共搜索到9809条信息，每页显示10条信息，共981页。用时：0小时0分0秒440毫秒
文章编号:1004-0609(2008)S1-0326-05 α-Co(OH)2的合成及其电化学电容行为 杨幼平,赵世兴,黄可龙,曾雯雯,刘素琴,张平民 (中南大学 化学与化工学院,长沙 410083) 摘 要:以CoCl2为钴源,六次甲基四胺(HMT)为沉淀剂,十二烷基硫酸钠(SDS)为表面活性剂,当溶剂配比(即无水乙醇与去离子水的体积比)为1?9时,采用均匀沉淀法合成水滑石结构的α-Co(OH)2.用X射线衍射和扫描电镜对合成产物的物相和形貌进行表征,通过恒电流充放电和循环伏安法研究α-Co(OH)2电极的电化学电容行为.结果表明:在1 mol/L KOH溶液中,-0.2~0.45 V (vs SCE)电位范围内,5 mA电流充放电时,合成的α-Co(OH)2单电极的初始比容量为184.28 F/g,经过800次循环后样品的比容量仍保持在90%以上. 关键词:α-Co(OH......
AlOOH和Al(OH)3在NaOH溶液和铝酸钠溶液中的溶解?结晶性能可知,铝酸根的存在抑制了游离碱对晶体的侵蚀作用.关键词:铝酸钠溶液；晶种分解；附聚；游离碱；分子比Effect of free caustic alkali on agglomeration in seeded precipitation of sodium aluminate solutionXU Rong-guang1, 2...铝酸钠溶液晶种分解过程中游离碱对晶体附聚的影响徐荣广1, 2,王 志1,公旭中1,张 娟1, 2(1. 中国科学院 过程工程研究所 湿法冶金清洁生产技术国家工程实验室,北京 100190；2. 中国科学院 研究生院,北京 100049)摘 要:利用铝酸钠溶液晶种分解过程研究游离碱对晶体附聚的影响,利用NaOH溶液模拟游离碱环境研究AlOOH和Al(OH)3在NaOH溶液中......
Trans. Nonferrous Met. Soc. China 23(2013) 1033-1038 Preparation and electrochemical performance of nano-scale Ni(OH)2 doped with zinc Li ZHAO, Zhi-hao LIU, Lei JIN School of Chemical Engineering and Technology, Harbin Institute of Technology, Harbin 150001, China Received 20 February 2012; accepted 11 June 2012 Abstract: Nano-scale Ni(OH)2 doped with Zn was prepared by precipitation......
ANISOTROPY OF (1× 1)-SURFACE FREE ENERGIES OF CRYSTALS A.Flodstrom1,Z.M.Yu2 (1.Royal Institute of Technology, KTH, Office of the President, Valhallavagen 79, S-100 44 Stockholm, Sweden;2.Department of Materials Science and Engineering, Central South University, Changsha 410083, China) Abstract:The surface free energy (SFE) of (1× 1)-surfaces of crystals, without reconstructionand adsorption......
文章编号:1004-0609(2008)11-2100-05 表面包覆CaSn(OH)6的锌酸钙的制备及其性质 杨占红,王升威,曾利辉,王小花,刘东任 (中南大学 化学化工学院,长沙 410083) 摘 要:采用化学沉积法在四边形锌酸钙表面包覆一层金属锡化合物.利用X射线衍射,扫描电子显微镜,电化学阻抗谱,Tafel曲线以及充放电循环(用做锌镍电池的负极材料)等方法,对包覆前后的锌酸钙样品进行表征.结果表明:包覆物化学组成为CaSn(OH)6,该包覆物在锌酸钙的表面分布均匀,沉积较为致密；包覆后的锌酸钙材料具有更好的耐腐蚀性能,且其电化学循环性能良好,经过135次循环后,电池放电容量仍保持设计容量的65.5%. 关键词:锌酸钙；表面包覆；CaSn(OH)6；Tafel曲线；电化学性能 中图分类号:TM 912.2 ......
indicates that the reaction process is not limited to the generation of hydroxyl free radical (·OH) in the system.Key words:Fe-C-TiO2; atrazine; hydrogen peroxide; hydroxyl free radical; visible light...应；反应体系的荧光光谱分析显示,阿特拉津的降解涉及较单纯羟基自由基(·OH)更为复杂的反应机理.关键词:Fe-C-TiO2；阿特拉津；过氧化氢；羟基自由基；可见光催化Preparation and characterization of Fe-C-TiO2TANG Jian-jun1, 2, ZOU Yuan1, LI Shao-feng2(1. School of Construction......
Free vibration of vibrating device coupling two pendulums using multiple time scales methodLI Jun(李珺), LIU Chu-sheng(刘初升), PENG Li-ping(彭利平), WANG Hong(王宏)(School of Mechanical and Electrical... the existence of typical nonlinear phenomenon. In addition, the chaotic motion is found under this condition.Key words:free vibration; coupling pendulums; multiple time scales method; nonlinear characteristic......
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+) JIAO Xiaoyan1,DING Jiawen1,WU Yanli1,ZHOU Xuezhen1,LI Yongxiu1,SUN Weili1... (TEM), particle size and specific surface area determination.The results showed that the cubic Y_2O_3 did not transfer into hexagonal Y(OH)_3 in pure water. Therefore, pure hexagonal Y(OH)_3......
A free search algorithm with double populations for QoS multicast routing KONG Sun(孔笋), CHEN Zeng-qiang(陈增强) (Department of Automation, Nankai University, Tianjin 300071, China) Abstract: In this paper, we introduce a modified free search (FS) algorithm to solve QoS multicast routing problem. Based on basic FS, the algorithm introduces an auxiliary population to retain the suboptimal solutions......
: A Agglomeration mechanism of surfactant of ultra-fine Al(OH)3 in drying process LIU Gui-hua1, ZHANG Yu-min2, LI Xiao-bin1 (1. School of Metallurgical Science and Engineering, Central South... μm), which maybe due to the easy absorption of surfactant for the ultra-fine particle. The results from IR show that the characteristic peak appears at 1 310 cm-1 accounting for free O-H when......
