物理化学学报 >> 2012, Vol. 28 >> Issue (01): 154-160.doi: 10.3866/PKU.WHXB201228154

催化和表面科学 上一篇    下一篇

Ag@AgCl修饰TiO2-xCx光催化剂的制备及其可见光降解污染物性能

聂龙辉, 胡瑶, 张旺喜   

  1. 湖北工业大学化学与环境工程学院, 武汉 430068
  • 收稿日期:2011-08-15 修回日期:2011-11-08 发布日期:2011-12-29
  • 通讯作者: 聂龙辉 E-mail:nielonghui@mail.hbut.edu.cn
  • 基金资助:

    湖北工业大学博士启动基金(BSQD0826)资助项目

Preparation of a Ag@AgCl-Modified TiO2-xCx Photocatalyst and Its Performance for Degradation of Pollutants under Visible Light

NIE Long-Hui, HU Yao, ZHANG Wang-Xi   

  1. School of Chemical and Environmental Engineering, Hubei University of Technology, Wuhan 430068, P. R. China
  • Received:2011-08-15 Revised:2011-11-08 Published:2011-12-29
  • Contact: NIE Long-Hui E-mail:nielonghui@mail.hbut.edu.cn
  • Supported by:

    The project was supported by the Doctoral Foundation of Hubei University of Technology, China (BSQD0826).

摘要: 以钛酸丁酯和葡萄糖为原料用水热法制备了碳掺杂二氧化钛, 再进一步对其进行Ag@AgCl表面修饰.用X射线衍射(XRD), X射线光电子能谱(XPS), 透射电镜(TEM), BET比表面仪和紫外-可见(UV-Vis)漫反射光谱等手段对样品进行测试表征; 在可见光辐射下(λ>420 nm), 以甲基橙和苯酚溶液的光催化降解实验来评价样品的活性. 结果表明: 经Ag@AgCl修饰后, 样品的粒径增大, 比表面积减小, 对可见光的响应增强; 可见光光催化效率有大幅度提高, 对甲基橙和苯酚的降解效率分别是修饰前的5.5 和3.4 倍, 且光催化剂经三次循环使用后活性基本保持不变.

关键词: 可见光活性, 银-氯化银, 碳掺杂二氧化钛, 等离子体共振, 甲基橙, 苯酚

Abstract: C-doped TiO2 was prepared from butyl titanate and glucose by a hydrothermal method. The prepared C-doped TiO2 was further modified with Ag@AgCl. The obtained samples were characterized by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), BET surface area analysis, and UV-Vis diffuse reflectance spectroscopy. The photocatalytic activity of the samples was evaluated by the degradation of methyl orange and phenol under the visible light irradiation (λ >420 nm). After modification with Ag@AgCl, the C-doped TiO2 samples had a larger particle size and smaller surface area with enhanced response to visible light and greatly improved visible-light photocatalytic activity. The degradation rates of methyl orange and phenol over Ag@AgCl/TiO2-xCx were 5.5 and 3.4 times as large as those over TiO2-xCx, respectively. The photocatalytic activity of Ag@AgCl/TiO2-xCx under visible light remained almost unchanged after three cycles.

Key words: Visible-light activity, Ag-AgCl, C-doped TiO2, Plasmon resonance, Methyl orange, Phenol

MSC2000: 

  • O643