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Surfactant-enhanced electrochemical detection of bisphenol A based on Au on ZnO/reduced graphene oxide sensor

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Rare Metals 2023年第4期42卷 1274-1282页

作者： Ai-Yun zha Qing-Bing zha Zhi Li Hong-min zha.g Xue-Feng Ma Wen Xie ming-Shan Zhu Department of Nephrology The First Affiliated Hospital of Jinan UniversityGuangzhou510630China Department of Clinical Laboratory The Fifth Affiliated Hospital of Jinan University(Heyuan Shenhe People’s Hospital)Heyuan517000China Department of Obstetrics and gynecology The First Affiliated Hospital of Jinan UniversityGuangzhou510630China guangdong Key Laboratory of Environmental Pollution and Health School of EnvironmentJinan UniversityGuangzhou511443China

Bisphenol A(BPA),one of the most commonly used plastic organic monomers,is widely used in manufacturing food packaging and ***,the gradual emissions of BPA from manufacturing plastic products bring great potential in human health threats,which urgently need to develop a simple and rapid method for detecting *** bromide(CTAB),a typical surfactant,is used to enhance the electrochemical detection of trace endocrine disruptors due to the fact that it can effectively enrich and absorb hydrophobic phenolic compounds through the hydrophobicity of its long-chain *** on these,the present study reports a ternary composite of Au on zinc oxide/reduced graphene oxide nanosheets(Au/ZnO/rgO)as electrochemical sensor for detecting BP *** the addition of CTAB,the analytic performances toward BP A detection are significantly improved 3.8 times compared with those without *** pH,accumulation potential and time are ***,the electrochemical activity of CTAB/Au/ZnO/rgO sensor is also evaluated by cyclic voltammetry(CV),electrochemical impedance spectroscopy(EIS),differential pulse voltammetry(DPV)and scan *** sensor displays two linear range from 10to 1340 nmol·L^(-1)and 1340 to 10,000 nmol·L^(-1),and a low detection limit of 4.95 nmol·L^(-1).Lastly,the sensor also exhibits good reproducibility,selectivity and potential practical application for BPA detection in real samples.

关键词： Bisphenol A(BPA) Cetyltrimethylammonium bromide(TAB) Electrochemical detection(ED) Electron transmission

Microstructure evolution and stress rupture properties of K4750 alloys with various B contents during long-term aging

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Journal of Materials Science & Technology 2021年第14期73卷 108-115页

作者： Xiaoxiao Li Meiqiong Ou min Wang Xiang dong zha Yingche Ma Kui Liu Institute of Metal Research Chinese Academy of SciencesShenyang110016China School of Materials Science and Engineering University of Science and Technology of ChinaHefei230026China

The relationship among B content,microstructure evolution and stress rupture properties of K4750 alloy during long-term aging were *** aging at 800℃for 1000 h,the decomposition degree of MC carbides of K4750 alloys with 0 B,0.007 wt.%B and 0.010 wt.%B were basically identical,which indicated that B has no inhibition on MC carbide decomposition during long-term *** MC carbide decomposition was accompanied by the formation of M_(23)C_(6) carbides and a small number ofηphases,which was controlled by the outward diffusion of C and Ti combined with the inward diffusion of Ni and Cr from theγ*** addition,M_(23)C_(6) carbides in boron-free alloy were in continuous chain and needle-likeηphases were precipitated near them,while M_(23)C_(6) carbides in boron-containing alloys remained in granular distribution and noηphases precipitation around *** B could delay the agglomeration and coarsening of M_(23)C_(6) carbides during long-term aging,which was because the segregation of B at grain boundary retarded the diffusion of alloy elements,thus weakened the local fluctuation of chemical composition near grain *** stress rupture samples of K4750 alloys with various B contents after aging at 800℃for 1000 h were tested at 750℃/380 *** results indicated that the stress rupture properties of bo ron-containing alloys were significantly better than that of boron-free alloy,which could be attributed to the increase of grain boundary cohesion strength and the optimization of M_(23)C_(6) carbide distribution due to the addition of B.

关键词： Nickel-based superalloy Boron additions Long-term aging grain boundary segregation Stress rupture properties

Selective laser melted AZ91D magnesium alloy with superior balance of strength and ductility

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Journal of Magnesium and Alloys 2023年第12期11卷 4644-4658页

作者： Xinzhi Li Xuewei Fang Shuaipeng Wang Siqing Wang min zha Ke Huang State Key Laboratory for Manufacturing Systems Engineering School of Mechanical EngineeringXi’an Jiaotong UniversityXi’an 710049ShaanxiPR China School of Materials Science and Engineering Jilin UniversityChangchunPR China

In the context of global carbon neutrality, the application of lightweight magnesium alloys is becoming increasingly attractive. In this study, selective laser melting(SLM) was employed to achieve nearly full dense and crack-free AZ91D components with fine equiaxed grain structure. The formation mechanism of typical pore defects(gas pore, lack-of-fusion pore and keyhole pore) and melting modes(keyhole mode and conduction mode) were systematically studied by varying the laser power and scanning speed. The morphology and volume fraction of the pores under different processing conditions were characterized. A criterion based on the depth-to-width ratio of the melt pool was established to identify different melting modes. The strength and ductility(tensile strength up to 340 MPa and uniform elongation of 8.9%)of the as deposited AZ91D are far superior to those of the casting components and are comparable to those of its wrought *** superior balance of strength and ductility of SLMed AZ91D, as well as the negligible anisotropic properties are mainly ascribed to the extremely fine equiaxed grain structure(with average grain size of ~1.2 μm), as well as the discontinuous distribution of β-Al_(12)Mg_(17) phases. It thus provides an alternative way to fabricate high-strength magnesium alloys with complex geometry.

关键词： Magnesium alloy Selective laser melting Melting mode Defects Equiaxed grain structure Mechanical properties

Synthesis of a kind of geminal imidazolium ionic liquid with long aliphatic chains

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Chinese Chemical Letters 2007年第1期18卷 48-50页

作者： Yun Sheng Ding min zha Jun zha.g Seng Shan Wang Department of Polymer Materials and Engineering School of Chemical Engineering Hefei University of Technology Hefei 230009 China CAS Key Laboratory of Engineering Plastics Joint Laboratory of Polymer Science and Materials Institute of Chemistry Chinese Academy of Sciences Beijing 100080 China

A novel geminal imidazolium ionic liquid with long hydrocarbon group, 1,4-bis （3-tetradecylimidazolium- 1-yl） butane bromide was synthesized and an efficient synthesized method was introduced detailedly. Its structu... 详细信息

关键词： geminai imidazolium ionic liquid Long aliphatic chain Physicochemicai properties

Theoretical analysis and application of polymer-matrix field grading materials in HVDC cable terminals

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High Voltage 2017年第1期2卷 39-46页

作者： Peng Han Jun-Wei zha Si-Jiao Wang Zhi-min Dang Department of Polymer Science and Engineering University of Science and Technology BeijingBeijing 100083People’s Republic of China State Key Laboratory of Power System and Department of Electrical Engineering Tsinghua UniversityBeijing 100084People’s Republic of China

The distortion and uneven distribution of electric field in high-voltage direct current(HVDC)terminal insulator is the key problem for stable running of the power transmission *** flexible materials filled polymer-matrix composites with non-linear conductivity have also been considered to modify the distribution of electric field in cable *** factors having influence on the non-linear conductivity will be analysed in this review.

关键词： field conductivity matrix

Effects of Silicon on the Microstructure and Mechanical Properties of 15–15Ti Stainless Steel

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Acta Metallurgica Sinica(English Letters) 2020年第11期33卷 1583-1590页

作者： Hao-Yu Yi Tian Liang min Wang Xiang-Dong zha Ying-Che Ma Kui Liu China Nuclear Power Technology Research Institute Shenzhen 518000China Key Laboratory of Nuclear Materials and Safety Assessment Institute of Metal ResearchChinese Academy of SciencesShenyang 110016China

Effects of silicon on the microstructure and mechanical properties of 20% cold-worked 15-15 Ti austenitic stainless steels are systemically investigated by uniaxial tensile tests,scanning and transmission electron microscope observations,and strength *** results reveal that a large number of deformation twins are formed in the 20% cold-worked steels with various silicon *** volume fraction of deformation twins and the density of dislocations increase with silicon content,while the twin thickness slightly decreases.A better strength-ductility combination is achieved by silicon addition,since the yield strength of the steel with 2% silicon is 61 MPa higher than that of the steel with 1% silicon,while their uniform elongations are almost both equal to 16%.The yield strength of the 15-15 Ti stainless steels is predominantly contributed by the solid solution,dislocation and deformation twin strengthening effects,which can be enhanced by silicon addition.

关键词： Austenitic stainless steel Silicon Microstructure Mechanical property

Constructing a Maximally Entangled Seven-Qubit State via Orthogonal Arrays

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Chinese Physics Letters 2020年第9期37卷 6-9页

作者： Xin-Wei zha min-Rui Wang Ruo-Xu Jiang School of Science Xi'an University of Posts and TelecommunicationsXi'an 710121China

Huber et al.[***.118(2017)200502]have proved that a seven-qubit state whose three-body marginal states are all maximally mixed does not ***,we propose a method to build a maximally entangled state based on orthogonal arrays to construct maximally entangled seven-qubit *** this method,we not only determine that a seven-qubit state whose three-body marginals are all maximally mixed does not exist,but also find the condition for maximally entangled seven-qubit *** consider thatπME=19/140 is a condition for maximally entangled seven-qubit ***,we derive three forms of maximally entangled seven-qubit states via orthogonal arrays.

关键词： states. maximal states

Bimodal microstructure – A feasible strategy for high-strength and ductile metallic materials

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Journal of Materials Science & Technology 2018年第2期34卷 257-264页

作者： min zha Hong-min zha.g Zhi-Yuan Yu Xuan-He zha.g Xiang-Tao Meng Hui-Yuan Wang Qi-Chuan Jiang State Key Laboratory of Automotive Simulation and Control Jilin University Key Laboratory of Automobile Materials of ministry of Education & School of Materials Science and Engineering Nanling Campus Jilin University

Introducing a bimodal grain-size distribution has been demonstrated an efficient strategy for fabricating high-strength and ductile metallic materials, where fine grains provide strength, while coarse grains enable strain hardening and hence decent ductility. Over the last decades, research activities in this area have grown enormously, including interesting results onfcc Cu, Ni and Al-Mg alloys as well as steel and Fe alloys via various thermo-mechanical processing approaches. However, investigations on bimodal Mg and other hcp metals are relatively few. A brief overview of the available approaches based on thermo- mechanical processing technology in producing bimodal microstructure for various metallic materials is given, along with a summary of unusual mechanical properties achievable by bimodality, where focus is placed on the microstructure-mechanical properties and relevant mechanisms. In addition, key factors that influencing bimodal strategies, such as compositions of starting materials and processing parameters, together with the challenges this research area facing, are identified and discussed briefly.

关键词： Nanocrystalline and ultrafine-grained metals Mechanical milling Severe plastic deformation Bimodal microstructure Strength and ductility

Efficient scheme for remote preparation of arbitrary n-qubit equatorial states

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Chinese Physics B 2020年第4期29卷 160-164页

作者： Xin-Wei zha min-Rui Wang Ruo-Xu Jiang School of Science Xi'an University of Posts and TelecommunicationsXi'an 710121China

Recently,a scheme for deterministic remote preparation of arbitrary multi-qubit equatorial states was proposed by Wei et al.[Quantum ***.1770(2018)].It is worth mentioning that the construction of mutual orthogonal measurement basis plays a key role in quantum remote state *** this paper,a simple and feasible remote preparation of arbitrary n-qubit equatorial states scheme is *** our scheme,the success probability will reach ***,there are no coefficient constraint and auxiliary qubits in this *** means that the success probabilities are independent of the coefficients of the entangled *** advantage of our scheme is that the mutual orthogonal measurement basis is *** accomplish the quantum remote state preparation(RSP)schemes,some new sets of mutually orthogonal measurement basis are introduced.

关键词： mutual orthogonal measurement basis remote state preparation equatorial states success probability