Effect of the morphology of V2O5/TiO2 nanoheterostructures on the visible light photocatalytic activity

被引：28
|
作者：
Su, Qing [1 ,2 ]
Zhang, Jiawang [1 ,2 ]
Wang, Yuan [3 ]
Yu, Minglang [1 ,2 ]
Zhu, Chengquan [1 ,2 ]
Lan, Wei [1 ,2 ]
Liu, Xueqin [1 ,2 ]
机构：
[1] Lanzhou Univ, Sch Phys Sci & Technol, Lanzhou 730000, Peoples R China
[2] Lanzhou Univ, Minist Educ, Key Lab Magnetism & Magnet Mat, Lanzhou 730000, Peoples R China
[3] CAEP, Inst Fluid Phys, Natl Key Lab Shock Wave & Detonat Phys, Mianyang 621900, Sichuan, Peoples R China
来源：
JOURNAL OF PHYSICS AND CHEMISTRY OF SOLIDS | 2013年 / 74卷 / 10期
基金：
中国国家自然科学基金;
关键词：
Nanostructures; Oxides; Chemical syntehsis; Electron microscopy; Microstructure; TIO2; NANOSTRUCTURES; PERFORMANCE; CO;
D O I：
10.1016/j.jpcs.2013.05.009
中图分类号：
O6 [化学];
学科分类号：
0703 ;
摘要：
The V2O5/TiO2 nanoheterostructures with various morphologies were prepared by typical one-step electrospinning process. The effect of annealing temperatures and V/Ti molar ratio on the visible light photocatalytic activity of V2O5/TiO2 nanoheterostructures was investigated by photodegradation of the Rhodamine B (RhB). The experimental results indicated that the annealing temperature and V/Ti molar ratios were important factors for the morphology of samples which influenced the number of efficient V2O5/TiO2 nanoheterostructure. The V2O5/TiO2 nanoheterostructures annealed at 400 degrees C with the V/Ti molar ratio of 1:1 exhibited the highest photocatalytic efficiency. Beyond 400 degrees C, the growth of V2O5 grains enhanced and big V2O5 rods formed on the V2O5/TiO2 nanofibers, so the efficient V2O5/TiO2 nanoheterostructures decreased, leading to the lower photocatalytic efficiency. The lower or higher V/Ti molar ratio could decrease the number of efficient V2O5/TiO2 nanoheterostructures, which reduced the photocatalytic activity. (c) 2013 Elsevier Ltd. All rights reserved.
引用
收藏
页码：1475 / 1481
页数：7
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