微波法制备CdS插层K_2Ti_4O_9复合物及其光催化制氢活性的研究

Preparation with the Aid of Microwave Radiation and Photocatalytic Properties of CdS Intercalated Layerd K_2Ti_4O_9

采用微波法离子交换制备了CdS插层K2Ti4O9催化剂,利用XRD,BET,紫外-可见漫反射光谱和XPS对催化剂进行了表征.考察了催化剂在紫外光和模拟太阳光下的光催化活性,并对其机理进行了分析.研究表明,采用微波法制备的催化剂与传统法制备的催化剂结构相似,进而有效地减少离子交换反应时间.微波法CdS插层K2Ti4O9催化剂在紫外光及模拟太阳光照射3 h的累积产氢量分别为161.6和2.1 mmol/gcat,是传统法制备的催化剂活性的1.7和2.7倍.

CdS intercalated layerd K2Ti4O9 was prepared by iron exchange with the aid of microwave ra-diation,and was characterized by XRD,BET,UV-vis spectra,and XPS.The photocatalytic activity was car-ried out under UV light and simulant sunlight.The results showed that the structure of catalyst either pre-pared under microwave radiation or used conventional way was similar,but the reaction time of the former was reduced effectively.The photocatalytic hydrogen production activity in 3 h of CdS intercalated layerd K2Ti4O9 prepared with the aid of microwave radiation under UV light and sunlight irradiation,was 161.6 and 2.1 mmol/gcat,respectively.The photocatalytic activity was 1.7 and 2.7 times of the catalyst prepared by conventional way.