氧化钛/氧化石墨烯复合结构及其光催化性能

被引：26

作者：

张琼

贺蕴秋

陈小刚

胡栋虎

李林江

季伶俐

尹婷

机构：

[1] 同济大学材料科学与工程学院

来源：

科学通报 | 2010年 / 55卷 / 07期

关键词：

二氧化钛; 氧化石墨烯; 插层复合材料; 光催化性能;

D O I：

暂无

中图分类号：

TB332 [非金属复合材料];

学科分类号：

0805 ; 080502 ;

摘要：

采用氧化石墨和硫酸钛作为初始反应物,在低温下(<100℃)制备得到了纳米级的氧化钛-氧化石墨烯插层复合材料,即TiO2-Graphene Oxide intercalated composite,可记为TiO2-Graphene Oxide.这种材料是以经碱溶液剥离后单层和多层的氧化石墨混合物(即氧化石墨烯)作为负载,由Ti(SO4)2水解生成的[TiO]2+基团通过静电吸引扩散进入到氧化石墨烯层间,在低温条件下成核生长,形成了TiO2-Graphene Oxide插层复合材料.同时,还研究了这一复合材料的紫外光催化性能,结果表明,在采用TiO2-Graphene Oxide插层复合材料对甲基橙溶液进行紫外光催化降解时,其降解效率达到η=1.16mg.min-1.g-1(此为复合材料15min内对甲基橙的降解效率),明显优于同等条件下P25粉的降解率η=0.51mg.min-1.g-1.还对TiO2-Graphene Oxide插层复合材料的可重复使用性能和稳定性能进行了研究.最后,通过对TiO2-Graphene Oxide插层复合材料进行XRD,XPS,TGA,ESEM和HRTEM测试,表征了产物的晶相、界面状况、热性能及其显微结构,并分析了这一复合结构对改善光催化性能的主要影响因素和作用机理.

引用

页码：624 / 632

页数：9

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