摘要
在水-醇体系中,以钛酸四正丁酯及氧化石墨烯为初始原料,通过水热过程合成了一系列不同质量分数的石墨烯/TiO2复合光催化剂,该系列光催化剂对亚甲基蓝的吸附符合Freundlich等温吸附方程。当石墨烯的复合量为15%时,复合光催化剂显示了较佳的光催化活性。电化学分析结果表明,石墨烯的复合抑制了TiO2光生电子-空穴对的复合几率,有效提高了TiO2的光催化活性。在对亚甲基蓝的循环光催化降解实验中,GE/TiO2复合光催化剂显示了良好的循环使用性能。
A series of graphene（GE）/TiO2 composite photocatalysts with different graphene mass fraction were prepared in a water-ethanol system through hydrothermal process,using tetrabutyl titanate and graphene oxide as starting raw materials.The adsorption of methylene blue on the photocatalysts met Freundlich adsorption isotherms.When the mass fraction of graphene was 15%,the photocatalyst showed higher photocatalytic activity.The electrochemical analysis of the samples indicated that the combination of graphene suppressed the recombination of photoinduced electron-hole pairs,and thus significantly increased the photocatalytic activity of TiO2.Furthermore,the GE/TiO2 composites showed excellent cycling performance for the degradation of methylene blue.
出处
《化工新型材料》
CAS
CSCD
北大核心
2015年第10期43-45,共3页
New Chemical Materials
基金
国家自然科学基金项目(51273027)
关键词
TIO2
石墨烯
吸附
光催化活性
TiO2
graphene
adsorption
photocatalytic activity
