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Insights into photocatalytic mechanism over a novel Cu_(2)WS_(4)/MoS_(2) S-scheme heterojunction

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Rare Metals 2024年第7期43卷 3118-3133页

作者： Wei Zhao Ji-Hui Cao Jun-Jie Liao Yun Liu Xiao-Jun Zeng Jun-Yu Shen Xue-Kun hong Yang Guo He-Hua Zeng Ya-Zi Liu School of Materials Engineering Jiangsu Key Laboratory of Advanced Functional MaterialsSchool of Electronic and Information EngineeringChangshu Institute of TechnologyChangshu215500China School of Chemistry and Chemical Engineering Changji UniversityChangji 831100China State Environmental Protection Key Laboratory of Soil Environmental Management and Pollution Control Ministry of Ecology and EnvironmentNanjing Institute of Environmental SciencesNanjing 210023China School of Environment Jiangsu Engineering Lab of Water and Soil Eco-RemediationNanjing Normal UniversityNanjing 210023China Department of Chemical Engineering Curtin UniversityPerthWA6845Australia

A novel efficient Cu_(2)WS_(4)/MoS_(2) step-scheme(S-scheme)heterojunction photocatalyst was constructed for the first time and applied in the removal of environmental *** the as-prepared photocatalysts,the Cu_(2)WS_(4)/MoS_(2)-8%heterojunc tion photoc atalyst demonstrates the optimal photocatalytic performance,with the catalytic oxidation efficiency of tetracycline(TC)and the catalytic reduction efficiency of Cr^(6+)reaching 93.3%and 82.1%,*** excellent catalytic properties of Cu_(2)WS_(4)/MoS_(2) heterojunction photocatalysts are attributed to the effective separation pathways of charges and the presence of S-scheme heterojunctions,together with stronger redox *** is speculated that the photogenerated carrier migration path of the Cu_(2)WS_(4)/MoS_(2) catalyst follows the typical S-scheme photocatalytic mechanism,which is verified by the in-depth experimental study and simulated calculations including the electron paramagnetic resonance(EPR)analysis,free radical quenching experiments,charge density distribution,and simulated built-in electric field formation at the interface,which acts as driving force to promote the separation of photoinduced electrons and ***,the photocatalytic mechanism of S-scheme photogenerated carrier migration for the Cu_(2)WS_(4)/MoS_(2) catalyst is revealed based on the systematic experimental techniques and simulated calculations,accounting for its superior photocatalytic oxidation and reduction *** study provides inspiring implications to develop high-efficient S-scheme photocatalytic systems for versatile applications in solarenergy conversion.

关键词： Cu_(2)WS_(4)/MoS_(2) S-scheme Heterojunction Photocatalysis

High-performance Na1.25V3O8 nanosheets for aqueous zinc-ion battery by electrochemical induced de-sodium at high voltage

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Chinese Chemical Letters 2020年第9期31卷 2268-2274页

作者： Di Xie Fang Hu Xin Yu Fuhan Cui Guihong Song Kai Zhu School of Materials Science and Engineering Shenyang University of TechnologyShenyang 110870China Key Laboratory of Superlight Materials and Surface Technology of Ministry of Education College of Materials Science and Chemical EngineeringHarbin Engineering UniversityHarbin 150010China Department of Mechanical Engineering The Hong Kong Polytechnic UniversityHong KongChina

Aqueous rechargeable zinc-ion batteries(ARZIBs) are expected to replace organic electrolyte batteries owing to its low price,safe and environmentally friendly ***,we fabricated vanadium-based Na1.25V3O8 nanosheets as a cathode material for ARZIBs,which present a high performance by electrochemical de-sodium at high voltage to form Na2V6O16 phase in the first cycle:high capacity of 390 mAh/g at 0.1 A/g,high rate perfo rmance(162 mAh/g at 10 A/g) and superior cycle stability(179 mAh/g with a high capacity retention of 88.2% of the maximum capacity after 2000 cycles).In addition,the cell exhibits a high energy density of 416.9 Wh/kg at 143.6 W/kg,suggesting great potential of the as-prepared Na1.25V3O8 nanosheets for ARZIBs.

关键词： Na1.25V3O8 nanosheets Aqueous rechargeable zinc-ion batteries Electrochemical de-sodium Cycle stability High energy density

Telluride semiconductor nanocrystals:progress on their liquid-phase synthesis and applications

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Rare Metals 2022年第8期41卷 2527-2551页

作者： Meng-Yao Su Xin-Yuan Li Jia-Tao Zhang Institute of Engineering Medicine Beijing Institute of TechnologyBeijing100081China MOE Key Laboratory of Cluster Science School of Chemistry and Chemical EngineeringBeijing Institute of TechnologyBeijing100081China

The synthesis of colloidal telluride semiconductor nanocrystals(CT-SNCs)is more challenging than that of chalcogenides,due to the smaller electron affinity of tellurium than that of sulfur and selenium,which is attributed to its metalloid *** some new potential strategies were developing with the increasing demand of CT-SNCs,the cation exchange reaction(CER)has particularly become a new strategy to synthesize highquality CT-SNCs and their corresponded *** review summarizes the synthesis strategies of CT-SNCs,including traditional methods and new methods with emphasis on CERs,and their resulting CTSNCs with well-controlling size,shape,composition,crystallization and hetero-interfaces *** progressive synthesis methods give rise to the excellent optical properties of *** review also covers the recent progress of their applications in the field of photoelectric detection,catalysis,batteries and *** new hybrid CT-SNCs nanostructures are also emphasized and systematically discussed due to their enhanced properties.

关键词： Telluride semiconductor nanocrystals Cation exchange reaction Quantum dots Optoelectronic application

A novel Z-scheme CeO_(2)/g-C_(3)N_(4)heterojunction photocatalyst for degradation of Bisphenol A and hydrogen evolution and insight of the photocatalysis mechanism

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Journal of Materials Science & Technology 2021年第26期85卷 18-29页

作者： Wei Zhao Tiantian She Jingyi Zhang Guoxiang Wang Sujuan Zhang Wei Wei Gang Yang Lili Zhang Dehua Xia Zhipeng Cheng Haibao Huang Dennis Y.C.Leung School of Geography School of EnvironmentNanjing Normal UniversityNanjing210000China Jiangsu Collaborative Innovation Center of Regional Modern Agriculture&Environmental Protection School of Chemistry and Chemical EngineeringHuaiyin Normal UniversityHuaian223001China School of Materials Engineering Changshu Institute of TechnologyChangshu215500China Department of Mechanical Engineering The University of Hong Kong999077Hong KongChina School of Environmental Science and Engineering Sun Yat-Sen UniversityGuangzhou510000China Huaibei Normal University Huaibei235000China

CeO_(2)/g-C_(3)N_(4)heterojunction photocatalyst had been successfully fabricated through a one-step in-situ pyrolysis formation of 3D hollow CeO_(2)mesoporous nanospheres and 2D g-C_(3)N_(4)nanosheets together with simultaneous removal of carbon sphere templates after heat *** sample shows high catalytic performances for photocatalytic hydrogen generation and photocatalytic oxidation of Bisphenol A(BPA)under visible light irradiation,and the catalytic degradation route of BPA was suggested by the degradation products determined by *** enhancing catalytic activity was attributed to the effective interfacial charge migration and ***,it was proposed that the CeO_(2)/g-C_(3)N_(4)heterojunction photocatalyst could follow a more appropriate Z-scheme charge transfer mechanism,which was confirmed by the analysis of experiment and theoretical calculation results.

关键词： Heterojunction Photocatalysts Hydrogen generation Charge separation

Users'experience matter:Delay sensitivity-aware computation offloading in mobile edge computing

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Digital Communications and Networks 2022年第6期8卷 955-963页

作者： Mingzhi Wang Tao Wu Tao Ma Xiaochen Fan Mingxing Ke National University of Defense Technology Hefei230031China Consulting Center for Strategic Assessment Academy of Military ScienceBeijing100091China

As a promising computing paradigm,Mobile Edge Computing(MEC)provides communication and computing capability at the edge of the network to address the concerns of massive computation requirements,constrained battery capacity and limited bandwidth of the Internet of Things(IoT)*** existing works on mobile edge task ignores the delay sensitivities,which may lead to the degraded utility of computation offloading and dissatisfied *** this paper,we study the delay sensitivity-aware computation offloading by jointly considering both user's tolerance towards delay of task execution and the network status under computation and communication ***,we use a specific multi-user and multi-server MEC system to define the latency sensitivity of task offloading based on the analysis of delay distribution of task ***,we propose a scoring mechanism to evaluate the sensitivity-dependent utility of task execution and devise a Centralized Iterative Redirection Offloading(CIRO)algorithm to collect all information in the MEC *** starting with an initial offloading strategy,the CIRO algorithm enables IoT devices to cooperate and iteratively redirect task offloading decisions to optimize the offloading strategy until it *** simulation results show that our method can significantly improve the utility of computation offloading in MEC systems and has lower time complexity than existing algorithms.

关键词： Mobile edge computing Computation floading Delay sensitivity Centralized ofloading

Tuning electroluminescence performance in Pr-doped piezoelectric bulk ceramics and composites

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Journal of Materiomics 2021年第2期7卷 264-270页

作者： Hailing Sun Manchung Wong Guofu Zhou K.W.Kwok Guangdong Provincial Key Laboratory of Optical Information Materials and Technology&Institute of Electronic Paper Displays South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China Department of Applied Physics The Hong Kong Polytechnic UniversityKowloonChina

Alternating current electroluminescence(ACEL)shows great potential in lighting,display and intelligent ***,the ACEL properties of Pr3þ-doped Ba0$85Ca0$15Ti0$90Zr0$10O3 ceramic and its PDMS-based composite have been *** red EL emission was obtained in the ceramic sample whereas blue EL emission of Pr3þwas observed for the first time in the composite *** red EL emission should be attributed to the impact of hot electrons driven by the large piezoelectric electric *** to the cross-relaxations through the 4f5d levels and Pr-to-metal charge transfer state,the 3 PJ emissions were completely quenched,and thus leading to an enhancement in red ***,external E field induced a large local piezoelectric deformation of the ceramic particles embedded in the PDMS matrix,which in turn caused a bending of CB and then a downwards shift of the 4f5d levels from the *** the cross-relaxations were hindered,and the blue EL emission was observed in the *** results would attract attention of functional materials studies and expand our understanding of such facile structure and oxide EL devices to facilitate their use in integral part of flexible device systems.

关键词： Electroluminescence Emission color tuning Ferroelectric. Piezoelectric Doping

Novel insights into stress-induced susceptibility to influenza:corticosterone impacts interferon-βresponses by Mfn2-mediated ubiquitin degradation of MAVS

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Signal Transduction and Targeted Therapy 2020年第1期5卷 782-793页

作者： Zhuo Luo Li-Fang Liu Ying-Nan Jiang Lu-Ping Tang Wen Li Shu-Hua Ouyang Long-Fang Tu Yan-Ping Wu Hai-Biao Gong Chang-Yu Yan Shan Jiang Yu-Hui Lu Tongzheng Liu Zhenyou Jiang Hiroshi Kurihara Yang Yu Xin-Sheng Yao Yi-Fang Li Rong-Rong He Guangdong Engineering Research Center of Chinese Medicine&Disease Susceptibility Jinan UniversityGuangzhou 510632China International Cooperative Laboratory of Traditional Chinese Medicine Modernization and Innovative Drug Development of Chinese Ministry of Education(MOE) College of PharmacyJinan UniversityGuangzhou 510632China Guangdong Province Key Laboratory of Pharmacodynamic Constituents of TCM and New Drugs Research College of PharmacyJinan UniversityGuangzhou 510632China School of Traditional Chinese Materia Medica Shenyang Pharmaceutical UniversityShenyang 110016China Institute of Tumor Pharmacology College of PharmacyJinan UniversityGuangzhou 510632China Department of Microbiology and Immunology Basic Medicine CollegeJinan UniversityGuangZhou 510632China

Although stress has been known to increase the susceptibility of pathogen infection,the underlying mechanism remains *** this study,we reported that restraint stress dramatically enhanced the morbidity and mortality of mice infected with the influenza virus(H1N1)and obviously aggravated lung ***(CORT),a main type of glucocorticoids in rodents,was secreted in the plasma of stressed *** further found that this stress hormone significantly boosted virus replication by restricting mitochondrial antiviral signaling(MAVS)protein-transduced IFN-βproduction without affecting its mRNA level,while the deficiency of MAVS abrogated stress/CORT-induced viral susceptibility in ***,the effect of CORT was mediated by proteasome-dependent degradation of MAVS,thereby resulting in the impediment of MAVS-transduced IFN-βgeneration in vivo and in ***,RNA-seq assay results indicated the involvement of Mitofusin 2(Mfn2)in this ***-and loss-offunction experiments indicated that Mfn2 interacted with MAVS and recruited E3 ligase SYVN1 to promote the polyubiquitination of ***-immunoprecipitation experiments clarified an interaction between any two regions of Mfn2(HR1),MAVS(C-terminal/TM)and SYVN1(TM).Collectively,our findings define the Mfn2-SYVN1 axis as a new signaling cascade for proteasome-dependent degradation of MAVS and a‘fine tuning’of antiviral innate immunity in response to influenza infection under stress.

关键词： influenza ubiquitin MAVS

A stage-specific cell-manipulation platform for inducing endothelialization on demand

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National Science Review 2020年第3期7卷 629-643页

作者： Qilong Zhao Juan Wang Yunlong Wang Huanqing Cui Xuemin Du Institute of Biomedical& Health Engineering Shenzhen Institutes of Advanced TechnologyChinese Academy of Sciences

Endothelialization is of great significance for vascular remodeling, as well as for the success of implanted vascular grafts/stents in cardiovascular disease treatment. However, desirable endothelialization on synthetic biomaterials remains greatly challenging owing to extreme difficulty in offering dynamic guidance on endothelial cell(EC) functions resembling the native extracellular matrix-mediated effects. Here, we demonstrate a bilayer platform with near-infrared-triggered transformable topographies, which can alter the geometries and functions of human ECs by tunable topographical cues in a remote-controlled manner, yet cause no damage to the cell viability. The migration and the adhesion/spreading of human ECs are respectively promoted by the temporary anisotropic and permanent isotropic topographies of the platform in turn, which appropriately meet the requirements of stage-specific EC manipulation for endothelialization. In addition to the potential of promoting the development of a new generation of vascular grafts/stents enabling rapid endothelialization, this stage-specific cell-manipulation platform also holds promise in various biomedical fields, since the needs for stepwise control over different cell functions are common in wound healing and various tissue-regeneration processes.

关键词： biomaterials tissue engineering shape-memory polymer topographical conversion endothelialization

Ferroelectricity in dopant-free HfO_(2) thin films prepared by pulsed laser deposition

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Journal of Materiomics 2022年第2期8卷 311-318页

作者： Yongjian Luo Zhenxun Tang Xiaozhe Yin Chao Chen Zhen Fan Minghui Qin Min Zeng Guofu Zhou Xingsen Gao Xubing Lu Jiyan Dai Deyang Chen Jun-Ming Liu Institute for Advanced Materials South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China Guangdong Provincial Key Laboratory of Optical Information Materials and Technology South China Academy of Advanced OptoelectronicsSouth China Normal UniversityGuangzhou510006China Department of Applied Physics The Hong Kong Polytechnic UniversityHung HomKowloonHong KongChina Laboratory of Solid State Microstructures and Innovation Center of Advanced Microstructures Nanjing UniversityNanjing210093China

As a high-k material,hafnium oxide(HfO_(2))has been used in gate dielectrics for *** the discovery of polar phase in Si-doped HfO_(2) films,chemical doping has been widely demonstrated as an effective approach to stabilize the ferroelectric phase in HfO_(2) based thin ***,the extra capping layer deposition,post-growth annealing and wake-up effect are usually required to arouse the ferroelectricity in HfO_(2) based thin films,resulting in the increase of complexity for sample synthesis and the impediment of device *** this study,the ferroelectricity is observed in non-capped dopant-free HfO_(2) thin films prepared by pulsed laser deposition(PLD)without post-growth *** adjusting the deposited temperature,oxygen pressure and thickness,the maximum polarization up to 14.7 m C/cm^(2) was obtained in 7.4 nm-thick *** fraction of orthorhombic phase,concentrations of defects and size effects are considered as possible mechanisms for the influences of ferroelectric *** study indicates that PLD is an effective technique to fabricate high-quality ferroelectric HfO_(2) thin films in the absence of chemical doping,capping layer deposition and post-growth annealing,which may boost the process of nonvolatile memory device application.

关键词： Hafnium oxide Pulsed laser deposition Ferroelectricity Orthorhombic phase