K₂La₂Ti₃O₁₀的制备和光催化产氢性能

来源期刊：中国有色金属学报2007年第4期

论文作者：杨亚辉 陈启元 尹周澜 李洁

文章页码：642 - 642

关键词：溶胶-凝胶法；光催化活性；氢气

Key words：sol-gel method; photocatalytic activity; hydrogen

摘    要：通过聚合?配合方法和溶胶-凝胶方法，制备了具有层状钙钛矿结构复合氧化物K₂La₂Ti₃O₁₀光催化剂，采用X射线衍射(XRD)、紫外-可见漫反射光谱(DRS)、扫描电镜(SEM)等手段进行表征；以I^-为电子给体，比较了制备方法对K₂La₂Ti₃O₁₀分解水产氢活性的影响。研究结果表明，溶胶-凝胶法制备的K₂La₂Ti₃O₁₀比聚合?配合法制备的K₂La₂Ti₃O₁₀光催化产氢活性要高出1倍左右，且制备条件友好，所得K₂La₂Ti₃O₁₀具有较好的单相性；获得了以I^-为电子给体，溶胶?凝胶法制备的K₂La₂Ti₃O₁₀分解水的最佳实验条件：产氢的最佳pH值为11.5，RuO₂的负载量为0.2%~0.3%。

Abstract: An ion-exchangeable layered perovskite type oxide, K₂La₂Ti₃O₁₀, was prepared by polymerized complex method and sol-gel method and characterized by XRD, DRS and SEM, et al. The influence of preparation method on the photocatalytic reactivity of K₂La₂Ti₃O₁₀ for hydrogen production was studied while I- was used as electron donor. The optimum condition for water splitting was investigated when K₂La₂Ti₃O₁₀ prepared by sol-gel method was used as photocatalyst. The results show that, the sol-gel method has superiority compared with the polymerized complex method. When K₂La₂Ti₃O₁₀ prepared by sol-gel method is used as photocatalyst for water splitting, the hydrogen production rate is twice of that prepared by polymerized complex. The preparation condition is kind and it is easy to get single phase K₂La₂Ti₃O₁₀ photocatalyst with sol-gel method. When K₂La₂Ti₃O₁₀ is used as photocatalyst with I- as electron donor, the optimum water splitting condition is obtained as follows: pH value is 11.5, the amount of loading RuO2 on K₂La₂Ti₃O₁₀ photocatalyst is 0.2%-0.3%.

基金信息：国家“863”计划资助项目