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One-step hydrothermal synthesis of 2,5-PDCA-containing MgAl-LDHs three-layer composite coating with high corrosion resistance on AZ31
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作者 Fan Shi Jingmao Zhao +3 位作者 Mohammad Tabish Jingbao Wang Pu Liu Jiayu Chang 《Journal of Magnesium and Alloys》 SCIE EI CAS CSCD 2023年第7期2541-2557,共17页
The addition of 2,5-pyridinedicarboxylic acid(2,5-PDCA)to the Mg-Al LDH coating,which was prepared by one-step hydrothermal synthesis,had extremely enhanced the corrosion protection of AZ31 Mg alloy,although the 2,5-P... The addition of 2,5-pyridinedicarboxylic acid(2,5-PDCA)to the Mg-Al LDH coating,which was prepared by one-step hydrothermal synthesis,had extremely enhanced the corrosion protection of AZ31 Mg alloy,although the 2,5-PDCA could not be intercalated into the interlayer spacing.The corrosion current density of 0.05 mol L^(−1)2,5-PDCA LDH containing LDH coating is 3.18 nA cm^(−2),reduced by two orders of magnitude compared to the LDH coating without inhibitor,and the corrosion inhibition efficiency of the coating is 98.05%.The coating formed on the surface of AZ31 was peeled off from the substrate by using a mechanical method and SEM observation of the cross-section showed that the coating consisted of three different layers.The innermost layer is a thick layer that consists of Mg(OH)_(2)and the intermediate layer is LDH,which is vertical to the substrate and the outmost layer is a thin but very dense deposit layer of LDH agglomerates with complexes of 2,5-PDCA and Mg.This kind of sediment/LDH/Mg(OH)_(2)three-layer composite structure was accountable for the increase in the corrosion resistance of AZ31 Mg alloy. 展开更多
关键词 Three-layer composite coating hydrothermal synthesis 2 5-PDCA MgAl-LDHs PEELING
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Hydrothermal synthesis, characterization and optical properties of La_2Sn_2O_7:Eu^(3+) micro-octahedra 被引量:6
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作者 杨锦瑜 苏玉长 刘雪颖 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第3期535-543,共9页
Pyrochlore structure La2Sn2O7:Eu3+ microcrystals with uniform octahedron shape were successfully synthesized via a hydrothermal route at 180 °C for 36 h. The crystal structure, particle size, morphologies, and ... Pyrochlore structure La2Sn2O7:Eu3+ microcrystals with uniform octahedron shape were successfully synthesized via a hydrothermal route at 180 °C for 36 h. The crystal structure, particle size, morphologies, and optical properties of the as-synthesized products were investigated by XRD, TEM, SEM, EDS, FT-IR, Raman spectroscopy and PL. The effects of pH of precursor solution, precursor concentration, reaction temperature, and time were investigated. The results reveal that pH of the precursor solution not only plays an important role in determining the phase of the as-synthesized products, but also has a significant influence on the morphologies of the samples. High-quality and uniform octahedrons with an average size of about 700 nm could be easily obtained at the pH value of 12. The possible formation mechanism of octahedral-like La2Sn2O7:Eu3+ microcrystals was briefly proposed. The photoluminescence spectra show that La2Sn2O7:Eu3+ micro-octahedra display stronger emission in the range of 582-592 nm compared with the samples with other shapes. 展开更多
关键词 pyrochlore structure hydrothermal synthesis growth mechanism optical properties
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Hydrothermal synthesis of nanosized ZSM-22 and their use in the catalytic conversion of methanol 被引量:4
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作者 陈磊 卢鹏 +3 位作者 袁扬扬 徐力 张晓敏 许磊 《Chinese Journal of Catalysis》 SCIE EI CAS CSCD 北大核心 2016年第8期1381-1388,共8页
ZSM‐22 zeolite with different crystal lengths was prepared using a modified hydrothermal method. Rotation speed, Si/Al molar ratio and co‐solvent have important effects on the crystal size of ZSM‐22. The nanosized ... ZSM‐22 zeolite with different crystal lengths was prepared using a modified hydrothermal method. Rotation speed, Si/Al molar ratio and co‐solvent have important effects on the crystal size of ZSM‐22. The nanosized zeolite samples were characterized by X‐ray diffraction, X‐ray fluorescence, nitrogen adsorption, scanning electron microscopy, temperature‐programmed desorption of am‐monia and solid state nuclear magnetic resonance. The catalytic performance of nanosized ZSM‐22 was tested using the conversion of methanol. Compared to conventional ZSM‐22, the nanosized ZSM‐22 zeolite exhibited superior selectivity to ethylene and aromatics and lower selectivity to propylene. Stability against deactivation was clearly shown by the nanosized ZSM‐22 zeolite. A higher external surface area and smaller particle size make this nanosized ZSM‐22 zeolite attractive for catalytic applications. 展开更多
关键词 Nanosized ZSM-22 zeolite hydrothermal synthesis Conversion of methanol
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Hydrothermal synthesis of monodisperse Zn_(x)Cd_(1-x)S spheres and their photocatalytic properties 被引量:1
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作者 贾志方 王富民 辛峰 《Transactions of Nonferrous Metals Society of China》 SCIE EI CAS CSCD 2011年第8期1767-1772,共6页
Monodisperse ZnxCd1-xS spheres were successfully fabricated with a high yield by a facile hydrothermal route.The as-prepared samples were characterized by X-ray diffractometry,scanning electron microscopy and UV-vis d... Monodisperse ZnxCd1-xS spheres were successfully fabricated with a high yield by a facile hydrothermal route.The as-prepared samples were characterized by X-ray diffractometry,scanning electron microscopy and UV-vis diffusion reflectance spectroscopy.The results indicate that all the prepared samples have the same hexagonal wurtzite phase and exhibit good size uniformity and regularity.Degradation of rhodamine-B(RhB) was used to evaluate the photocatalytic activities of ZnxCd1-xS samples.Zn0.4Cd0.6S possessed the best photocatalytic activity and exhibited high stability during the reaction. 展开更多
关键词 monodisperse ZnxCd1-xS spheres hydrothermal synthesis solid solution photocatalytic activity
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Hydrothermal Synthesis and Crystal Structure of a Zinc Complex:[Zn_(2.5)(phen)(BDC)_2(OH)] (phen = 1,10-Phenanthroline, BDC = Benzene-1,4-dicarboxylic Acid) 被引量:10
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作者 王庆伟 李秀梅 史林芳 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2008年第1期11-14,共4页
A metal-organic coordination polymer [ZnE.s(phen)(BDC)2(OH)]2 (phen = 1,10- phenanthroline, BDC = benzene-1,4-dicarboxylic acid) 1 has been hydrothermally synthesized and structurally characterized by single-c... A metal-organic coordination polymer [ZnE.s(phen)(BDC)2(OH)]2 (phen = 1,10- phenanthroline, BDC = benzene-1,4-dicarboxylic acid) 1 has been hydrothermally synthesized and structurally characterized by single-crystal X-ray diffraction, elemental analyses and IR spectroscopy. The complex crystallizes in the triclinic system, space group PI with a = 11.199(2), b = 11.593(2), c = 11.865(3)/A, α= 99.330(1), β = 111.506(1), γ = 104.804(1)^o, V= 1328.4(5)A^3, Dc= 1.722 g/cm^3, Z = 1, Mr = 1377.82, F(000) = 692,μ(MoKa) = 2.306 mm^-1, S = 1.093, R= 0.0281 and wR = 0.0756 for 4179 observed reflections (I 〉 2σ(/)). The coordination polyhedron around Zn(II) can be described as a tetrahedron, trigonal bipyramid and octahedron. It is worth noting that the crystal structure of 1 is composed of tetranuclear zinc clusters linked by {ZnO6} units. 展开更多
关键词 zinc complex hydrothermal synthesis crystal structure tetranuclear zinc cluster
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Hydrothermal Synthesis,Crystal Structure and Electrochemical Properties of Complex Cu(α-Furacrylic acid)_2(phen) 被引量:11
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作者 李薇 李昶红 +1 位作者 杨颖群 匡云飞 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2007年第10期1228-1231,共4页
The title complex (C26H18CuN206, Mr= 517.96) has been synthesized by the reaction of α-furanacrylic acid with 1,10-phenanthroline (phen) in the solvent mixture of water and methanol. Crystal data: monoclinic, sp... The title complex (C26H18CuN206, Mr= 517.96) has been synthesized by the reaction of α-furanacrylic acid with 1,10-phenanthroline (phen) in the solvent mixture of water and methanol. Crystal data: monoclinic, space group C2/c with a = 2.2927(4), b = 1.01248(18), c = 1.05061(18) nm, β = 111.188(3)°, V= 2.274(7) nm^3, Dc = 1.513 g/cm^3, Z = 4, F(000) = 1060,μ = 1.007mm^-1, R = 0.0320 and ωR = 0.0781. The crystal structural analysis shows that the copper atom is coordinated with four oxygen atoms from two α-furacrylic acids and two nitrogen atoms from 1,10-phenanthroline, giving a distorted octahedral coordination geometry. The result of electrochemical analysis shows that the electron transfer in the electrode reaction is quasi-reversible. 展开更多
关键词 copper(Ⅱ) complex hydrothermal synthesis electrochemical property
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Hydrothermal Synthesis, Crystal Structure and Photoluminescent Property of a Zinc(II) Coordination Polymer Assembled by Phthalate and 4,4′-Bipyridine 被引量:6
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作者 LI Xiu-Mei WANG Qing-Wei +3 位作者 CUI Yun-Cheng LI Chuan-Bi WANG Ren-Zhang LIU Bo 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第5期621-625,共5页
A metal-organic coordination polymer {[Zn(Pht)(4,4'-bipy)(H2O)2]·2H2O}n (Pht = phthalate, 4,4'-bipy = 4,4'-bipyridine) 1 has been hydrothermally synthesized and characterized by elemental analysis, IR,... A metal-organic coordination polymer {[Zn(Pht)(4,4'-bipy)(H2O)2]·2H2O}n (Pht = phthalate, 4,4'-bipy = 4,4'-bipyridine) 1 has been hydrothermally synthesized and characterized by elemental analysis, IR, TG, fluorescence spectrum and single-crystal X-ray diffraction. Yellow crystals crystallize in the monoclinic system, space group P2/n, a = 7.6346(14), b = 11.316(2), c = 10.8133(19) ,A, β = 92.A.A,A.(3)°, V = 933.3(3) A^3, C18H20N2O8Zn, Mr = 457.73, Dc = 1.629 g/cm^3, F(000) = 472, Z = 2,μ(MoKa) = 1.367 mm^-1, the final R = 0.0323 and wR = 0.0821 for 1859 observed reflections (Ⅰ〉 2σ(Ⅰ)). The structure of 1 exhibits a two-dimensional bilayer framework formed by hydrogen bonding interactions. Furthermore, 1 shows yellow photoluminescent property at room temperature. 展开更多
关键词 hydrothermal synthesis crystal structure coordination polymer LUMINESCENCE
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High quality Sb-doped SnO2 electrodes with high oxygen evolution potential prepared by in situ hydrothermal synthesis method 被引量:7
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作者 Ai Sheng Huang Guo Hua Zhao Hong Xu Li 《Chinese Chemical Letters》 SCIE CAS CSCD 2007年第8期997-1000,共4页
High quality Sb-doped SnO2 electrode, with high oxygen evolution potential of 3.0 V, was successfully synthesized on the Ti substrates by in situ hydrothermal synthesis method.
关键词 Metallic oxide electrode hydrothermal synthesis Oxygen evolution reaction
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Hydrothermal Synthesis, Crystal Structure and Photoluminescent Property of a New Isophthalate- bridged Zinc(II) Polymer with One-dimensional Chain Structure: [Zn(ipt)(im)_2]_(2n)·3nH_2O (ipt = Isophthalate, im = Imidazole) 被引量:6
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作者 李秀梅 崔运成 +3 位作者 王庆伟 李传碧 王仁章 高广刚 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第4期481-484,共4页
A new metal-organic coordination polymer [Zn(ipt)(im)2]2n·3nH2O 1 has been obtained by using hydrothermal synthesis and characterized by elemental analysis, IR, TG, fluorescence spectrum and single-crystal X-... A new metal-organic coordination polymer [Zn(ipt)(im)2]2n·3nH2O 1 has been obtained by using hydrothermal synthesis and characterized by elemental analysis, IR, TG, fluorescence spectrum and single-crystal X-ray diffraction. The complex crystallizes in monoclinic, space group P2(1/n) with a = 10.653(3), b = 17.891(6), c = 10.743(4)A^°,β= 117.093(5)°, V= 1822.9(10) A^°3, Mr= 413.65, Dc = 1.507 g/cm^3,/t(MoKa) = 1.390 mm^-1, F(000) = 840, Z = 4, the final R = 0.0444 and wR = 0.1066 for 2434 observed reflections (I〉 2σ(I)). Furthermore, compound 1 shows blue photoluminescent property at room temperature. 展开更多
关键词 coordination polymer hydrothermal synthesis crystal structure luminescence
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Hydrothermal Synthesis and Characterization of a Novel Supramolecular Network Compound [Co(IN)_2(H_2O)_4](IN=Isonicotinate) 被引量:5
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作者 JIA Hong-bin YU Jie-hui +6 位作者 DING Hong XU Ji-qing YE Ling JING Wei-jieWANG Tie-gang XU Jia-ning QU Xue-jian LI Zeng-chun 《Chemical Research in Chinese Universities》 SCIE CAS CSCD 2002年第4期385-388,共4页
A novel supramolecular compound, [Co(IN)_2(H_2O)_4](1), was synthesized by means of the hydrothermal method and its structure was characterized with elemental analysis, FT-IR spectrum, TGA and X-ray diffraction. Thoug... A novel supramolecular compound, [Co(IN)_2(H_2O)_4](1), was synthesized by means of the hydrothermal method and its structure was characterized with elemental analysis, FT-IR spectrum, TGA and X-ray diffraction. Though the unit cell structure of the title compound is only monomeric, all these units as building blocks are assembled into a novel three-dimensional supramolecular network via the widely hydrogen-bonding and π-π stacking interactions. 展开更多
关键词 hydrothermal synthesis Cobalt(Ⅱ) complex X-Ray diffraction ISONICOTINATE SUPRAMOLECULE
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Hydrothermal synthesis of Y(OH)_3,Y(OH)_3:Eu^(3+) nanotubes and the photoluminescence of Y(OH)_3:Eu^(3+),Y_2O_3:Eu^(3+) 被引量:7
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作者 吴燕利 孙伟丽 +3 位作者 周雪珍 焦晓燕 丁家文 李永绣 《Journal of Rare Earths》 SCIE EI CAS CSCD 2009年第5期767-772,共6页
The phase and morphology transformation during the hydrothermal treating process of Y2O3 was evaluated with X-ray difference (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), particle ... The phase and morphology transformation during the hydrothermal treating process of Y2O3 was evaluated with X-ray difference (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), particle size and specific surface area determination. The results showed that the cubic Y2O3 did not transfer into hexagonal Y(OH)3 in pure water. Therefore, pure hexagonal Y(OH)3 with nanotube and microrod morphologies were obtained by hydrothermal treating Y2O3 at 150 oC for 12 h in 15 ml of 2 mol/L NaOH solution with and without PVA or PEG. It was suggested that the characteristic preferential growth of Y(OH)3 was attributed to the structure anisotropy of hexahedron Y(OH)3. The addition of PVA or PEG could promote the forming process of nanotubes by selective adsorption on different crystal planes, which altered the growth rate along different directions and resulted in the diffusion limit of constructing ions in the center top of rods. Finally, Y(OH)3:Eu and Y2O3:Eu nanotubes were also synthesized by using this method, and their photoluminescence properties were evaluated. 展开更多
关键词 hydrothermal synthesis Y(OH)3 Y(OH)3:Eu Y2O3:Eu NANOTUBE rare earths
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Hydrothermal Synthesis,Structure and Properties of a 3D Pillar-layered Metal-organic Framework Based on Amino-arenedisulfonate Ligand 被引量:6
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作者 关磊 罗贯华 王莹 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2018年第11期1795-1804,共10页
One novel metal-organic framework(MOF), [Ba(L)(HO)](1, HL =aniline-2,5-disulfonic acid), has been synthesized by hydrothermal method. Each barium atom is eleven-coordinated into a distorted monocapped pentagonal antip... One novel metal-organic framework(MOF), [Ba(L)(HO)](1, HL =aniline-2,5-disulfonic acid), has been synthesized by hydrothermal method. Each barium atom is eleven-coordinated into a distorted monocapped pentagonal antiprismatic arrangement. Compound 1 shows an interesting 3 D pillar-layered structure constructed from 2 D inorganic layers[Ba(SO)(HO)]and organic pillars of phenyl moieties of L2-linkages. The inorganic layers are supported by the organic pillars, generating a novel 3 D open framework structure with {3, 4~6, 5~5, 6~5,7~4}2{3}{5} topology. The result of fluorescence measurement can reveal that the decayed emission band centered at 492 nm may be caused by the interactions of the ligands and the metal ions.Compound 1 exhibits selective toward the adsorption of COover Nat 273 K. 展开更多
关键词 hydrothermal synthesis metal-organic framework pillar-layered structure coordination polymer
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Microwave Hydrothermal Synthesis PZT of Nanometer Crystal 被引量:4
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作者 Hongxing LIU, Hong DENG, Yan LI and Yanrong LIInstitute of Microelectronics and Solid State Electronics, University of Electronic Science and Technology of China, Chengdu 610054, China 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2004年第5期637-638,共2页
It was focused on the applications and developments of microwave hydrothermal synthesis piezoelectric ceramic powder. The microwave hydrothermal vessel was designed and manufactured. The microwave hydrothermal synthes... It was focused on the applications and developments of microwave hydrothermal synthesis piezoelectric ceramic powder. The microwave hydrothermal vessel was designed and manufactured. The microwave hydrothermal synthesis system was established and the PZT piezoelectric ceramic powder was synthesized. XRD and TEM have been used to characterize the products in detail. The diameter of the PZT powder particle is from 40 to 60 nm. 展开更多
关键词 Microwave hydrothermal synthesis Reaction vessel PZT
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Hydrothermal Synthesis, Crystal Structure and Electrochemical Properties of the Complex Cu(o-Methylbenzoic acid)_2(2,2′-bipy)·(H_2O) 被引量:6
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作者 HE Xiao-Mei LI Chang-Hong +1 位作者 YANG Ying-Qun LI Wei 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2007年第2期206-210,共5页
The title complex (C26H24CuN2O5, Mr = 508.01) has been synthesized by o-methylbenzoic acid, 2,2'-bipyridine (bipy) and copper perchlorate in the mixed solvent of water and methanol. It crystallizes in orthorhombi... The title complex (C26H24CuN2O5, Mr = 508.01) has been synthesized by o-methylbenzoic acid, 2,2'-bipyridine (bipy) and copper perchlorate in the mixed solvent of water and methanol. It crystallizes in orthorhombic, space group P212121 with a = 0.70814(10), b = 1.6953(3), c = 1.9539(3) nm, V= 2.3457(6) nm^3, De= 1.439 g/cm^3, Z = 4,μ = 0.971 mm^-1, F(000) = 1052, R = 0.0432 and wR = 0.0860. The structural determination shows that the copper atom is coordinated by three oxygen atoms from two o-methylbenzoic acids and one water molecule together with two nitrogen atoms from 2,2'-bipyridine, giving a distorted square-pyramidal coordination geometry. The cyclic voltammetric behavior of the complex is also discussed. 展开更多
关键词 copper(Ⅱ) complex hydrothermal synthesis electrochemical property
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Hydrothermal Synthesis,Crystal Structure and Thermal Stability of a Binuclear Copper(Ⅱ) Complex with 3-(Pyridin-2-yl)-1,2,4-triazole 被引量:7
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作者 李昶红 谭雄文 +1 位作者 李薇 杨颖群 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2011年第2期289-292,共4页
One novel binuclear copper(Ⅱ) complex [Cu 2 (Hpt) 2 (CO 3) 2 (H 2 O) 2 ]·H 2 O with copper carbonate and 3-(pyridin-2-yl)-1,2,4-triazole (Hpt) was hydrothermally synthesized and characterized by IR a... One novel binuclear copper(Ⅱ) complex [Cu 2 (Hpt) 2 (CO 3) 2 (H 2 O) 2 ]·H 2 O with copper carbonate and 3-(pyridin-2-yl)-1,2,4-triazole (Hpt) was hydrothermally synthesized and characterized by IR and X-ray diffraction analysis.The complex crystallizes in triclinic,space group P2 1 /n with a=0.6862(1),b=0.7805(1),c=1.1983(2) nm,α=72.03(2),β=107.72(3),γ=75.28(2)o,V=0.5884 nm 3,D c=2.105 g/cm 3,Z=1,F(000)=357,GOOF=1.041,the final R=0.01859 and wR=0.04348.The whole molecule is composed of two cooper ions,two Hpt molecules,two carbonate and three water molecules,forming a binuclear structure.The crystal structure shows that the cooper ion is coordinated with three nitrogen atoms from two Hpt molecules,two oxygen atoms from one carbonic acid and one water molecule,forming a distorted square pyramidal geometry.The TG analysis result shows that the title complex is stable under 131.0 ℃. 展开更多
关键词 copper(Ⅱ) complex hydrothermal synthesis crystal structure thermal stability analysis
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Hydrothermal Synthesis and Crystal Structure of a New Nickel(Ⅱ) Complex with 3,4-Pyridinedicarboxylic Acid and 1,4-Bis(imidazol-1-ylmethyl)-benzene Ligands 被引量:6
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作者 王庆伟 国佳 +3 位作者 芦廷峰 李秀梅 刘博 王志涛 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2012年第11期1575-1579,共5页
A metal-organic coordination polymer [Ni(PDB)(bix)(H20)]n (H2PDB = 3,4-pyri- dinedicarboxylic acid, bix = 1,4-bis(imidazol-l-ylmethyl)-benzene) 1 has been hydrothermally synthesized and characterized by elem... A metal-organic coordination polymer [Ni(PDB)(bix)(H20)]n (H2PDB = 3,4-pyri- dinedicarboxylic acid, bix = 1,4-bis(imidazol-l-ylmethyl)-benzene) 1 has been hydrothermally synthesized and characterized by elemental analysis, IR, TG and single-crystal X-ray diffraction. Blue crystals crystallize in the triclinic system, space group PI with a = 9.1849(8), b = 9.2065(9), c = 12.9308(12) °, a = 103.3070(10), β = 104.7160(10), y = 90.5900(10)°, V = 1026.42(16)/k3, C21H19NsNiOs, Mr = 480.12, Dc = 1.553 g/cm3, F(000) = 496, Z = 2,/l(MoKa) = 0.991 mm-1, the final R = 0.0325 and wR = 0.0799 for 3561 observed reflections (I 〉 2σ(I)). The structure of 1 exhibits a two-dimensional network structure. 展开更多
关键词 hydrothermal synthesis crystal structure coordination polymer
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Hydrothermal Synthesis and Crystal Structure of a New Three-dimensional Heterometallic Coordination Polymer 被引量:5
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作者 薛丽平 李召好 苗少斌 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2012年第6期791-796,共6页
A new 3d-4fheterometallic polymer {[Sm2Cu(PDC)2(SO4)2(H20)6]·2H2O}n 1 has been synthesized by Sm2O3, Cu(SO4)2·5H2O and pyridine-3,5-dicarboxylic acid under hydrothermal conditions. The compound cryst... A new 3d-4fheterometallic polymer {[Sm2Cu(PDC)2(SO4)2(H20)6]·2H2O}n 1 has been synthesized by Sm2O3, Cu(SO4)2·5H2O and pyridine-3,5-dicarboxylic acid under hydrothermal conditions. The compound crystallizes in triclinic system, space group Pi, with a = 6.352(7), b = 10.040(10), c = 10.315(11) A, α = 94.958(14), β = 95.556(7), γ = 99.747(14)°, V = 641.7(12)A3, Z = 1, M, = 1030.63, Dc= 2.651 Mg/m3,μ = 5.615 mm-1, F(000) = 491, the final R = 0.0491 and wR = 0.1345 for 2098 observed reflections with I 〉 2σ(I). The compound is a three-dimensional network structure in which infinite lanthanide-carboxylate chains are linked by [Cu($04)2]2- metalloligands to form a mixed-metal coordination network. 展开更多
关键词 hydrothermal synthesis crystal structure 3d-4fhybrid polymer thermal property
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Hydrothermal Synthesis and Crystal Structure of a Cobalt(II) Coordination Polymer: [Co(C_2O_4)(bix)]_n (bix = 1,4-Bis(imidazol-1-ylmethyl)-benzene) 被引量:6
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作者 王志涛 纪建业 +3 位作者 李秀梅 牛艳玲 王庆伟 刘博 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 2013年第2期296-300,共5页
A new two-dimensional cobalt coordination polymer has been prepared and fully characterized by elemental analysis, IR, TG and single-crystal X-ray diffraction. The compound [Co(C2O4)(bix)]n 1 crystallizes in the m... A new two-dimensional cobalt coordination polymer has been prepared and fully characterized by elemental analysis, IR, TG and single-crystal X-ray diffraction. The compound [Co(C2O4)(bix)]n 1 crystallizes in the monoclinic system, space group C2/c, with a = 11.549(3), b = 15.700(3), c = 9.260(2) A, β = 102.984(3)°, V = 1636.0(6) A^3, C16HIaCON4O4, Mr= 383.23, Dc = 1.556 g/cm^3, μ(MoKa) = 1.078 mm^-1, F(000) = 780, Z = 4, the final R = 0.0455 and wR = 0.1286 for 1483 observed reflections (I 〉 2σ(I)). Of the compound, the Co center is octahedrally coordinated with oxalate acting as a tetra-dentate ligand coordinated to the cobalt atom and each bix serving as a bridging ligand by employing two N-donors to coordinate with the Co center. An infinite {Co2(C2O4)2}∞ chain is formed along the α axis. Furthermore, the 1D chains are held together via bix ligands to generate a two-dimensional network structure with 1D coronal-like channels (ca. 5.691A × 15.700A). 展开更多
关键词 hydrothermal synthesis crystal structure coordination polymer
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Hydrothermal synthesis of spindle-like Li_2FeSiO_4-C composite as cathode materials for lithium-ion batteries 被引量:4
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作者 Haiyan Gao Zhe Hu +3 位作者 Kai Zhang Fangyi Cheng Zhanliang Tao Jun Chen 《Journal of Energy Chemistry》 SCIE EI CAS CSCD 2014年第3期274-281,共8页
In this paper,we report on the preparation of Li2FeSiO4,sintered Li2FeSiO4,and Li2FeSiO4-C composite with spindle-like morphologies and their application as cathode materials of lithium-ion batteries.Spindle-like Li2F... In this paper,we report on the preparation of Li2FeSiO4,sintered Li2FeSiO4,and Li2FeSiO4-C composite with spindle-like morphologies and their application as cathode materials of lithium-ion batteries.Spindle-like Li2FeSi04 was synthesized by a facile hydrothermal method with(NH4)2Fe(SO4)2 as the iron source.The spindle-like Li2FeSiO4 was sintered at 600 ℃ for 6 h in Ar atmosphere.Li2FeSiO4-C composite was obtained by the hydrothermal treatment of spindle-like Li2FeSiO4 in glucose solution at 190 ℃ for 3 h.Electrochemical measurements show that after carbon coating,the electrode performances such as discharge capacity and high-rate capability are greatly enhanced.In particular.Li2FeSiO4-C with carbon content of 7.21 wt%delivers the discharge capacities of 160.9 mAh·g-1 at room temperature and 213 mAh·g-1 at45℃(0.1 C),revealing the potential application in lithium-ion batteries. 展开更多
关键词 Li2FeSiO4-C composite spindle like hydrothermal synthesis cathode material lithium-ion battery
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Hydrothermal Synthesis and Electrochemical Properties of Complex Cu(CH_3C_6H_4COOH)_2(2,2′-bipy)·(H_2O) 被引量:5
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作者 LI Wei LI Chang-Hong +2 位作者 YANG Ying-Qun KUANG Dai-Zhi XU Wei-Jian 《Chinese Journal of Structural Chemistry》 SCIE CAS CSCD 北大核心 2006年第5期616-620,共5页
The title complex has been synthesized by 4-methylbenzoic acid and 2,2′-bipyridine (bipy) in the mixed solvent of water and methanol. It crystallizes in the triclinic system, space group P1^- with a = 0.7047(3), ... The title complex has been synthesized by 4-methylbenzoic acid and 2,2′-bipyridine (bipy) in the mixed solvent of water and methanol. It crystallizes in the triclinic system, space group P1^- with a = 0.7047(3), b = 1.1217(5), c = 1.6718(7) nm, α = 103.826(7), β = 90.772(6), γ = 104.195(6)°, C26H25CuN2O5.50, Mr = 517.02, V = 1.2404(9) nm^3, Dc = 1.384 g/cm^3, Z = 2, F(000) = 536,μ(MoKα) = 0.921 mm^-1, R = 0.0782 and wR = 0.2172. Structural analysis shows that the copper atom is coordinated with three oxygen atoms from two 4-methylbenzoic acids and one water molecule together with two nitrogen atoms from 2,2'-bipyridine, giving a distorted square-pyramid coordination geometry. The cyclic voltametric behavior of the complex has also been described. 展开更多
关键词 copper(Ⅱ) complex hydrothermal synthesis electrochemical property
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