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solvothermal-assisted morphology evolution of nanostructured LiMnPO_4 as high-performance lithium-ion batteries cathode

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Journal of Materials Science & Technology 2018年第9期34卷 1544-1549页

作者： Chongjia Zhu Zhiqiu Wu Jian Xie Zhen Chen Jian Tu Gaoshao Cao Xinbing Zhao State Key Laboratory of Silicon Materials School of Materials Science and Engineering Zhejiang University Hangzhou 310027 China Key Laboratory of Advanced Materials and Applications for Batteries of Zhejiang Province Hangzhou 310027 China LI-FUN Technology Corporation Limited Zhuzhou 412000 China

As a potential substitute for LiFePO4, LiMnPO4 has attracted more and more attention due to its higher energy, showing potential application in electric vehicle（EV） or hybrid electric vehicle（HEV）. In this work,solvothermal method was used to prepare nano-sized LiMnPO4, where ethylene glycol was used as solvent, and lithium acetate（LiAc）, phosphoric acid（H3 PO4） and manganese chloride（MnCl2） were used as precursors. The crystal structure and morphology of the obtained products were characterized by X-ray diffraction, scanning electron microscopy and transmission electron microscopy. The electrochemical performance was evaluated by charge-discharge cycling, cyclic voltammetry and electrochemical impedance spectroscopy. The results show that the molar ratio of LiAc：H3 PO4：MnCl2 plays a critical role in directing the morphology of LiMnPO4. Large plates transform into irregular nanoparticles when the molar ratio changes from 2：1：1 to 6：1：1. After carbon coating, the product prepared from the 6：1：1 precursor could deliver discharge capacities of 156.9,122.8, and 89.7 mAhg-1 at 0.05 C, 1 C and 10 C, *** capacity retention can be maintained at 85.1% after 200 cycles at 1 C rate for this product.

关键词： Lithium manganese phosphate Cathode solvothermal reaction Lithium-ion battery Electrochemical performance

solvothermal-induced construction of ultra-tiny Fe_(2)O_(3) nanoparticles/graphene hydrogels as binder-free high-capacitance anode for supercapacitors

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Rare Metals 2021年第12期40卷 3520-3530页

作者： Shun-Hua Jiang Jian Ding Rong-Hua Wang Fu-Yu Chen Jing Sun Ying-Xiong Deng Xin-Lu Li School of Materials Science and Engineering Chongqing UniversityChongqing 400030China State Key Laboratory of High Performance Ceramics and Superfine Microstructure Shanghai Institute of CeramicsChinese Academy of SciencesShanghai 200050China

Three-dimensional(3D) ultra-tiny Fe_(2)O_(3) nanoparticles/graphene hydrogels were prepared using a facile and efficient solvothermal reaction, by which the phase of iron oxide, particle size and the morphology of hydrogels can be precisely controlled by simply adjusting the solvothermal reaction time. Accordingly, the effect of the microstructures of hydrogels on electrochemical performance was systematically studied. It was found that Fe_(2)O_(3)/r GO-50 hydrogels(with a solvothermal reaction time of 50 min) possessed a desirable crystallinity, suitable particle size, decent porous structure, large specific surface area and high electrical conductivity, thus exhibiting a superior electrochemical performance as binder-free anode of supercapacitors: a large potential range of 1.15 V, an ultrahigh specific capacitance of 1090 F·g^(-1) at a current density of 2A·g^(-1) and excellent rate capability (531 F·g^(-1) at 10 A·g^(-1)). The rational design and systematic research of electrode materials will provide new lights for the preparation of advanced electrochemical energy storage devices.

关键词： Iron oxide Graphene hydrogels solvothermal reaction Binder-free electrode Supercapacitors

Synthesis and Structure of a 3D Manganese Coordination Polymer with 1,3-Bis(benzimidazol-1-ylmethyl)-2,4,6-trimethylbenzene and 1,5-Naphthalenedisulfonate

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Chinese Journal of Structural Chemistry 2007年第8期26卷 929-932页

作者： ZHOU Hui DU Shao-Wu LI Zhi-Hua State Key Laboratory of Structural Chemistry Fujian Institute of Research on the Structure of Matter The Chinese Academy of Sciences Fuzhou Fujian 350002 China

The organic-inorganic hybrid polymer [Mn（mbbimb）2（1,5-nds）]n 1 has been synthesized using 1,5-naphthalenedisulfonate （1,5-nds） and 1,3-bis（benzimidazol-1-ylmethyl）- 2,4,structure analysis indicates that 1 crystallizes in monoclinic, space group C2/c with a=21.3546（17）, b=11.8841（7）, c=22.1588（16）A, β=108.058（3）°, C60H54MnN8O6S2, Mr=1102.17, Z=4, V=5346.5（7）A^3, Dc=1.369 g/cm^3, μ=0.386 mm^-1, F（000）=2300, S=1.091, R=0.0634 and wR=0.1559 for 4641 observed reflections （I 〉 2σ（I））. The Mn center is six-coordinated to furnish a distorted octahedral geometry, and the overall framework is a 6-connected 3D net.

关键词： solvothermal reaction organic-inorganic polymer 6-connected 3D net manganese complex

Influence of the Metal Ions on the Allylic Rearrangement Reac- tion of 3,4,5,6-Tetrahydrophthalic Anhydride

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Chinese Journal of Chemistry 2015年第12期33卷 1347-1352页

作者： Yuanchao Pang Yanzhen Zheng Center for Applied Chemical Research Frontier Institute of Science and Technology and MOE Key Laboratory for Nonequilibrium Synthesis and Modulation of Condensed Matter College of Science Xi'an Jiaotong University Xi'an Shannxi 710054 China

To further investigate the influence of metal ions on the allylic rearrangement of 3,4,5,6-tetrahydrophthalic an- hydride during the hydrothermal reaction, metal ions such as manganese（Ⅱ）, zinc（Ⅱ） and cadmium（Ⅱ） have been employed in the synthesis, which leads to the formation of three new lamellar coordination polymers, [MnⅡs（μ3-OH）3（1-chec）（1,2-chedc）（2,3-chedc）2（H20）] （3Mn）, [ZnⅡs（μ3-OH）3（1-chec）（1,2-chedc）（2,3-chedc）2（H20）] （4Zn）, and [CdⅡ3（μ3-OH）2（1,2-chedc）2] （5Cd）（1-chec=cyclohexene-l-carboxylate, 1,2-chedc=cyclohexene-1,2- dicarboxylate, 2,3-chedc=cyclohexene-1,2-dicarboxylate）. Interestingly, the allylic rearrangement reaction is metal-dependent, which occurs only in 3Mn and 4Zn, resulting in the formation of one chiral carbon atom of the corresponding dicarboxylate ligands in both compounds. In addition, the magnetic property of compound 3Mn was studied, which revealed strong antiferromagnetic interactions between the metal centers.

关键词： metal-dependent allylic rearrangement solvothermal reaction antiferromagnetic interaction

Adsorption and Visible Light Photocatalytic Degradation of Electrospun PAN@W_(18)O_(49) Nanofibers

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Chemical Research in Chinese Universities 2021年第3期37卷 428-435页

作者： MA Yuying HE Dayong LIU Jiadi WANG Yuannan YANG Mei WANG Hao QIU Ju LI Wenyan LI Yongxin WANG Ce Alan G.MacDiarmid Institute College of ChemistryJilin UniversityChangchun130012P.R.China College of Plant Science Jilin UniversityChangchun130062P.R.China College of New Energy and Environment Jilin UniversityChangchun130021P.R.China

Low density and high porosity polyacrylonitrile(PAN)nanofibers prepared by electrospinning were used as brackets for photocatalyst W_(18)O_(49) to prepare a kind of light weight and easy recycling water purification material for the first *** influence of tungsten source concentration on the formation of W_(18)O_(49) during a solvothermal process was systematically *** prepared PAN@W_(18)O_(49) nanofibers(NFs)utilize the outstanding visible light photocatalytic performance and the adsorption performance of W_(18)O_(49),and at the same time give the advantages of low density and easy *** pollutant removal performance of the composite nanofibers was investigated by using five contaminants including rhodamine B(RhB),methylene blue(MB),malachite green(MG),methyl orange(MO)and chlortetracycline(CTC)as *** them,the degradation process of rhodamine B has been studied in *** five cycles,the degradation efficiency did not decrease significantly,showing excellent reusability of PAN@W_(18)O_(49) ***,the adsorption performance of PAN@W_(18)O_(49) NFs during the photocatalytic process was also studied in *** with recently reported literature,the degradation efficiency of organic pollutants by PAN@W_(18)O_(49) NFs showed better performance,and PAN@W_(18)O_(49) NFs felt had a promising prospect in the field of degradation of contaminants.

关键词： Photocatalysis Adsorption Electrospinning solvothermal reaction Dye degradation

Cadmium(Ⅱ) Nitrite Complex Based on the Bis(2-benzimidazole) and Aromatic Carboxylate Ligands

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Chinese Journal of Structural Chemistry 2012年第4期31卷 529-534页

作者：姜娈冯国栋陈强杨得锁李宗孝罗小林 Department of Chemistry and Chemical Engineering Baoji University of Arts and Sciences

A new cadmium（Ⅱ） nitrite complex Cd2（H2C3PIm）2（BDC）（NO2）2（1,H2C3PIm = 2,2＇-（1,3-propanediyl）bis（1H-benzimidazole）,H2BDC = 1,4-benzenedicarboxylic acid） has been synthesized by solvothermal reaction in formamide,and its structure（C42H36Cd2N10O8,Mr = 1033.61） was determined by single-crystal X-ray diffraction *** crystal belongs to the monoclinic system,space group P21/n with a = 0.9859（5）,b = 0.8936（5）,c = 2.3188（5） nm,β = 97.576（5）°,V = 2.025（16） nm3,Z = 2,Dc = 1.695 g/cm3,μ（MoKα） = 1.118 mm-1,F（000） = 1036,S = 1.017,the final R = 0.0304 and wR = 0.0752 for 3761 reflections with I 〉 2σ（I）.The centrosymmetric complex 1 contains a dimer in which two distorted octahedral Cd（II） centers are bridged by BDC ligand and chelated by *** units of the complex are linked via weak N-H···O hydrogen bonds between the nitrito and the BDC ligands,leading to the formation of a 1D zigzag chain along the b *** π-π packing interactions contribute to the formation of a three-dimensional supramolecular *** complex exhibits strong photoluminescence at room temperature.

关键词： solvothermal reaction crystal structure cadmium(Ⅱ) bis(2-benzimidazoles) nitrite

Synthesis of CdS Nanowires on Cd Foil and Their Photoluminescence Properties

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Wuhan University Journal of Natural Sciences 2011年第3期16卷 241-244页

作者： LI Ling LIU Xiaolan LIU Xiaoli ZHOU Li Key Laboratory of Artificial Micro- and Nano-Structures of Ministry of Education/School of Physics and Technology Wuhan University Wuhan 430072 Hubei China

Cadmium sulfide （CdS） nanowires were synthesized on Cd foil via a simple solvothermal reaction at 180℃ using thiosemicarbazide as the sulfide source and ethylenediamine as the solvent. The CdS nanowires are hexagonal-phase single crystals with an average diameter of 50 nm and length of several microns. The as-prepared CdS nanowires show an absorption peak of around 483 nm in the absorption spectrum. The CdS nanowires exhibit bright photoluminescence （PL） with two distinct emission bands at 503 nm and 697 nm, which shows that the as-prepared CdS nanowires are high-quality nanocrystals.

关键词： CdS nanowires Cd foil photoluminescence solvothermal reaction

Crystal structures and characterization of two Mn(Ⅱ) 2-sulfoterephthalate complexes from multi-pyridine ligands

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Crystal structures and characterization of two Mn(Ⅱ) 2-sulf...

Two Novel 2D Metal-Organic Frameworks Based on 2,2’-Bibenzimidazole Ligand with （6,3） Net Topology

中国化学会第九届全国无机化学学术会议

作者： Ren Yi-Xia An Miao Chai Hong-Mei Fu Feng Gao Lou-Jun Department of Chemistry Faculty of ScienceXi’an Jiao Tong University College of Chemistry and Chemical Engineering Shaanxi Key Laboratory of Chemical Reaction Engineering Yan’an University

solvothermal reaction of Manganese(Ⅱ)salt with monosodium 2-sulfoterephthalate(2-Na H2stp)and two multi-pyridine N-containing auxiliary ligands results in the formation of two new complexes formulated with[Mn2(Hstp)2(bpp)2(H2O)4](1)and[Mn3(stp)2(tpy)3(H2O)](H2O)5(2)(bpp=benz-2,3-pyrimidine-[2,3-f]-1,10-phenanthroline,tpy=2,2’:6’,2’’-Terpyridine).X-ray diffraction structural analyses of two complexes reveal their structural diversity(0D and1D)due to the difference of auxiliary ligands.1 is a discrete structure in which Mn(Ⅱ)ion is hexa-coordinated with one stp,one bpp ligand and two water *** 2 is a one-dimension(1D)chain-like structure with three crystallographically independent Mn(Ⅱ)ions as shown in *** two complexes were characterized by IR,TG,UV and FS techniques.

关键词： solvothermal reaction structural diversity photoluminescent properties

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Two Novel 2D Metal-Organic Frameworks Based on 2,2’-Bibenzi...