热还原法制备氧化石墨烯/TiO_2复合材料及其光催化性能研究  

Synthesis of graphene oxide/titanium dioxide composite material by thermal reduction method and its photocatalytic activity

作　　者：陈春明[1,2] 陈中华[2] 曾幸荣[2] 

机构地区：[1]韩山师范学院化学系 [2]华南理工大学材料科学与工程学院

出　　处：《功能材料》2015年第16期16152-16156,共5页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(50973033)

摘　　要：采用Hummers法制得氧化石墨烯,以钛酸丁酯为钛源,采用原位溶胶-凝胶技术制备了氧化石墨烯/TiO2复合材料,进一步经过加热还原的方法,制备热还原氧化石墨烯/TiO2复合光催化剂,通过FT-IR、XRD、Raman、SEM、TEM和UV-Vis光谱等对产物进行了表征,并测试了该复合光催化剂在可见光下对甲基橙的光催化降解性能。结果表明,制备的复合光催化剂主晶相为锐钛矿型TiO2,热还原氧化石墨烯表面富集的颗粒尺寸15nm左右,颗粒分布均匀。热还原氧化石墨烯/TiO2复合光催化剂在可见光下具有优异的光催化性能。Graphene oxide（GO）was prepared using a modified Hummers method with flake graphite as raw materials,then the graphene oxide/titanium dioxide（GO/TiO2）was synthesized through a in situ sol-sel method using tetrabutyl titanium as Ti source,and themally reduced graphene oxide/TiO2 composite photocatalyst was prepared by annealing under inert atmosphere.The photocatalyst was characterized by FT-IR,XRD,Raman,SEM,TEM and UV-Vis spectrophotometry.The photocatalytic degradation of methyl orange using the photocatalyst was studied.The results showed that the main phase of products is antase TiO2,the TiO2 nanoparticles with the diameter about 15 nm attached on the surface of reduced graphene oxide matrix and formed a layer of dense TiO2.The composite photocatalyst exhibited a excellent photocatalytic property under visible light region.

关 键 词：氧化石墨烯 TIO2 热还原法 复合材料 光催化 

分 类 号：O649.5[理学—物理化学] TQ110.7[理学—化学]