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Hydrothermal Synthesis and Crystal Structure of Iron Molybdophosphate Fe[Mo_6O_(12)(OH)_3(H_2PO_4)(HPO_4)_2(PO_4)]_2- [Fe(2,2′-bipy)(H_2O)_2]_2[Fe(2,2′-bipy)_3]_2·6H_2O

作者： GAO Si-ze NI Bang-fa ZHANG Gui-ying XIAO Cai-jin liu Cun-xiong CHEN Zhe NIE Peng liu Chao ZHAO Chang-jun College of Physics Science and Engineering Technology Guangxi University

This system is designed to pick up sound signals from large volume,low-threshold energy, low-background superheated droplets bubble detectors.A sound-sensitive bubble detector is composed of a container filled with a mixture of superheated droplets and gel,a temperature and pressure control system,and an audio acquisition system attached on the outer surface of the *** superheated droplets are in a metastable and superheated state at ambient temperature and *** the outside

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Chinese Journal of Structural Chemistry 2005年第10期24卷 1117-1122页

作者： GUO Hong-Xu liu Shi-xiong Department of Chemistry Fuzhou University Fuzhou 350002 China Department of Chemistry Zhangzhou Teachers College Zhangzhou 363000 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

A molybdenum（V） phosphate supported by iron coordination complexes, Fe[Mo6O12（OH）3（H2PO4）（HPO4）2（PO4）]2[Fe（2,2′-bipy）（H2O）2]2[Fe（2,2′-bipy）3]2·6H2O （bipy = 2,2′-bipyridine） 1, has been synthesized by hydrothermal synthesis and characterized. The title complex crystallizes in the monoclinic system, space group P21/c with a = 14.0005（8）, b = 25.5229（12）, c = 17.9956（9） A, β = 103.470（2）°, V= 6253.5（6） A^3, Z= 2, Mr = 4114.03, Dc = 2.185 g/cm^3, F（000） = 4040, μ = 1.931 mm^-1, R = 0.0438 and wR = 0. 1168. The structure of the title polyoxometalate anion is based on a centrosymmetrical cluster Fe[Mo6O2（OH）3（H2PO4）（HPO4）2（PO4）]2 supported by two [Fe（2,2′-bipy）（H2O）2] subunits. The 2D network is formed through intermolecular hydrogen bonds.

关键词： molybdophosphate iron complex hydrothermal synthesis crystal structure

Bilayer solid-electrolyte interphase structure enables a 440 Wh kg^(-1) lithium metal pouch cell to achieve 130 cycles

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Science China Chemistry 2024年第3期67卷 751-752页

作者： xiong liu Chaojiang Niu School of Materials Science and Engineering Zhengzhou UniversityZhengzhou 450001China

Lithium(Li) metal has been considered one of the most promising anodes due to its high theoretical capacity, lightweight and low electrochemical potential. The cell-level energy density of rechargeable lithium metal batteries(LMBs) is expected to surpass 500 Wh kg^(-1) after replacing the graphite anode in lithium-ion batteries [1].

关键词： lithium electrolyte layer

A Novel Three-dimensional Inorganic Open-framework Constructed from [Mo_4O_(16)]_n ^(8n-) Chains Linked through Ag^+

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Chinese Journal of Structural Chemistry 2005年第12期24卷 1452-1456页

作者： GUO Hong-Xu liu Shi-xiong Department of Chemistry Fuzhou University Fuzhou 350002 China Department of Chemtstry Zhangzhou Teacher＇s College Zhangzhou 363000 China State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou 350002 China

A novel 3-D inorganic bimetallic compound Ag2Mo2O7 has been hydrothermally synthesized and structurally characterized by X-ray diffraction. The compound crystallizes in monoclinic, space group P21/c with a = 6.1274（3）, b = 13.1836（6）, c = 7.8780（3）A, β= 110.673（3）°, V = 595.42（5）A3, Z= 4, Mr= 519.62, Dc = 5.797g/cm^3, F（000） = 936,μ（MoKα） = 10.579 mm^-1, F（000） = 936, the final R = 0.0204 and wR = 0.0477 for 1268 observed reflections with I〉 2σ（I）. In the title compound, the [Mo4O16]n^8n-chains are linked through O-Ag-O bridging bonds to form a 3D network. It represents an unprecedented linking mode between the isopolyoxomolybdate chain and the transition metal oxide cluster. IR, TGA and fluorescence properties of the title compound are also studied.

关键词： polyoxomolybdate molybdenum(Ⅵ) open-framework hydrothermal synthesis crystal structure

Synthesis and Extended 3D Hydrogen-bonded Structure of Complex Tris(violurato-N,O) Cobalt(III) Hexahydrate

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Chinese Journal of Structural Chemistry 2006年第2期25卷 163-167页

作者： XIAO Zi-Jing liu Shi-xiong Central Laboratory Fuzhou University Fuzhou 350002 China College of Materials Science and Engineering Huaqiao University Quanzhou 362011 China State Key Laboratory of Structural Chemistry Fuzhou 350002 China

The cobalt（Ⅲ） violurato complex （[Co（C4H2N3O4）3]·6H2O, Mr = 635.28） has been prepared and structurally characterized. The crystal is of monoclinic, space group P2 1/n with a = 10.176（1）, b = 11.8010（9）, c = 19.706（2） A°, β= 97.382（3）°, V= 2346.9（4）A°^3, Z = 4, Dc= 1.798 g/cm^3, F（000） = 1296, μ = 0.839 mm^-1, R = 0.0482 and wR = 0.1357. The Co atom in the title compound is six- coordinated by three carbonyl O atoms and three oximido N atoms of three violurato ligands, forming an octahedral coordination geometry. The neighboring molecules are connected together by hydrogen bonds of N-H…O, O-H…O and O-H…N, forming an extended three-dimensional supra- molecular architecture.

关键词： Co(Ⅲ) complex violuric acid crystal structure hydrogen bond

Theoretical analysis of the coupling between Feshbach states and hyperfine excited states in the creation of 23Na40K molecule

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Chinese Physics B 2020年第2期29卷 218-223页

作者： Ya-xiong liu Bo Zhao Hefei National Laboratory for Physical Sciences at Microscale and Department of Modern Physics University of Science and Technology of ChinaHefei 230026China Shanghai Branch CAS Center for Excellence and Synergetic Innovation Center in Quantum Information and Quantum PhysicsUniversity of Science and Technology of ChinaShanghai 201315China

We present an intensive study of the coupling between different Feshbach states and the hyperfine levels of the excited states in the adiabatic creation of 23Na40K ground-state *** use coupled-channel method to calculate the wave function of the Feshbach molecules,and give the short-range wave function of triplet *** energies of the hyperfine excited states and the coupling strength between the Feshbach states and the hyperfine excited states are *** results can be used to prepare a specific hyperfine level of the rovibrational ground state to study the ultracold collisions involving molecules.

关键词： Feshbach resonance stimulated Raman adiabatic passage ultracold molecule

Convergence Analysis for the Chebyshev Collocation Methods to Volterra Integral Equations with a Weakly Singular Kernel

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Advances in Applied Mathematics and Mechanics 2017年第6期9卷 1506-1524页

作者： xiong liu Yanping Chen Hunan Key Laboratory for Computation and Simulation in Science and Engineering Department of MathematicsXiangtan UniversityXiangtanHunan 411105China School of Mathematical Sciences South China Normal UniversityGuangzhouGuangdong 510631China School of Mathematics and Statistics Lingnan Normal UniversityZhanjiangGuangdong 524048China

In this paper,a Chebyshev-collocation spectral method is developed for Volterra integral equations(VIEs)of second kind with weakly singular *** first change the equation into an equivalent VIE so that the solution of the new equation possesses better *** integral term in the resulting VIE is approximated by Gauss quadrature formulas using the Chebyshev collocation *** convergence analysis of this method is based on the Lebesgue constant for the Lagrange interpolation polynomials,approximation theory for orthogonal polynomials,and the operator *** spectral rate of convergence for the proposed method is established in the L^(∞)-norm and weighted L^(2)-*** results are presented to demonstrate the effectiveness of the proposed method.

关键词： Chebyshev collocation method Volterra integral equations spectral rate of convergence H¨older continuity

Enantioseparation of 3-chlorophenylglycine enantiomers using Mandyphos-Pd as chiral extractant

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Chinese Journal of Chemical Engineering 2021年第5期34卷 96-103页

作者： xiong liu Shuhuan Chen Yu Ma Wenjie Xiao School of Chemistry and Chemical Engineering Hunan University of Science and TechnologyXiangtan 411201China Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers Xiangtan 411201China

Chiral extractant plays a key role in chiral extraction,and considerable efforts have been undertaken for the development of new and efficient chiral extractants in recent *** work demonstrated for the first time that chiral ferrocenyl diphosphine ligand(Mandyphos-Pd)had considerable ability to enantioseparate 3-Chlorophenylglycine enantiomers with separation factor(α)of ***-Pd concentration and pH had significant influences on enantioselectivity,while operating temperature showed less *** extraction experiments can be performed at room temperature(20℃)which had the advantage of energy *** optimization,the highest performance factor(pf,0.08376)was obtained at the condition of pH 7.8 and Mandyphos-Pd concentration 1.2 mmol·L^(-1).According to the experimental results,the possible recognition mechanism was discussed.

关键词： Enantioseparation Mandyphos 3-Chlorophenylglycine Response surface method Recognition mechanism

Multi-color space threshold segmentation and self-learning k-NN algorithm for surge test EUT status identification

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Frontiers of Mechanical Engineering 2016年第3期11卷 311-315页

作者： Jian HUANG Gui-xiong liu School of Mechanical & Automotive Engineering South China University of Technology Guangzhou 510641 China

The identification of targets varies in different surge tests. A multi-color space threshold segmentation and self-learning k-nearest neighbor algorithm （k-NN） for equipment under test status identification was proposed after using feature matching to identify equipment status had to train new patterns every time before testing. First, color space （L＊a＊b＊, hue saturation lightness （HSL）, hue saturation value （HSV）） to segment was selected according to the high luminance points ratio and white luminance points ratio of the image. Second, the unknown class sample Sr was classified by the k-NN algorithm with training set T~ according to the feature vector, which was formed from number ofpixels, eccentricity ratio, compact- ness ratio, and Euler＇s numbers. Last, while the classification confidence coefficient equaled k, made Sr as one sample ofpre-training set Tz＇. The training set Tz increased to Tz＋1 by Tz＇ if Tz＇ was saturated. In nine series of illuminant, indicator light, screen, and disturbances samples （a total of 21600 frames）, the algorithm had a 98.65% identification accuracy, also selected five groups of samples to enlarge the training set from To to T5 by itself. Keywords multi-color space, k-nearest neighbor algorithm （k-NN）, self-learning, surge test

关键词： multi-color space k-nearest neighbor algorithm (k-NN) self-learning surge test

PVP-Assisted Synthesis of Self-Supported Ni_(2)P@Carbon for High-Performance Supercapacitor

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Research 2019年第1期2019卷 200-209页

作者： Qian He xiong xiong liu Rui Wu Jun Song Chen School of Materials and Energy University of Electronic Science and Technology of ChinaChengdu 611731China Center for Applied Chemistry University of Electronic Science and Technology of ChinaNo.2006Xiyuan Ave.West Hi-Tech ZoneChengduChina

Highly conductive and stable electrode materials are usually the focus of high-performance *** this work,a unique design of Ni_(2)P@carbon self-supported composite nanowires directly grown on Ni foam was applied for a *** Co3O4 nanowire array was first synthesized on the Ni foam substrate,and the resulting Ni_(2)P@carbon nanocomposite was obtained by hydrothermally coating Co_(3)O_(4) with the Ni-ethylene glycol complex followed by gaseous *** have discovered that the molecular weight of surfactant polyvinylpyrrolidone(PVP)used in the hydrothermal step,as well as the temperature for phosphorization,played very important roles in determining the electrochemical properties of the ***,the sample synthesized using PVP with 10 k molecular weight and phosphorized at 300℃ demonstrated the best supercapacitive performance among the different samples,with the highest capacitance and most stable cyclic *** an asymmetric supercapacitor(ASC)was assembled with this Ni_(2)P@carbon sample as the cathode and activated carbon(AC)as the anode,the ASC device showed excellent capacitances of 3.7 and 1.6 F cm^(-2) at 2 and 50 mA cm^(-2),respectively,and it kept a high capacitance of 1.2 F cm^(-2) after 5000 cycles at a current rate of 25 mA cm^(-2).In addition,the ASC could reach a high energy density of about 122.8 Wh kg^(-1) at a power density of 0.15 kW kg^(-1) and 53.3 Wh kg^(-1) at the highest power density of 3.78 kW kg^(-1).Additionally,this device also had the ability to power up 16 red LEDs effortlessly,making it a strong candidate in electrochemical energy storage for practical usage.

关键词： composite nanowires capacitance