TiO2-GO/LDHs复合光催化剂的制备和表征  

Preparation and characterization of TiO2-GO/LDHs composite photocatalyst

作　　者：张启彦 王路瑶 郑凯 高雪 苏继新[1] Zhang Qiyan;Wang Luyao;Zheng Kai;Gao Xue;Su Jixin(School of Environmental Science and Engineering,Shandong University,Qingdao 266000,Shandong,China)

机构地区：[1]山东大学环境科学与工程学院

出　　处：《工业催化》2019年第8期60-64,共5页Industrial Catalysis

基　　金：科技部重点项目(2016YFE0112200)

摘　　要：将钛酸四丁酯与氧化石墨烯/镁铝层状双金属氢氧化物(GO/LDHs)通过水热合成原位生长法制备二氧化钛-氧化石墨烯/镁铝层状双金属氢氧化物(TiO2-GO/LDHs)复合光催化剂,对TiO2、TiO2-GO和TiO2-GO/LDHs的物相结构和表面形态进行表征。模拟太阳光条件下催化剂对有机染料罗丹明B和抗生素四环素的光催化降解效果。结果显示,GO的加入使TiO2颗粒分散的更加均匀,不易团聚。TiO2-GO对罗丹明B的降解效果优于单一TiO2,表明GO的加入扩展了TiO2的光响应范围,抑制了电子-空穴对的复合。TiO2-GO/LDHs的降解效果优于TiO2-GO,表明LDH捕获光生空穴,加速氧化反应,生成更多的强氧化性羟基,可以更好地降解污染物。The TiO 2-GO/LDHs composite photocatalyst was prepared by hydrothermal synthesis from butyl titanate and graphene oxide/MgAl-layered double hydroxides(GO/LDHs).The phase structure and surface morphology of TiO 2,TiO 2-GO and TiO 2-GO/LDHs were characterized.The photocatalytic degradation activity of catalyst for organic dyes Rhodamine B and antibiotic tetracycline under solar light condition was simulated.The results show that the addition of GO could significantly disperse TiO 2.The degradation activity of TiO 2-GO for Rhodamine B is better than that of single TiO 2,which indicates that the addition of GO enlarges the light response range of TiO 2 and inhibits the recombination of electron-hole pairs.The degradation activity of TiO 2-GO/LDHs is better than that of TiO 2-GO,which indicates that LDHs can capture photogenic holes,accelerate oxidation reaction and produce more strongly oxidized hydroxyl groups,which can better degrade pollutants.

关 键 词：催化化学 石墨烯 层状双金属氢氧化物 原位合成 二氧化钛 光降解 

分 类 号：O643.36[理学—物理化学] TQ034[理学—化学]