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%。
An ion-exchangeable layered perovskite type oxide, K2La2Ti3010, 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 K2La2Ti3010 for hydrogen production was studied while I- was used as electron donor. The optimum condition for water splitting was investigated when K2La2Ti3Olo 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 K2La2Ti3010 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 K2La2Ti3010 photocatalyst with sol-gel method. When K2La2Ti3010 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 K2La2Ti3Oi0 photocatalyst is 0.2%-0.3%.
出处
《中国有色金属学报》
EI
CAS
CSCD
北大核心
2007年第4期642-648,共7页
The Chinese Journal of Nonferrous Metals
基金
国家"863"计划资助项目(2002AA327140)
关键词
溶胶-凝胶法
光催化活性
氢气
sol-gel method
photocatalytic activity
hydrogen
