removal of antibiotic drug pollutants from *** photocatalyst of ABC (Ag_(2)CO_(3)/BiOBr/CdS) composite synthesized by hydrothermal and precipitation *** ABC composite used to investigate the degradation activity of tetracycline (TC) under visible light *** physicochemical characterization methods (*** electron microscopy (SEM),transmission electron microscopy (TEM),high resolution-transmission electron microscopy (HR-TEM),ultraviolet visible spectroscopy (UV),photoluminescence (PL) and time resolved photoluminescence (TRPL) clearly indicate that the composite has been construct successfully that enhances the widened visible light absorption,induces charge transfer and separation efficiency of electron–hole *** photocatalytic activity of all samples was examined through photodegradation of tetracycline in aqueous *** photocatalytic degradation rate of ABC catalyst could eliminate 98.79% of TC in 70 min,which is about 1.5 times that of Ag_(2)CO_(3),1.28 times that of BiOBr and 1.1 times that of BC catalyst,*** role of operation parameters like,TC concentration,catalyst dosage and initial pH on TC degradation activity were *** experiment was demonstrated that·OH and O_(2)·-were played a key role during the photocatalysis process that was evidently proved in electron paramagnetic resonance (EPR) *** addition,the catalyst showed good activity perceived in reusability and stability test due to the synergistic effect between its *** mechanism of degradation of TC in ABC composite was proposed based on the detailed *** current study will give an efficient and recyclable photocatalyst for antibiotic aqueous pollutant removal.

关键词： Ag_(2)CO_(3)/BiOBr/CdS Photocatalyst Tetracycline Degradation Stability

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Determination of interfacial heat transfer coefficient at the frozen sand mold casting process of ZL101 alloy

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Journal of materials science & Technology 2024年第27期194卷 28-42页

作者： Shijie Dong Zhongde Shan Feng Lin Haoqin Yang Xiao Liang Department of Mechanical Engineering Tsinghua UniversityBeijing 100084China State Key Laboratory of Advanced Forming Technology and Equipment China Academy of Machinery Science and TechnologyBeijing 100037China Key Laboratory for Advanced Materials Processing Technology Ministry of Education of ChinaBeijing 100084China College of Mechanical and Electrical Engineering Nanjing University of Aeronautics and AstronauticsNanjing 210016China College of Material Science and Technology Nanjing University of Aeronautics and AstronauticsNanjing 210016China

Compared to the resin sand mold casting process, frozen casting is more environmentally friendly, providing a better working environment and enhanced supercooling degree. The interfacial heat transfer coefficient (IHTC) between frozen sand mold and metal is an important parameter that significantly influences the final mechanical properties and microstructure of the castings. This paper solved the inverse heat conduction problem using the finite difference method (FDM). In addition, the conjugate gradient method (CGM) was adopted to calculate the temperature distribution and heat flux in the molten metal. At the same time, the particle swarm optimization algorithm (PSO) was used in temperature distribution determination in frozen sand mold. The interfacial heat transfer coefficient (IHTC) was estimated during the solidification of ZL101. The results showed a good agreement between calculated and experimental data, obtaining accurate casting interface temperature Tm, frozen sand mold interface temperature Ts, heat flux q, and IHTC. The analysis of the IHTC variation revealed a water content value within the range of 4 wt.% to 5 wt.% resulted in IHTC in two types of interpretation, called ‘fluctuation type’ and ‘turning type’.

关键词： Frozen sand mold Interfacial heat transfer coefficient(IHTC) Finite difference method(FDM) Conjugate gradient method(CGM) Particle swarm optimization(PSO)

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Bionic Flexible Texture Design Based on Bio-Fouling Suppression Effect for Protection of Marine Structures

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China Ocean engineering 2023年第5期37卷 842-848页

作者： YI Peng WU Yu-peng CAI Bao-ping TIAN Xing-hui Javad MOSTAGHIMI YANG Xiao-shuang LYU Ming-li College of Mechanical and Electrical Engineering China University of PetroleumQingdao 266580China Department of Mechanical and Industrial Engineering University of TorontoToronto ONM5S3G8Canada Qingdao Yongzhao New Material Science&Technology Co.Ltd. Qingdao 266061China

Marine equipments such as marine risers and oil pipelines operate in complex underwater environments and are usually attached by animals,plants and *** attachment of marine fouling organisms will accelerate the corrosion damage of offshore structure and greatly reduce the service *** have shown that non-smooth bionic surfaces with specific microstructures can inhibit fouling *** on the idea of bionics,this paper proposes a new type of underwater flexible fretting texture,which is a composite material prepared by mixing graphene and silicone rubber,and modified by pulsed laser to construct a hexagonal bionic surface *** the impact of specific water flow,the flexible texture can produce an angular displacement around 8°and a linear displacement in the amplitude range of 165μm,and the inhibition rate of fouling biological diatoms up to 97.5%,which can effectively avoid the occurrence of marine biological *** results provide a new idea for the surface protection of marine structures,which is of great significance for the development of marine industry.

关键词： flexible microstructure marine antifouling algae attachment laser-induced texture

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Trinuclear Nickel Catalyst for Water Oxidation:Intramolecular Proton-Coupled Electron Transfer Triggered Trimetallic Cooperative O-O Bond Formation

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CCS Chemistry 2023年第1期5卷 245-256页

作者： Qi-Fa Chen Yao Xiao Rong-Zhen Liao Ming-Tian Zhang Center of Basic Molecular Science(CBMS) Department of ChemistryTsinghua UniversityBeijing 100084 Key Laboratory of Material Chemistry for Energy Conversion and Storage Ministry of EducationSchool of Chemistry and Chemical EngineeringHuazhong University of Science and TechnologyWuhan 430074

We report a molecular trinuclear nickel(TNC-Ni)catalyst for water oxidation that exhibited high catalytic performance and stability under neutral conditions(pH 7).Electrochemical studies disclosed that cooperation among the three nickel sites plays a vital role in both charge accumulation and O-O bond *** TNC-Ni catalyst could accomplish 4e−oxidation of water by involving all three nickel sites and the O-O bond formation was triggered by a charge distribution process from 5 to 5_(dp) via proton-coupled electron transfer.

关键词： water oxidation proton-coupled electron transfer nickel catalyst artificial photosynthesis O-O bond formation

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