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Photoinduced Electron Transfer Between Mono-6-p-nitrobenzoyl-ˉ-cyclodextrin and Adamantanamine-Cn-Co/Ni-porphyrins
Hui Huang*, Wen-kui Zhang, Yong-ping Gan, Lei Zhang, Chen Wang
College of Chemical Engineering and Materials Science, Zhejiang University of Technology, Hangzhou 310032, China
Abstract:
Perovskite-type SrTiO3 nanoparticles were synthesized by direct hydrolysis-precipitation method and were employed to modify the surface of the carbon nanotubes to form a SrTiO3/CNTs composite. The photoelectrochemical lithium insertion characteristics of the SrTiO3/CNTs composite under xenon light irradiation were investigated. The results show that the light irradiation has little influence on the specific capacity of the CNTs electrode. However, for the SrTiO3/CNTs electrode irradiated by light, the lithium insertion capacity reaches about 251 mAh/g, much higher than that without light irradiation (170 mAh/g). Cyclic voltammetry test reveals that the light irradiation can remarkably increase the reaction currents of lithium insertion and extraction. This may be attributed to the photo-excited intercalation of Li-ions into the CNTs by the SrTiO3 photocatalyst when irradiated by light.
Key words:  Carbon nanotubes, Strontium titanate, Photo-electrochemical characteristics, Li-ion batteries
FundProject:
表面修饰SrTiO3光催化剂纳米碳管的光电化学嵌锂特性
黄辉*    , 张文魁  , 甘永平  , 张蕾  , 王琛
浙江工业大学化工与材料学院,杭州,310032
摘要:
采用直接水解沉淀的方法制备了钙钛矿型SrTiO3纳米粒子,并将其修饰在纳米碳管表面形成SrTiO3/CNTs纳米复合材料,研究了SrTiO3/CNTs电极在氙灯照射下的光电化学嵌锂特性.实验结果表明,光照射对CNTs电极的嵌锂容量影响不大,而SrTiO3/CNTs电极受光照时的嵌锂容量高达251 mAh/g,远高于无光照下的嵌锂容量(170 mAh/g).循环伏安测试也表明光照射可显著提高嵌脱锂反应电流.这可归因于SrTiOa光催化剂受光照射而诱发的纳米碳管嵌锂反应.
关键词:  纳米碳管  钛酸锶  光电化学特性  锂离子电池
DOI:10.1360/cjcp2006.19(5).428.5
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