TiO_2/石墨烯复合材料的合成及光催化分解水产氢活性  

Preparation and Photocatalytic Activity for Hydrogen Evolution of TiO_2/Graphene Sheets Composite

作　　者：张晓艳[1] 李浩鹏[1] 崔晓莉[1] 

机构地区：[1]复旦大学材料科学系,上海200433

出　　处：《无机化学学报》2009年第11期1903-1907,共5页Chinese Journal of Inorganic Chemistry

基　　金：国家高技术研究发展计划(863)(No.2006AA05Z121);国家自然科学基金(No.20673028);上海市重点学科建设(No.B113)资助项目

摘　　要：利用石墨粉根据Hummers氧化法制得氧化石墨,并进一步还原得到石墨烯。采用溶胶-凝胶法以钛酸四丁酯和石墨烯为起始材料制备了二氧化钛(TiO2)和石墨烯的复合光催化材料。研究了该复合材料在紫外-可见光以及可见光条件下的光催化分解水制氢活性。结果表明,紫外-可见光照射下,TiO2/石墨烯复合光催化材料的光催化分解水产氢速率为8.6μmol.h-1,远大于同条件下商业P25的产氢速率(4.5μmol.h-1),光解水产氢活性提高了近2倍;可见光下光照3 h,TiO2/石墨烯复合材料的光催化分解水产氢量约为0.2μmol。Graphene sheets （GSs） were prepared by reduction of graphite oxide （GO）, which was obtained from oxidation of graphite powder by Hummers＇ method. The composite of titanium dioxide/graphene sheets （TiO2/GSs） was synthesized using tetrabutyl titanate and GSs as the starting materials by a sol-gel method. The photocatalytic activity for hydrogen evolution of TiO2/GSs was evaluated from water photo-splitting under ultraviolet-visible （UV-Vis） and visible light illumination, respectively. The results showed that the as-prepared TiO2/GSs composite exhibited a hydrogen evolution rate of 8.6μmol·h^-1 under UV-Vis light irradiation, nearly two times larger than that of P25 （4.5 μmol·h^-1）. Total hydrogen amount about 0.2 μmol was observed within 3 h under visible light illumination for the as-prepared TiO2/GSs composite.

关 键 词：石墨烯 二氧化钛 光解水 产氢 

分 类 号：O643.32[理学—物理化学]