石墨烯/TiO_2复合光催化剂的制备及其光催化制氢活性  

Preparation and photocatalytic activity for hydrogen evolution of graphene/TiO_2 photocatalyst

作　　者：涂盛辉[1] 梁海营[1] 胡亚平[1] 彭海龙[1] 杜军[1] 万金保[1] 

机构地区：[1]南昌大学环境与化学工程学院,南昌330031

出　　处：《化工新型材料》2013年第12期79-81,91,共4页New Chemical Materials

基　　金：国家自然科学基金(21201098;51162022)

摘　　要：采用水热法制备出了石墨烯/TiO2复合光催化剂,通过X射线衍射(XRD),扫描电子显微镜(SEM),红外光谱(FT-IR),紫外-可见漫发射光谱(DRS)等方法对石墨烯/TiO2进行表征,并研究了该催化剂在可见光和太阳光下光催化分解C2H5OH/H2O溶液的产氢活性,实验结果表明,经过水热反应,氧化石墨(GO)被还原成石墨烯(rGO),TiO2粒子负载在片状石墨烯上,太阳光下,光照5h样品产氢量(3444.36μmol)为P25(1598.25μmol)的2.16倍。此外,本工作还对光催化分解C2H5OH/H2O溶液的产氢过程进行了分析讨论。In order to study the phoyocatalytic activity for hydrogen evolution of graphene/TiO~ composite photo- catalysts from photo-splitting of C2 H2OH/H2O solution under visible light and sunshine irradiation, the photocatalysts was prepared by hydrothermal method. The samples were characterized by X-ray diffraction（XRD）, scanning electron micro- scope（SEM） ,Fourier transform infrared spectroscopy（ FT-IR） and UV-vis diffuse reflectance spectroscopy. The results in- dicated that the graphene oxide was reduced to graphene and the TiO2 particles loaded on the sheet of graphene through hy- drothermal process, total hydrogen amount of the sample（3444. 362μmol） was about 2.16 times of P25（1598. 25μmol）with- in 5h under sunshine light irradiation. Furthermore,a detailed mechanism for photocatalytie hydrogen evolution from split- ting of C2 Hs OH/H2O solution was investigated.

关 键 词：水热法 光催化 石墨烯 制氢 

分 类 号：O643.36[理学—物理化学]