高等学校化学学报 ›› 2013, Vol. 34 ›› Issue (9): 2202-2209.doi: 10.7503/cjcu20121175

• 物理化学 • 上一篇    下一篇

三维有序大孔复合材料Ag/TiO2的制备与不同模式下的光催化性能

路露1, 李莉1,2, 黄贤丹1, 李召1, 张秀丽1, 王丽丽1   

  1. 1. 齐齐哈尔大学材料科学与工程学院, 齐齐哈尔 161006;
    2. 黑龙江省高校复合改性材料重点实验室, 齐齐哈尔 161006
  • 收稿日期:2012-12-31 出版日期:2013-09-10 发布日期:2013-08-30
  • 作者简介:李莉,女,博士,教授,主要从事纳米复合材料的制备与光催化性能研究.E-mail:qqhrll@163.com
  • 基金资助:

    黑龙江省自然科学基金(批准号:B201106);黑龙江省教育厅科学技术研究项目(批准号:12511592);黑龙江省政府博士后资助经费(批准号:LBH-Z11108);黑龙江省研究生创新科研项目(2013年);黑龙江省普通高校绿色化工技术重点实验室开放课题(2013年);国家自然科学基金(批准号:21376126)资助.

Preparation and Photocatalytic Activities with Different Modes of Three-dimensionally Ordered Macroporous Composite Ag/TiO2

LU Lu1, LI Li1,2, HUANG Xian-Dan1, LI Zhao1, ZHANG Xiu-Li1, WANG Li-Li1   

  1. 1. College of Materials Science and Engineering, Qiqihar University, Qiqihar 161006, China;
    2. Key Laboratory Composition of Polymer and Modification College of Heilongjiang Province, Qiqihar 161006, China
  • Received:2012-12-31 Online:2013-09-10 Published:2013-08-30

摘要:

采用聚苯乙烯(PS)微球和EO20PO70EO20(P123)作为模板剂, 通过溶胶-凝胶及煅烧后处理等方法制备了三维有序大孔复合材料Ag/TiO2(3DOM Ag/TiO2). 经傅里叶变换红外光谱、X射线衍射、紫外-可见漫反射吸收光谱、X射线光电子能谱、N2吸附-脱附测试和扫描电子显微镜配合X 射线能量色散谱等测试手段对其组成、结构及形貌等进行了表征. 结果显示, 该复合材料的孔结构排列整齐有序, 孔壁呈现介孔结构且分布均匀, 属于三维有序大孔材料. 该3DOM Ag/TiO2具有锐钛矿晶相, 其Ag以单质形式存在. 与商用光催化剂(Degussa P-25)相比, 3DOM Ag/TiO2对光的吸收红移至可见区. 考察了3DOM Ag/TiO2在紫外光、可见光以及微波辅助等不同模式下光催化降解有机污染物的性能. 结果显示, 其活性明显高于P-25和Ag/TiO2, 且针对不同类型的有机污染物均表现出较好的光催化性能.

关键词: 三维有序大孔材料, Ag/TiO2, 光催化, 有机污染物

Abstract:

Using polystyrene(PS) latex sphere and triblock copolymer surfactant EO20PO70EO20(P123) as templates, three-dimensionally ordered macroporous(3DOM) composite Ag/TiO2 was prepared by the sol-gel method and calcination. The phase compositions, structures and morphologies of 3DOM Ag/TiO2 were well-characterized by Fourier transform infrared(FTIR) spectra, X-ray diffraction(XRD), UV-Vis diffuse reflectance spectra(UV-Vis/DRS), X-ray photoelectron spectra(XPS), N2 adsorption-desorption tests and scanning electron microscopy assisted X-ray energy dispersive spectroscopy(SEM-EDS). The results show that the pore structure of Ag/TiO2 composite is distributed neat and orderly, whose wall is mesoporous, moreover, the composite belongs to three-dimensional ordered macroporous material. The 3DOM Ag/TiO2 has anatase crystalline structure, in which Ag is metallic Ag0. Compared with Degussa P25, the absorption band of 3DOM Ag/TiO2 is red-shifted ca. 30 nm to the visible region. For photocatalytic degradation of organic pollutants with different modes, including UV, visible light and mircomave-assisted irradiation, 3DOM Ag/TiO2 shows better activities than Degussa P25 and Ag/TiO2. In addition, 3DOM Ag/TiO2 exhibits superior photocatalytic activity in the degradation process of different type organic pollutans.

Key words: Three-dimensionally ordered macroporous(3DOM), Ag/TiO2, Photocatalysis, Organic pollutant

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