钛(Ⅳ)离子掺杂的氧化锌多壁纳米纤维结构材料的制备及光催化性能  

Preparation and Photocatalytic Property of Titanium( Ⅳ)Dopped Zinc Oxide Nanofiber Materials with Multi-wall Structure

作　　者：苏碧桃[1] 邵克让 李建娇[1] 莘俊莲 雷自强[1] 

机构地区：[1]西北师范大学化学化工学院,生态环境相关高分子材料教育部重点实验室,甘肃省高分子材料重点实验室,兰州730070

出　　处：《应用化学》2015年第10期1170-1176,共7页Chinese Journal of Applied Chemistry

基　　金：甘肃省科技计划项目(1204GKCA006);国家自然科学基金项目(21174114);教育部“长江学者和创新团队发展计划”创新团队项目(IRT1177);甘肃省自然科学基金项目(1010RJZA024);西北师范大学科技创新项目(nwnu-kjcxgc-03-63)~~

摘　　要：借助棉花纤维模板、利用两步法制备了Ti4+/Zn O多壁纳米纤维结构材料,利用热重分析(TG)、X射线衍射(XRD)和扫描电子显微镜(SEM)等技术手段对其进行了表征;以亚甲基蓝(MB)的降解脱色为模型反应,考察了Ti4+掺杂量对Zn O多壁纳米纤维结构材料光催化性能的影响。结果表明,利用模板辅助的两步法成功制备了Ti4+掺杂的Zn O多壁纳米纤维结构材料(Ti4+/Zn O);Ti4+的掺入影响Zn O材料的纳米结构,从而使Ti4+/Zn O的光催化性能明显高于Zn O;Ti4+/Zn O多壁纳米纤维结构材料良好的光催化性能可主要归于Ti4+/Zn O材料中活性中心-O2--Ti4+-O2--Zn2+-的形成和光生电荷e--h+沿着颗粒间的有效传递。Ti4＋/ZnO nanofiber materials with muhi-wall structures were prepared by the template-assisted two-step method and characterized by thermogravimetric analysis （ TG）, X-ray diffraction （XRD） and scanning electron microscopy （SEM） techniques. The effect of Ti4＋ doping amount （ 0. 000 - 0. 200 at. % ） on the photocatalytic property of ZnO nanofiber materials was studied by the model degradation reaction of methylene blue（MB）. The results show that Ti4＋/ZnO nanofiber materials with multi-wall structures are successfully prepared via the templated-assisted two-step method, doping Ti4＋ can greatly change the nano-structure of the Ti4＋/ZnO fiber materials, and the photocatalytic activity of Ti4＋/ZnO nanofiber materials are higher than that of ZnO. The improved photocatalytic activity of Ti4＋/ZnO multi-wall nanofibers can be mainly ascribed to the formation of the active site --02- -Ti4＋ -O2- -Zn2＋- and the efficient migration of the photogenerated charges e--h＋ from particle to particle in Ti4＋/ZnO.

关 键 词：钛(Ⅳ)掺杂 氧化锌 多壁纳米纤维结构材料 模板辅助的两步法 表征 光催化性能 

分 类 号：O643.3[理学—物理化学]