GO物理形态对复合光催化剂性能的影响  被引量:1

Influences of the physical state of the GO on the capacity of composite photocatalyst

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作  者:杨茹[1,2] 杨晶晶[1,2] 陈慧[1,2] 白仁碧[1,2] 周清 赵吉 高宜[4] 

机构地区:[1]苏州科技学院分离净化材料与技术研发中心,江苏苏州215009 [2]江苏高校水处理技术与材料协同创新中心,江苏苏州215009 [3]华衍水务(中国)有限公司,江苏苏州215200 [4]中国市政工程华北设计研究总院有限公司,天津300074

出  处:《工业水处理》2016年第10期67-71,共5页Industrial Water Treatment

基  金:江苏省环境科学与工程重点实验室开放课题(ZD131206);苏州市分离净化材料与技术重点实验室项目(SZS201512);苏州市水利水务科研课题(2015-7-1);苏州科技学院科研基金项目(XKQ201503)

摘  要:以钛酸四丁酯以及固态和液态的氧化石墨烯(GO)为前驱物,分别制备了标记为TiO_2-RGO(s)和TiO_2-RGO(l)的复合光催化剂。对制备的2种复合光催化剂进行了表征,并以亚甲基蓝(MB)为目标物,对比研究了2种催化剂的光催化效能。结果表明,TiO_2-RGO(l)和TiO_2-RGO(s)的能级带宽分别降低至2.8、2.9 e V;二者光降解MB的效能均优于TiO_2自身,且降解效率随着GO含量的增加而增加;当TiO_2与GO的质量比为1∶0.06时,TiO_2-RGO(l)和TiO_2-RGO(s)对MB的降解率分别为96%和84%。动力学研究表明:TiO_2-RGO(l)和TiO_2-RGO(s)的准一级反应速率常数分别是TiO_2的3.2倍和2.2倍。Composite photocatalysts (TiOE-RGO (s) and TiO2-RGO (1)) have been prepared,respectively,using tetrabutyl titanate and solid state and liquid state graphene oxide (GO) as predecessors. Two kinds of prepared composite photocatalysts are characterized. Taking methylene blue (MB) as the target, the photoeatalytic effect of the two kinds of composite photocatalysts are compared and studied. The results show that the energy level broad bands of TiOE-RGO (1) and TiO2-RGO (s) are decreased to 2.8 eV and 2.9 eV ,respectively. The efficiency of both photo- degradation of MB are better than TiO2 itself. Furthermore,the degradation efficiency increases with the increase of GO content. When the mass ratio of TiO2 and GO is 1:0.06, the degradation rates of MB by TiO2-RGO (1) and TiO2- RGO (s) are 96% and 84% ,respectively. The kinetics research shows that the pseudo first-order reaction rate cons- tants of TiO2-RGO (1) and TiO2-RGO (s) are 3.2 and 2.2 times as much as TiO2, respectively.

关 键 词:二氧化钛 氧化石墨烯 光催化 亚甲基蓝 

分 类 号:X703[环境科学与工程—环境工程]

 

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