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

页码：1475 / 1481

页数：7

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