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层状光催化材料H2La2Ti3O10/CdS的制备及其性质研究
引用本文:张莉莉,刘冠鹏,张维光,陆路德,杨绪杰,汪信. 层状光催化材料H2La2Ti3O10/CdS的制备及其性质研究[J]. 中国稀土学报, 2006, 24(2): 168-173
作者姓名:张莉莉  刘冠鹏  张维光  陆路德  杨绪杰  汪信
作者单位:1. 南京理工大学化工学院材料化学实验室,江苏,南京,210094;淮阴师范学院化学系,江苏,淮安,223001
2. 南京理工大学化工学院材料化学实验室,江苏,南京,210094
基金项目:江苏省研究生培养创新工程项目;江苏省高校自然科学基金;江苏省淮安市科技计划
摘    要:通过改善酸交换过程,用分步柱撑法制备了一种新的层柱材料H2La2Ti3O10/CdS.用X射线粉末衍射(XRD)、红外光谱(IR)、比表面(BET)等方法对材料进行了表征;以光催化降解苯胺为探针对材料的活性进行了研究.结果表明: 通过柱撑CdS,H2La2Ti3O10的光催化性能得到明显提高;同时,对试验条件进行了优化,得到了最佳催化反应条件.

关 键 词:镧钛酸盐  柱撑  苯胺  光降解  稀土
文章编号:1000-4343(2006)02-0168-06
收稿时间:2005-06-06
修稿时间:2005-06-062005-10-18

Synthesis and Property of H2La2Ti3O10/CdS Layered Nanocomposite Photocatalyst
Zhang Lili,Liu Guanpeng,Zhang Weiguang,Lu Lude,Yang Xujie,Wang Xin. Synthesis and Property of H2La2Ti3O10/CdS Layered Nanocomposite Photocatalyst[J]. Journal of the Chinese Society of Rare Earths, 2006, 24(2): 168-173
Authors:Zhang Lili  Liu Guanpeng  Zhang Weiguang  Lu Lude  Yang Xujie  Wang Xin
Abstract:H_2La_2Ti_3O_ 10/CdS nanocomposite with high photoactivity was synthesized by a stepwise exchange process from H_2La_2Ti_3O_ 10, which was obtained by H+-exchanging reaction of K_2La_2Ti_3O_ 10 with HCl other than the normally used HNO_3. The pillaring process was investigated by XRD, TEM, FT-IR, and BET methods. The photocatalytic decomposition of aniline was used as the model system to evaluate the photochemical properties of H_2La_2Ti_3O_ 10/CdS, H_2La_2Ti_3O_ 10 and K_2La_2Ti_3O_ 10. It is found that the photoactivity of layered H_2La_2Ti_3O_ 10 is greatly improved by the intercalation of CdS in the interlayer. In general, the excellent photoactivity of the H_2La_2Ti_3O_ 10/CdS nanocomposite might be attributing to the extremely small particle size of incorporated CdS and good contact between CdS and La_2Ti_3O_ 10 2- layers. On the other hand, the coupling of two semiconductor particles with different energy gap is useful to achieve effective charge separation. In H_2La_2Ti_3O_ 10/CdS, a photo-generated electron can transfer from CdS to the La_2Ti_3O_ 10 2- layer, while the holes remain in the CdS particles. This helps to diffuse the electrons and holes before reaching the interface, and the holes and electrons can be effectively captured by the electrolyte in the solution. Simultaneously, the optimal operating condition of photodecomposition aniline was investigated.
Keywords:layered lanthanum titanate    pillaring   aniline    photodecomposition   rare earths
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