物理化学学报 >> 2013, Vol. 29 >> Issue (09): 1837-1841.doi: 10.3866/PKU.WHXB201307024

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三元杂化TiO2-SiO2-POMs催化剂的合成及其在可见光降解罗丹明B中的应用

王晓夏1, 徐华龙1, 沈伟1, RUHLMANN Laurent2, 秦枫1, SORGUES Sébastien3, COLBEAU-JUSTIN Christophe3   

  1. 1 复旦大学化学系, 上海市分子催化与功能材料重点实验室, 复旦大学先进材料实验室, 上海 200433;
    2 Laboratoired' Electrochimie et de Chimie Physique du Corps Solide, Institut de Chimie, UMR au CNRS n°7177, Université de Strasbourg, France;
    3 Laboratoire de Chimie Physique, UMR au CNRS n°8000, Université Paris-Sud 11, Orsay, France
  • 收稿日期:2013-05-15 修回日期:2013-07-02 发布日期:2013-08-28
  • 通讯作者: 徐华龙 E-mail:shuhl@fudan.edu.cn
  • 基金资助:

    上海市科委科技基金(12DZ2275100);法国国家科学研究院和斯特拉斯堡大学资助项目

Synthesis of Ternary Hybrid TiO2-SiO2-POM Catalysts and Its Application in Degrading Rhodamine B under Visible Light Illumination

WANG Xiao-Xia1, XU Hua-Long1, SHEN Wei1, RUHLMANN Laurent2, QIN Feng1, SORGUES Sébastien3, COLBEAU-JUSTIN Christophe3   

  1. 1 Department of Chemistry, Shanghai Key Laboratory of Molecular Catalysis and Innovative Materials, Laboratory of Advanced Materials, Fudan University, Shanghai 200433, P. R. China;
    2 Laboratoire d'Electrochimie et de Chimie Physique du Corps Solide, Institut de Chimie, UMR au CNRS n°7177, Université de Strasbourg, France;
    3 Laboratoire de Chimie Physique, UMR au CNRS n°8000, Université Paris-Sud 11, Orsay, France
  • Received:2013-05-15 Revised:2013-07-02 Published:2013-08-28
  • Contact: XU Hua-Long E-mail:shuhl@fudan.edu.cn
  • Supported by:

    The project was supported by the Shanghai Committee of Science and Technology, China (12DZ2275100) and Centre National de la Recherche Scientifique, France and Université de Strasbourg, France.

摘要:

采用分步溶胶-凝胶法制备的三元杂化催化剂TiO2-SiO2-杂多酸(POMs)在可见光降解工业染料罗丹明B中表现出了高效反应活性. 利用时间分辨微波传导(TRMC)和漫反射光谱(DRS)研究了催化剂在可见光区的光催化性能, 实验结果表明: 在三元杂化催化剂内, 二氧化钛和二氧化硅的键合加强了催化剂在可见光区的响应和吸收, 二氧化钛和杂多酸的结合提高了反应活性位(空穴-电子对)的稳定性. 三元杂化催化剂TiO2-SiO2-POMs中组分之间的协同效应促进了可见光光催化性能的提高.

关键词: TiO2-SiO2-POMs, 罗丹明B, 协同效应, 可见光降解

Abstract:

Ternary hybrid TiO2-SiO2-polyoxometalates (POMs) synthesized by stepped sol-gel method exhibit remarkable efficiency in photodegrading the industrial dye Rhodamine B. Time resolved microwave conductivity (TRMC) and diffuse reflection spectrophotometry (DRS) were used to investigate excess charge-carrier lifetimes and the band gap of the ternary hybrid TiO2-SiO2-POM catalysts. The binding of TiO2 and SiO2 reinforces absorbance across the visible spectra and the combination of TiO2 and POMs improves the stability of h+-e- pairs, which are the active sites of the reaction. In the ternary hybrid system, the synergistic effect amongst the three components contributes to better photocatalytic ability under visible light illumination when compared with either monomer TiO2 or POMs.

Key words: TiO2-SiO2-POM, Rhodamine B, Synergistic effect, Photodegradation under visible light illumination

MSC2000: 

  • O643