Ag掺杂的K2La2Ti3O10可见光催化制氢的研究

功能材料, 2010, 41(4): 716-721.

Ag掺杂的K2La2Ti3O10可见光催化制氢的研究

刘利 ^1, , 崔文权 ^2, , 梁英华 ^3, , 邱发礼 ^4,

1.河北理工大学,化工与生物技术学院,河北,唐山,063009

2.河北理工大学,化工与生物技术学院,河北,唐山,063009

3.河北理工大学,化工与生物技术学院,河北,唐山,063009

4.中科院成都有机化学研究所,四川,成都,610041

基金项目: 国家自然科学基金资助项目(50972037) 唐山市重点实验室基金资助项目(08360204A-3)

关键词：光催化 , 制氢 , K2La2Ti3O10 , 可见光 , Ag掺杂

Photocatalytic activity of Ag-doped K2La2Ti3O10 under visible light irradiation for hydrogen evolution

采用高温固相法合成了具有可见光响应的Ag掺杂的K2La2Ti3O10催化剂,利用XRD、UV-Vis DRS、TEM和XPS对催化剂进行了表征.考察了催化剂的可见光催化分解甲醇水溶液制氢的活性,并对可见光催化机理进行了分析.研究表明,Ag的掺杂没有改变K2La2Ti3O10的微晶结构,并使催化剂粒径有所减小.紫外-可见漫反射分析表明禁带宽度为2.8eV左右,对可见光具有较高吸收.担载2%(质量分数)Pt后,在可见光下光催化活性较K2La2Ti3O10大大提高,掺杂1%(摩尔分数)Ag的K2La2Ti3O10的产氢量为0.37mmol,而纯K2La2Ti3O10的产氢量只有0.037mmol;掺杂1%(摩尔分数)Ag的K2La2Ti3O10的产氢速率最大0.08mmol/h.

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