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Novel ternary Ag/CeVO_4/g-C_3N_4 nanocomposite as a highly efficient visible-light-driven ph.t.catalyst

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Journal of Advanced Ceramics 2018年第1期7卷 50-57页

作者： J.rEN Y.Z.WU J.m.PAN x.h.yan m.chen J.J.wang D.f.wang C.ZhOU Q.wang x.N.chenG School of materials Science and Engineering Jiangsu University Institute for Advanced materials Jiangsu University Institute of Green materials and metallurgy Jiangsu University

the CeVO_4/graph.t.c C_3N_4 composites have exhibited much enhanced ph.t.catalytic property for degrading methylene blue(mB) pollutant under visible light irradiation compared with single-phase g-C_3N_4 or CeVO_4. the composite S5 obtained from an optimized mass ratio(5%) of CeVO_4 to dicyanamide(DCDA) exhibits the highest ph.t.catalytic activity. here, ternary Ag/CeVO_4/g-C_3N_4 composites denoted as x%Ag/S5 were prepared by an ultrasonic precipitation method to improve the ph.t.catalytic property of S5. the tEm images show th.t.CeVO_4 and Ag nanoparticles are well distributed on the layered g-C_3N_4, which agree well with.t.e xrD results. the UV spectra show th.t.the 7%Ag/S5 sample has the widest absorption range and the enhanced absorption intensity under visible light irradiation. the corresponding band gap of 7%Ag/S5(2.5 eV) is much lower than th.t.of S5(2.65 eV). the corresponding k value of 7%Ag/S5 is much higher than those of g-C_3N_4 and CeVO_4. the degradation experiments for mB solution suggest th.t.the 7%Ag/S5 sample has the optimal ph.t.catalytic performance, which can degrade mB solution completely within 120 min. the enhanced ph.t.catalytic property of the composites is ascribed to not only the effect of h.t.rojunction structure, but also the surface plasma resonance effect of Ag nanoparticles.

关键词： g-C3N4 CeVO4 Ag nanocomposites ph.t.catalytic performance

Solid-state alloying of Al-mg alloys by accumulative roll-bonding:microstructure and properties

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Journal of materials Science & technology 2022年第30期125卷 238-251页

作者： x.m.mei Q.S.mei J.Y.Li C.L.Li L.Wan f.chen Z.h.chen t.xu Y.C.wang Y.Y.tan School of Power and mechanical Engineering Wuhan UniversityWuhan 430072China Key Laboratory of hydraulic machinery transients(Wuhan University) Ministry of EducationWuhan 430072China School of mechanical Engineering Wuhan Polytechnic UniversityWuhan 430023China

In this study,a novel solid-state alloying approach was adopted to fabricate Al-mg alloys with high mg contents(C_(mg)) by accumulative roll-bonding(ArB)of Al and mg elemental materials to ultrahigh *** results showed th.t.the degree of alloying increased with.t.e increase of ArB cycles and a supersaturatedα-Al solid solution accompanied with nanoprecipitates was formed in the Al-mg alloys by ArB to 70 *** as-prepared Al-mg alloys exhibited enhanced mechanical properties,with a maximum tensile strength of∼615 mPa and a tensile elongation of∼10%at C_(mg)=13 wt.%.the high strength can be attributed to different mechanisms,namely solid solution strengthening,grain boundary strengthening,dislocation strengthening,and precipitation *** Al-mg alloys showed increased work hardening with increasing C_(mg),due to the enhanced formation of ***,no obvious drop in the intergranular corrosion(IGC)resistance was found in the Al-mg alloys with C_(mg) up to 13 wt.%.moreover,sensitization treatment was found to induce little decrease in the IGC resistance of the Al-mg alloys with C_(mg)≤13 wt.%.We found th.t.the excellent IGC resistance was due to the suppression of grain boundary precipitation by the preferred formation of precipitates within the grains th.t.were induced by *** study indicated the novelty of the present solid-state alloying approach.t. achieving a superior combination of high mechanical properties and IGC resistance in Al-mg alloys.

关键词： Solid-state alloying Al-mg alloys mechanical properties IGC resistance ArB

microstructure and mechanical properties of mg-to-Al dissimilar welded joints with an Ag interlayer using ultrasonic spot welding

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Journal of magnesium and Alloys 2020年第2期8卷 552-563页

作者： h.Peng D.L.chen x.f.Bai P.Q.wang D.Y.Li x.Q.Jiang College of Engineering and technology Southwest UniversityTiansheng Road 2Beibei DistrictChongqing 400715China Department of mechanical and Industrial Engineering Ryerson University350 Victoria StreetTorontoOntario M5B 2K3Canada School of materials and Energy Southwest UniversityTiansheng Road 2Beibei DistrictChongqing 400715China Department of Chemical and materials Engineering University of AlbertaEdmontonAlberta T6G 1H9Canada

Lightweight ZEK100-0 mg alloy and A16022-t43 Al alloy with an Ag interlayer were joined via ultrasonic spot welding(USW),focusing on the microstructural change and tensile lap shear strength of the welded joints in relation to welding ***/Al interface was superseded by mg/Ag and Al/Ag interfaces,and unfavorable mg门A-intermetallic compound was *** foil was observed to be intact in the nugget center,while it was broken or dissolved at the nugget edge at high welding energy *** diffusion layer at the mg/Ag interface consisted of two distinctive sub-layers:mg3Ag intermetallic compound adjoining Ag foil,and mg3Ag-l-mg eutectic structure adjacent to *** a thin diffusion layer consisting mainly of Ag3Al occurred al lhe Al/Ag *** tensile lap shear strength first increased,reached its peak value,and then decreased with increasing welding *** shear strength achieved in the present study was〜31%higher than th.t.of the joint without *** failure occurred at all energy levels,with Ag foil particles or fragments being stuck on both mg and Al sides due to its intense interaction with mg and Al via accelerated diffusion during *** results obtained pave the way for the challenging dissimilar welding between mg and Al alloys.

关键词： magnesium alloy Aluminum alloy Ultrasonic spot welding Ag interlayer microstructure tensile lap shear strength

Convergence of the viscosity solution of non-autonomous hamilton-Jacobi equations

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Science China mathematics 2021年第8期64卷 1789-1800页

作者： Cui chen Ya-Nan wang Jun yan the faculty of Science Jiangsu UniversityZhenjiang 212013China School of mathematical Sciences Nanjing Normal UniversityNanjing 210097China School of mathematical Sciences Fudan UniversityShanghai 200433China Shanghai Key Laboratory for Contemporary Applied mathematics Shanghai 200433China

In this paper,we investigate the non-autonomous hamilton-Jacobi equation{ə_(t)u+h.t.x,ə_(x)=0,u(x,t)_(0))=φ(x),x∈m where h is 1-periodic with respect to t and m is a compact riemannian manifold without *** obtain the viscosity solution denoted by t_(t_(0))^(t)φ(x)and show t_(t_(0))^(t)φ(x)converges uniformly to a time-periodic viscosity solution u^(*)(x,t)ofə_(t)u+h.t.x,ə_(x)u,u)=0.

关键词： hamilton-Jacobi equation viscosity solution large-time behavior

mICrOBrIDGE tEStING Of YOUNG'S mODULUS AND rESIDUAL StrESS Of NICKEL fILm ELECtrOPLAtED ON SILICON WAfEr

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Acta metallurgica Sinica(English Letters) 2004年第3期17卷 247-254页

作者： Y.Zhou C.S.yang J.A. chen G.f. Ding L. wang m.J wang Y.m Zhang t.h Zhang Key Laboratory for thin film and microfabrication of ministry of Education Research Institute of Micro/Nanometer Science and Technology Shanghai Jiaotong University Shanghai 200030 China State Key Laboratory of Nonlinear mechanics (LNm) Institute of Mechanics The Chinese Academy of Sciences Beijing 100080 China.

microbridge testing is used to measure the Young's modulus and residual stresses of metallic *** film microbridges with widths of several hundred microns are fabricated by microelectromechanical *** order to measure the mechanical properties of nickel film microbridges,special shaft structure is designed to solve the problem of getting the load--deflection curves of metal film microbridge by Nanoin--denter xP system with normal Berkovich *** analysis of the micro--bridge load--deflection curve is proposed to evaluate the Young's modulus and residual stress of the films *** calculated results based on the experimental measurements show th.t.the average Young's modulus and residual stress are around 190GPa and 175mPa respectively,while the Young's modulus measured by Nano-hardness method on nickel film with silicon substrate is 186.8±7.34GPa.

关键词： nickel film microbridge mEmS mechanical property loadeflection measurement

the Lobster Eye Imager for Astronomy Onboard the SAtech-01 Satellite

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research in Astronomy and Astrophysics 2023年第9期23卷 66-78页

作者： Z.x.Ling x.J.Sun C.Zhang S.L.Sun G.Jin S.N.Zhang x.f.Zhang J.B.Chang f.S.chen Y.f.chen Z.W.cheng W.fu Y.x.han h.Li J.f.Li Y.Li Z.D.Li P.r.Liu Y.h.Lv x.h.ma Y.J.tang C.B.wang r.J.xie Y.L.xue A.L.yan Q.Zhang C.Y.Bao h.B.Cai h.Q.cheng C.Z.Cui Y.f.Dai D.W.fan h.B.hu J.W.hu m.h.huang Z.Q.Jia C.C.Jin D.Y.Li J.Q.Li h.Y.Liu m.J.Liu Y.Liu h.W.Pan Y.L.Qiu m.Sugizaki h.Sun W.x.wang Y.L.wang Q.Y.Wu x.P.xu Y.f.xu h.N.yang x.yang B.Zhang m.Zhang W.D.Zhang Z.Zhang D.h.Zhao x.Q.Cong B.W.Jiang L.h.Li x.B.Qiu J.N.Sun D.t.Su J.wang C.Wu Z.xu x.m.yang S.K.Zhang Z.Zhang N.Zhang Y.f.Zhu h.Y.Ban x.Z.Bi Z.m.Cai W.chen x.chen Y.h.chen Y.Cui x.L.Duan Z.G feng Y.Gao J.W.he t.he J.J.huang f.Li J.S.Li t.J.Li t.t.Li h.Q.Liu L.Liu r.Liu S.Liu N.meng Q.Shi A.t.Sun Y.m.wang Y.B.wang h.C.Wu D.x xu Y.Q yang Y.yang x.S.Yu K.x.Zhang Y.L.Zhang Y.h.Zhang Y.t.Zhang h.Zhou x.C.Zhu J.S.cheng L.Qin L.wang Q.L.wang m.Bai r.L.Gao Z.Ji Y.r.Liu f.L.ma Y.J.Shi J.Su Y.Y.tan J.Z.tong h.t.xu C.B.xue G.f.xue W.Yuan National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China School of Astronomy and Space Science University of Chinese Academy of SciencesBeijing 100049China Shanghai Institute of technical Physics Chinese Academy of SciencesShanghai 200083China North Night Vision technology Co. LTDNanjing 211106China Institute of high Energy Physics Chinese Academy of SciencesBeijing 100049China Science and technology on Low-Light-Level Night Vision Laboratory Xi'an 710065China Innovation Academy for microsatellites Chinese Academy of SciencesShanghai 201204China Institute of Electrical Engineering Chinese Academy of ScienceBeijing 100190China National Space Science Center Chinese Academy of ScienceBeijing 100190China

the Lobster Eye Imager for Astronomy(LEIA),a pathfinder of the Wide-field x.r.y telescope of the Einstein Probe mission,was successfully launched onboard the SAtech-01 satellite of the Chinese Academy of Sciences on2022 July *** this paper,we introduce the design and on-ground test results of the LEIA *** stateof-the-art micro-Pore Optics(mPO),a wide field of view of 346 square degrees(18.6°×18.6°)of the x.r.y imager is *** optical assembly composed of 36 mPO chips is used to focus incident x.r.y ph.t.ns,and four large-format complementary metal-oxide semiconductor(CmOS)sensors,each of size 6 cm×6 cm,are used as the focal plane *** instrument has an angular resolution of 4’-8’(in terms of fWhm.f.r the central focal spot of the point-spread function,and an effective area of 2-3 cm^(2) at 1 keV in essentially all the directions within the field of *** detection passband is 0.5-4 keV in soft x.r.ys and the sensitivity is2-3×10^(-11) erg s^(-1) cm^(-2)(about 1 milliCrab)with a 1000 s *** total weight of LEIA is 56 kg and the power is 85 *** satellite,with a design lifetime of 2 yr,operates in a Sun-synchronous orbit of 500 km with an orbital period of 95 *** is paving the way for future missions by verifying in flight the technologies of both novel focusing imaging optics and CmOS sensors for x.r.y observation,and by optimizing the working setups of the instrumental *** addition,LEIA is able to carry out scientific observations to find new transients and to monitor known sources in the soft x.r.y band,albeit with limited useful observing time available.

关键词： instrumentation detectors-space vehicles instruments-telescopes-x.r.ys genera

Geometrical reconstruction of fluorescence events observed by the LhAASO experiment

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Chinese Physics C 2021年第4期45卷 416-425页

作者： f.Aharonian Q.An Axikegu L.x.Bai Y.x.Bai Y.W.Bao D.Bastieri x.J.Bi Y.J.Bi h.Cai J.t.Cai Z.Cao Z.Cao J.Chang J.f.Chang x.C.Chang B.m.chen J.chen L.chen L.chen L.chen m.J.chen m.L.chen Q.h.chen S.h.chen S.Z.chen t.L.chen x.L.chen Y.chen N.cheng Y.D.cheng S.W.Cui x.h.Cui Y.D.Cui B.Z.Dai h.L.Dai Z.G.Dai Danzengluobu D.della Volpe B.DEtorre Piazzoli x.J.Dong J.h.fan Y.Z.fan Z.x.fan J.fang J.fang C.f.feng L.feng S.h.feng Y.L.feng B.Gao C.D.Gao Q.Gao W.Gao m.m.Ge L.S.Geng G.h.Gong Q.B.Gou m.h.Gu J.G.Guo x.L.Guo Y.Q.Guo Y.Y.Guo Y.A.han h.h.he h.N.he J.C.he S.L.he x.B.he Y.he m.heller Y.K.hor C.hou x.hou h.B.hu S.hu S.C.hu x.J.hu D.h.huang Q.L.huang W.h.huang x.t.huang Z.C.huang f.Ji x.L.Ji h.Y.Jia K.Jiang Z.J.Jiang C.Jin D.Kuleshov K.Levochkin B.B.Li C.Li C.Li f.Li h.B.Li h.C.Li h.Y.Li J.Li K.Li W.L.Li x.Li x.Li x.r.Li Y.Li Y.Z.Li Z.Li Z.Li E.W.Liang Y.f.Liang S.J.Lin B.Liu C.Liu D.Liu h.Liu h.D.Liu J.Liu J.L.Liu J.L.Liu J.S.Liu J.Y.Liu m.Y.Liu r.Y.Liu S.m.Liu W.Liu Y.N.Liu Z.x.Liu W.J.Long r.Lu h.K.Lv B.Q.ma L.L.ma x.h.ma J.r.mao A.masood W.mitthumsiri t.montaruli Y.C.Nan B.Y..Pang P.Pattarakijwanich Z.Y.Pei m.Y.Qi D.ruffolo V.rulev A.Saiz L.Shao O.Shchegolev x.D.Sheng J.r.Shi h.C.Song Yu.V.Stenkin V.Stepanov Q.N.Sun x.N.Sun Z.B.Sun P.h.t.tam Z.B.tang W.W.tian B.D.wang C.wang h.wang h.G.wang J.C.wang J.S.wang L.P.wang L.Y.wang r.N.wang W.wang W.wang x.G.wang x.J.wang x.Y.wang Y.D.wang Y.J.wang Y.P.wang Z.wang Z.wang Z.h.wang Z.x.wang D.m.Wei J.J.Wei Y.J.Wei t.Wen C.Y.Wu h.r.Wu S.Wu W.x.Wu x.f.Wu S.Q.xi J.xia J.J.xia G.m.xiang G.xiao h.B.xiao G.G.xin Y.L.xin Y.xing D.L.xu r.x.xu L.xue D.h.yan C.W.yang f.f.yang J.Y.yang L.L.yang m.J.yang r.Z.yang S.B.yang Y.h.Yao Z.G.Yao Y.m.Ye L.Q.Yin N.Yin x.h.You Z.Y.You Y.h.Yu Q.Yuan h.D.Zeng t.x.Zeng W.Zeng Z.K.Zeng m.Zha x.x.Zhai B.B.Zhang h.m.Zhang h.Y.Zhang J.L.Zhang J.W.Zhang L.Zhang L.Zhang L.x.Zhang P.f.Zhang P.f.Zhang r.Zhang S.r.Zhang S.S.Zhang x.Zhang x.P.Zhang Y.Zhang Y.Zhang Y.f.Zhang Y.L.Zhang B.Zhao J.Zhao L.Zhao L.Z.Zhao S.P.Zhao f.Zheng Y.Zheng B.Zhou h.Zhou J.N.Zhou P Key Laboratory of Particle Astrophyics&Experimental Physics Division&Computing Center Institute of High Energy PhysicsChinese Academy of SciencesBeijing 100049China University of Chinese Academy of Sciences Beijing 100049China tIANfU Cosmic ray research Center ChengduSichuanChina State Key Laboratory of Paricle Detection and Electronics China University of Science and technology of China HefeiAnhui 230026China Department of Engineering Physics Tsinghua UniversityBeijing 100084China National Astronomical Observatories Chinese Academy of SciencesBeijing 100101China National Space Science Center Chinese Academy of SciencesBeijing 100190China School of Physics Peking UniversityBeijing 100871China Center for Astrophysics Guangzhou UniversityGuangzhouGuangdong 510006China School of Physics and Astronomy&School of Physics(Guangzhou) Sun Yat-sen UniversityZhuhaiGuangdong 519000China School of Physical Science and technology Guangxi UniversityNanningGuangxi 530004China hebei Normal University ShijiazhuangHebei 050024China School of Physics and microelectronics Zhengzhou UniversityZhengzhouHenan 450001China School of Astronomy and Space Science Nanjing UniversityNanjingJiangsu 210023China Key Laboratory of Dark matter and Space Astronomy Purple Mountain ObservatoryChinese Academy of SciencesNanjingJiangsu 210023China Institute of frontier and Interdisciplinary Science Shandong UniversityQingdaoShandong 266237China Key Laboratory for research in Galaxies and Cosmology Shanghai Astronomical ObservatoryChinese Academy of SciencesShanghai 200030China tsung-Dao Lee Institute&School of Physics and Astronomy Shanghai Jiao Tong UniversityShanghai 200240China School of Physical Science and technology Southwest Jiaotong UniversityChengduSichuan 610031China College of Physics Sichuan UniversityChengduSichuan 610065China Key Laboratory of Cosmic rays(tibet University) Ministry of EducationLhasaTibet 850000China School of physics and technology Wuhan UniversityWuhanHubei 430072Ch

the LhAASO-WfCtA experiment,which aims to observe cosmic rays in the sub-EeV range using the fluorescence technique,uses a new generation of high-performance *** ensure th.t.the experiment has ex-cellent detection capability associated with.t.e measurement of the energy spectrum,the primary composition of cosmic rays,and so on,an accurate geometrical reconstruction of air-shower events is *** paper de-scribes the development and testing of geometrical reconstruction for stereo viewed events using the WfCtA(Wide field of view Cherenkov/fluorescence telescope Array)*** approaches,which.t.ke full advantage ofthe WfCtA *** *** is the stereo-angular method,which uses the pointing of triggered SiPms in the shower trajectory,and the other is the stereo-timing method,which uses the triggering time of the fired *** results show th.t.both methods have good geometrical resolution:the resolution of the stereo-timing method is slightly better than the stereo-angular method because the resolution of the latter is slightly limited by the shower track length.

关键词： cosmic ray fluorescence telescope stereo observation geometrical reconstruction

he-enhanced h.t.rogeneity of radiation-induced segregation in feNiCoCr high-entropy alloy

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Journal of materials Science & technology 2022年第6期101卷 226-233页

作者： W.t.Lin G.m.Yeli G.wang J.h.Lin S.J.Zhao D.chen S.f.Liu f.L.meng Y.r.Li f.he Y.Lu J.J.Kai Department of mechanical Engineering City University of Hong KongHong KongChina Institute of Nuclear&New Energy technology Tsinghua UniversityBeijingChina Department of Physics Southern University of Science and TechnologyShenzhenChina Centre for Advanced Nuclear Safety and Sustainable Development City University of Hong KongHong KongChina School of Environmental Science and Engineering Southern University of Science and TechnologyShenzhenChina School of materials Science and Engineering Shanghai UniversityShanghaiChina Nano-manufacturing Laboratory(NmL) City University of Hong Kong Shenzhen Research InstituteShenzhenChina

radiation-induced segregation(rIS) is a typical non-equilibrium process th.t.can dramatically alter the behavior of defect sinks and material properties under irradiation. however, rIS mechanisms have been rarely studied around small he bubbles owing to the technical challenges involved in direct measurements of local chemistry. here, using state-of-the-art atom probe tomography, we report the rIS behavior near he bubbles in the fe Ni Co Cr high-entropy alloy th.t.indicates Co segregates most strongly, followed by weaker Ni segregation, whereas fe and Cr are depleted almost to the same degree. Exceptionally, the magnitude of Co segregation around he bubbles is higher than previously measured values at voids and dislocation loops. Electron energy-loss spectroscopy was used to measure the he density and pressure inside individual bubbles. We demonstrate th.t.he bubbles are over-pressurized at the irradiation temperature th.t.could result in the vacancy bias and the subsequent vacancy-dominated rIS ***-principles calculations further reveal th.t.there are repulsive interactions between he and Co atoms th.t.may reduce the frequency of Co-vacancy exchange. As a result, he atoms likely retard Co diffusion via the vacancy mechanism and enhance the h.t.rogeneity of rIS in Co-containing multicomponent alloys. these insights could provide the basis for understanding he effects in nuclear materials and open an avenue for tailoring the local chemical order of medium-and high-entropy alloys.

关键词： high-entropy alloy radiation-induced segregation he bubbles Atom probe tomography Electron energy-loss spectroscopy

Selected aptamer specially combing 5-8f cells based on automatic screening instrument

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Chinese Chemical Letters 2022年第9期33卷 4208-4212页

作者： Zhukang Guo Baijiang Jin Yile fang yan Deng Zhu chen hui chen Song Li franklin wang-Ngan Chow Polly h.m.Leung hanming wang Lei Cai Nongyue he State Key Laboratory of Bioelectronics School of Biological Science and Medical EngineeringSoutheast UniversityNanjing 210096China hunan Key Laboratory of Biomedical Nanomaterials and Devices Hunan University of TechnologyZhuzhou 412007China Department of health.t.chnology and Informatics The Hong Kong Polytechnic UniversityHong KongChina Guangzhou Wondfo Biotech Co. Ltd.Guangzhou 510641China Guangzhou Wondfo iCubate Biotech Co. Ltd.Guangzhou 510641China

Since the concept of aptamer emerged,many scientists have launched a rich field of research around ***,few nucleic acids aptamer which use cell as target can be put into practical *** believe th.t.a great deal of this lies in the complexity and irreproducibility of aptamer screening experiments *** complexity is due to the cumbersome processes and the technical requirements for laboratory personnel,whereas irreproducibility arises from the fact th.t.the starting point of such screens is nucleic acid libraries with random.f.agments,and th.t.different libraries directly determine the differences or even the success or failure of screening *** complexity and irreproducibility mentioned above,in turn,lead to the inability of this experiment to unfold on a large scale,which naturally cannot lead to excellent results for practical *** response to this problem,our group has developed an instrument for automated screening of tumor cell nucleic acid aptamers and characterized the properties of nucleic acid aptamers obtained using this instrument in a comprehensive manner.

关键词： Aptamer Cell-SELEx Automatic instrument tumor Efficient screening