CdS柱撑钛铌酸介孔复合材料的制备与光解水制氢活性  

Preparation of Mesoporous CdS-Pillared Titanoniobate Nanohybrids and Their Photocatalytic Water-Splitting Activity for Hydrogen Generation

作　　者：蒋少锋[1] 姚倩茹 高碧芬[1] 陈亦琳[1] 林碧洲[1] 

机构地区：[1]华侨大学材料科学与工程学院,厦门361021

出　　处：《无机化学学报》2015年第3期514-520,共7页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.50872037);福建省自然科学基金(No.2014J01187)资助项目

摘　　要：以钛铌酸纳米片层为主体,CdS纳米颗粒为客体,通过剥离-重堆积法合成了不同投料比的CdS-TiNbO5介孔复合材料,材料的层间距为1.19nm,比表面积约为93m2·g-1。CdS-TiNbO5复合材料表现出良好的光解水制氢活性,当投料比nCdS∶nHTiNbO5=1∶2时,复合材料在模拟太阳光和可见光下的产氢速率分别为231和184μmol·h-1·g-1,是CdS的8.6和9.7倍。复合材料光催化活性的提高归因于比表面积的增加和光生载流子的有效分离。Mesoporous CdS-pillared titanoniobate nanohybrids were successfully prepared via an exfoliationrestacking route. It was found that as-prepared CdS-TiNbO5 nanohybrids have an interlayer spacing of 1.19 nm and high specific surface areas of about 93 m2·g-1. The nanohybrids showed a remarkable photocatalytic hydrogen-evolution activity in water splitting. When the molar ratio of Cd S and titanoniobate nanosheets was equal to 1∶2, the H2-evolution rate reached 231 and 184 μmol·h-1·g-1under irradiation of 300 W Xe lamp and visible light, which is 8.6 and 9.7 times as high as the blank Cd S. The improvement of photocatalytic activity is predominantly ascribed to the enlarged specific surface area and the effective spatial separation of photogenerated carriers between the host and guest.

关 键 词：柱撑材料 钛铌酸纳米片层 硫化镉 光催化制氢 

分 类 号：O614.242[理学—无机化学] O643.3[理学—化学]