TiO_2/石墨烯纳米复合材料制备及其光催化性能研究  

Preparation and Photocatalytic Performance of TiO_2/Graphene Nano-composite Material

作　　者：周建伟[1,2] 王储备[1] 禇亮亮 张明瑛[3] 史磊[3] 

机构地区：[1]新乡学院能源与燃料研究所,新乡453003 [2]清华大学化学系,北京100084 [3]新乡学院化学与化工学院,新乡453003

出　　处：《人工晶体学报》2013年第4期762-767,共6页Journal of Synthetic Crystals

基　　金：河南省高校科技创新人才支持计划项目资助(2010HASTIT040)

摘　　要：以TiCl3和氧化石墨(GO)为原料,采用简便的原位液相法制备了TiO2/石墨烯(RGO)纳米复合材料。利用XRD、SEM、XPS和UV-Vis光谱表征了其微观结构及性能,实验考察了复合材料光催化还原CO2性能,探究了其光催化反应机理。研究表明,TiO2/石墨烯纳米复合材料具有显著的光催化还原活性,光催化反应产物选择性高,反应6.0 h甲醇的累积产量为3.43 mmol/L,石墨烯的协同效应提高了TiO2半导体的光催化活性和反应效率。TiO2/graphene composite photocatalyst has been prepared by a facile liquid phase deposition method using titanium trifluoride and graphene oxide as the raw materials. The products were characterized by X-ray diffraction, scanning electron microscopy, X-ray photoelectron spectroscopy and UV-Visible analysis. It was found that the reduction graphene was covered with petal-like anatase TiO2 nanoparticles, which were more uniform and smaller in size. The photocatalytic activities were evaluated using the photocatalytic reduction of CO2. Photocatalytic reduction of CO2 with H2O in the aqueous phase is studied by using TiO2/graphene catalyst under UV irradiation. The results showed that the compostie exhibited significantly photocatalytic reduction activities and reaction products high selectivity, reaction 6 h methanol accumulated production for 3.43 mmol/L. Graphene effectively improved the photocatalytic activity and reaction efficiency of the semiconductor, and synergistic effect was obvious.

关 键 词：TIO2 石墨烯复合材料 光催化 协同效应 反应机理 

分 类 号：O643.36[理学—物理化学]