华南理工大学学报(自然科学版) ›› 2007, Vol. 35 ›› Issue (6): 91-96.

• 化学化工 • 上一篇    下一篇

掺钒t TiO2 粉末的制备及光催化活性

柳松谢添华1 张正国2  颜燕琼1   

  1. 1.华南理工大学 化学科学学院,广东 广州 510640; 2. 华南理工大学 化工与能源学院,广东 广州 510640
  • 收稿日期:2006-11-21 出版日期:2007-06-25 发布日期:2007-06-25
  • 通信作者: 柳松(1967-),男,副教授,主要从事光催化及功能材料研究. E-mail:chsliu@scut. edu.cn
  • 作者简介:柳松(1967-),男,副教授,主要从事光催化及功能材料研究.
  • 基金资助:

    华南理工大学传热强化与过程节能教育部重点实验室基金资助项目

Preparation and Photocatalytic Activity of V -Doped TiO2 Powders

Liu SongXie Tian-huaZhang Zheng-guo yan Yan-qiong1   

  1. 1. School of Chemistry , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China;2. School of Chemical and Energy Engineering , South China Univ. of Tech. , Guangzhou 510640 , Guangdong , China
  • Received:2006-11-21 Online:2007-06-25 Published:2007-06-25
  • Contact: 柳松(1967-),男,副教授,主要从事光催化及功能材料研究. E-mail:chsliu@scut. edu.cn
  • About author:柳松(1967-),男,副教授,主要从事光催化及功能材料研究.
  • Supported by:

    华南理工大学传热强化与过程节能教育部重点实验室基金资助项目

摘要: 为提高TiO2 的光催化活性,采用溶胶-凝胶法制备了两种不同掺钒方式的TiO2粉末,并用XRD 、TEM 、XPS 和UV-Vis 等技术对样品进行了表征,通过对甲基橙的光催化降解动力学来验证催化剂的光催化活性.结果表明:在500℃下焙烧3h 后制得的催化剂为锐钛矿相,粒径在15 -30nm 之间;与单一的V/TiO2 不同,往纯TiO2 中掺杂V/TiO2 后,XPS 测试中检测不出V2p 的特征峰;光催化实验证实,当V/TiO2 与纯TiO2 处于一定比例时样品具有更高的催化效率.

关键词: 二氧化钛, 光催化, 制备, 钒, 掺杂

Abstract:

In order to improve the photocatalytic activity of TiO2 , vanadium-doped TiO2 catalysts were synthesized in two modes by means of sol-gel method , and the products were characterized by using XRD , TEM , XPS and UVVis spectroscopy , whose photocatalytic activity was then evaluated by the photocatalytic degradation of methyl orange. The results show that the prepared V -doped TiO2 anatase is 15 - 30 nm in diameter after calcination at 500℃ for 3 h and different from primary V -doped TiO2 .The characteristic peak of V 2p can not be detected by XPS on the surface of V -doped TiO2 coated with pure TiO2 • Moreover , it is verified by photocatalytic reaction that the catalysts possess higher photocatalytic efficiency when the mole ratio of V -doped TiO2 to pure TiO2 reaches a suitable value.

Key words: titania, photocatalysis, preparation, vanadium, doping