高等学校化学学报 ›› 2015, Vol. 36 ›› Issue (6): 1174-1179.doi: 10.7503/cjcu20140952

• 物理化学 • 上一篇    下一篇

四丁基氢氧化铵改性TiO2的可见光催化活性

匡元江1, 古瑶2, 郭丽梅2, 王海涛2, 王恩君3, 曹亚安2()   

  1. 1. 中国人民解放军镇江船艇学院物理教研室, 镇江 212008
    2. 南开大学泰达应用物理研究院, 南开大学物理科学学院, 弱光非线性光子学教育部重点实验室, 天津 300457
    3. 中国科学院合肥物质科学研究所, 合肥 230031
  • 收稿日期:2014-10-27 出版日期:2015-06-10 发布日期:2015-05-22
  • 作者简介:联系人简介: 曹亚安, 男, 博士, 教授, 主要从事低维功能纳米材料研究. E-mail:caoya@nankai.edu.cn
  • 基金资助:
    国家自然科学基金(批准号: 21173121, 51372120)资助

Photocatalytic Activity of Tetrabutyl Ammonium Hydroxide Modified TiO2 Under Visible Light Irradiation

KUANG Yuanjiang1, GU Yao2, GUO Limei2, WANG Haitao2, WANG Enjun3, CAO Yaan2,*()   

  1. 1. Department of Physics, Zhenjiang Watercraft College, People’s Liberation Army, Zhenjiang 212008, China
    2. Key Laboratory of Weak-Light Nonlinear Photonics, Ministry of Education, TEDA Applied Physical Institute and School of Physics, Nankai University, Tianjin 300457, China
    3. Hefei Institutes of Physical Science, Chinese Academy of Sciences, Hefei 230031, China
  • Received:2014-10-27 Online:2015-06-10 Published:2015-05-22
  • Contact: CAO Yaan E-mail:caoya@nankai.edu.cn
  • Supported by:
    † Supported by the National Natural Science Foundation of China(Nos.21173121, 51372120)

摘要:

采用溶胶-凝胶法和四丁基氢氧化铵(TBAH)表面改性的方法制备出改性TiO2光催化剂(TBAH-TiO2). 利用X射线衍射谱(XRD)、 X射线光电子能谱(XPS)、 透射电子显微镜(TEM)、 傅里叶变换红外光谱(FTIR)和表面光电压谱(SPS)等表征了催化剂的晶体结构、 晶粒粒径和能带结构, 并研究了其光催化活性. 研究结果表明, TBAH-TiO2催化剂的表面主要存在NOx(x=1, 2, 3)物种, 该物种能级(价带上0.20 eV)产生了可见光响应, 有效地促进了光生电子和光生空穴的分离, 使催化剂的可见和紫外光催化活性显著提高, TBAH-TiO2催化剂降解对氯苯酚的可见光和紫外光催化活性分别是TiO2的2.6倍和1.7倍.

关键词: 二氧化钛, 四丁基氢氧化铵, 光催化活性

Abstract:

Tetrabutyl ammonium hydroxide modified TiO2 photocatalyst(TBAH-TiO2) was prepared by a sol-gel method and surface modification method with tetrabutyl ammonium hydroxide(TBAH). The structure, crystallite size and energy levels of the photocatalysts were studied by X-ray diffraction(XRD), X-ray photoelectron spectroscopy(XPS), transmission electron microscopy(TEM), Fourier transform infrared(FTIR) spectroscopy and surface photovoltaic spectroscopy(SPS). The experimental results of 4-chlorophenol photocatalytic degradation showed that TBAH-TiO2 exhibited a better photocatalytic activity than TiO2. Its photocatalytic efficiency is 2.6 and 1.7 times as high as that of pure TiO2 under visible light and ultraviolet light, respectively. The results reveal that NOx(x=1, 2 and 3) species that exist on the surface of the TBAH-TiO2 catalyst introduce the energy level of surface states 0.20 eV above the valence band. This energy level not only makes the catalyst responsible to visible light but also promotes the separation of photogenerated carriers. Thus, the activities under ultraiolet light and visible light irradiations are increased.

Key words: TiO2, Tetrabutyl ammonium hydroxide(TBAH), Photocatalytic activity

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