催化学报

催化学报 ›› 2006, Vol. 27 ›› Issue (10): 890-894.

• 研究论文 • 上一篇    下一篇

可见光响应的氯掺杂TiO2的制备、表征及其光催化活性

陈恒,龙明策,徐俊,蔡伟民   

  1. 上海交通大学环境科学与工程学院, 上海 200240
  • 收稿日期:2006-10-25 出版日期:2006-10-25 发布日期:2010-11-28

Preparation, Characterization, and Photocatalytic Activity of Visible Light Driven Chlorine-Doped TiO2

CHEN Heng, LONG Mingce, XU Jun, CAI Weimin*   

  1. School of Environmental Science and Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
  • Received:2006-10-25 Online:2006-10-25 Published:2010-11-28

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摘要： 采用HCl水解钛酸四丁酯制备了可见光响应的氯掺杂TiO2光催化剂,并用X射线衍射线、透射电子显微镜、 X射线光电子能谱(XPS)和紫外-可见漫反射吸收光谱等测试手段对其结构进行了表征. 结果表明,氯元素的引入降低了无定形相向锐钛矿转变以及锐钛矿向金红石相转变的温度. 300 ℃焙烧的氯掺杂TiO2吸收波长拓展到可见光区,且XPS证实氯元素以阴离子形式存在于TiO2晶格中. 苯酚降解实验表明, 在大于400 nm的可见光照射下, 300 ℃焙烧的氯掺杂TiO2具有最佳的光催化活性, 120 min时苯酚的降解率达到42.5%.

关键词: 二氧化钛, 氯掺杂, 可见光, 光催化, 苯酚

Abstract: A novel chlorine-doped titanium dioxide catalyst with visible light response was prepared by hydrolysis of tetrabutyl titanate in hydrochloric acid. The catalyst samples were characterized by X-ray diffraction, transmission electron microscopy, X-ray photoelectron spectroscopy (XPS), and ultraviolet-visible diffuse reflectance spectroscopy. The results showed that the doped element of Cl lowered the temperature of phase transformation of TiO2 from amorphous to anatase and from anatase to rutile. The absorption edge of chlorine-doped TiO2 calcined at 300 ℃ shifted to the visible light region. XPS results proved that chlorine existed in the TiO2 crystal lattice as an anion. The photocatalytic degradation of phenol showed that under visible light (λ>400 nm) irradiation, the chlorine-doped TiO2 photocatalyst calcined at 300 ℃ displayed the best performance, and the degradation ratio of phenol was 42.5% after 120 min.

Key words: titanium dioxide, chlorine doped, visible light, photocatalysis, phenol