物理化学学报 >> 2013, Vol. 29 >> Issue (12): 2655-2660.doi: 10.3866/PKU.WHXB201310141

材料物理化学 上一篇    下一篇

类微乳化学沉淀法合成BiOBr-TiO2纳米复合材料及其光催化性能

栾云博1,冯玉杰1, 王文欣2, 谢明政1, 井立强2   

  1. 1 哈尔滨工业大学, 城市水资源与水环境国家重点实验室, 城市水资源开放利用(北方)工程研究中心, 哈尔滨 150090;
    2 黑龙江大学, 功能无机材料化学教育部重点实验室, 哈尔滨 150080
  • 收稿日期:2013-07-17 修回日期:2013-10-14 发布日期:2013-11-28
  • 通讯作者: 冯玉杰, 井立强 E-mail:yujief@hit.edu.cn;Jinglq@hlju.edu.cn
  • 基金资助:

    国家自然科学基金(21071048)资助项目

Synthesis of BiOBr-TiO2 Nanocrystalline Composite by Microemulsion-Like Chemical Precipitation Method and Its Photocatalytic Activity

LUAN Yun-Bo1, FENG Yu-Jie1, WANG Wen-Xin2, XIE Ming-Zheng1, JING Li-Qiang2   

  1. 1 National Engineer Research Centar of Urban Water Resources, Harbin Institute of Technology, State Key Laboratory of Urban Water Resource and Environment, Harbin 150090, P. R. China;
    2 Key Laboratory of Functional Inorganic Materials Chemistry, Ministry of Education, Heilongjiang University, Harbin 150080, P. R. China
  • Received:2013-07-17 Revised:2013-10-14 Published:2013-11-28
  • Contact: FENG Yu-Jie, JING Li-Qiang E-mail:yujief@hit.edu.cn;Jinglq@hlju.edu.cn
  • Supported by:

    The project was supported by the National Natural Science Foundation of China (21071048).

摘要:

采用简单的类微乳化学沉淀法获得了有效复合的BiOBr-TiO2纳米材料. 该合成方法的关键在于Br-的双重作用. Br-既作为“桥”将十六烷基三甲基溴化铵(CTAB)中CTA+与TiO2粒子相连, 构筑了稳定的油包水的类微乳体系. 同时, 它又作为BiOBr 的溴源有助于纳米复合材料异质结的形成. 与纯TiO2和传统的水相化学沉淀法获得的BiOBr-TiO2复合样品相比, 采用类微乳化学沉淀法获得的复合光催化剂表现出高的光生电荷分离效率, 相应地显示出优异的光催化降解气相乙醛和液相苯酚的性能, 这主要与BiOBr和TiO2粒子之间异质结的有效构筑有关.

关键词: TiO2, BiOBr, 类微乳化学沉淀法, 纳米复合材料, 光催化

Abstract:

Nanocrystalline BiOBr-TiO2 composite has been prepared using a microemulsion-like chemical precipitation method. The key to this method is the dual role of Br- in the synthetic process. The Br- of cetyl trimethyl ammonium bromide is able to link the cetyltrimethyl ammonium cation with anatase TiO2 to form a water-in-oil microemulsion-like system. Meanwhile, Br- is also a bromine source favorable for the fabrication of a nanoheterostructure between BiOBr and TiO2. Compared with pure TiO2 and BiOBr-TiO2 composite obtained using a traditional aqueous system, the as-obtained BiOBr-TiO2 displays high photogenerated charge separation, responsible for excellent photocatalytic activity for degrading liquid-phase phenol solution and gas-phase acetaldehyde. This result is ascribed to its effective heterostructure.

Key words: TiO2, BiOBr, Microemulsion-like chemical precipitation method, Nanocomposite, Photocatalysis

MSC2000: 

  • O643