催化学报 ›› 2014, Vol. 35 ›› Issue (9): 1578-1589.DOI: 10.1016/S1872-2067(14)60124-8

• 论文 • 上一篇    

铋掺杂二氧化钛纳米颗粒的制备及其可见光催化性能

李海燕a,b, 刘金凤a, 钱俊杰a, 李秋叶a, 杨建军a   

  1. a 河南大学特种功能材料重点实验室, 河南开封475004;
    b 河南大学化学化工学院, 河南开封475004
  • 收稿日期:2014-02-24 修回日期:2014-04-21 出版日期:2014-08-19 发布日期:2014-08-22
  • 通讯作者: 杨建军
  • 基金资助:

    国家自然科学基金(20973054,21103042,21203054).

Preparation of Bi-doped TiO2 nanoparticles and their visible light photocatalytic performance

Haiyan Lia,b, Jinfeng Liua, Junjie Qiana, Qiuye Lia, Jianjun Yanga   

  1. a Key Laboratory for Special Functional Materials, Henan University, Kaifeng 475004, Henan, China;
    b College of Chemistry and Chemical Engineering, Henan University, Kaifeng 475004, Henan, China
  • Received:2014-02-24 Revised:2014-04-21 Online:2014-08-19 Published:2014-08-22
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (20973054, 21103042, 21203054).

摘要:

采用水热法,以纳米管钛酸为前驱物制备了Bi掺杂的TiO2,并利用X射线衍射、透射电子显微镜、X射线光电子能谱、紫外-可见漫反射光谱等手段对样品进行了表征. 以甲基橙的光催化降解为模型反应评价了样品的可见光催化性能. 结果表明,Bi离子并没有进入TiO2的晶格中,而是以BiOCl的形式存在. 所制得的BiOCl/TiO2复合物对甲基橙降解表现出较优越的可见光催化活性;当Bi/Ti摩尔比为1%,水热温度为130℃时,所制催化剂的光催化性能最佳,并对光催化活性提高的机理进行了讨论. 同时,该催化剂对4-氯苯酚降解也表现出较高的光催化性能.

关键词: 水热法, 铋掺杂, 二氧化钛, 纳米管钛酸, 氧空位, 可见光催化

Abstract:

Bi-doped TiO2 photocatalysts were prepared by a hydrothermal method using nanotube titanic acid as the Ti precursor. The samples were characterized by X-ray diffraction, transmission electron microscopy, ultraviolet-visible diffuse reflectance spectroscopy, and X-ray photoelectron spectroscopy. Methyl orange (MO) was used as a model contaminant to evaluate the visible light photocatalytic activity of the Bi-doped TiO2 samples. We found that the Bi ions did not incorporate into the TiO2 lattice but instead existed in the form of BiOCl. The obtained BiOCl-composited TiO2 samples exhibited remarkable photocatalytic activity under visible light irradiation for the photodegradation of MO. The sample obtained when the Bi/Ti molar ratio was 1% and the hydrothermal treatment temperature was 130 ℃ (BTO-130-1) showed the highest photocatalytic activity. Moreover, a possible mechanism was proposed and the enhanced photocatalytic activity was discussed. The as-prepared catalyst also showed high photocatalytic activity for the photodegradation of 4- chlorophenol.

Key words: Hydrothermal method, Bismuth-doping, Titanium dioxide, Nanotube titanic acid, Oxygen vacancy, Visible light photocatalysis