以ACF为模板制备掺氮TiO2及其光催化脱氨氮研究

doi:10.7517/j.issn.1674-0475.2005.05.374

影像科学与光化学 ›› 2005, Vol. 23 ›› Issue (5): 374-381.DOI: 10.7517/j.issn.1674-0475.2005.05.374

以ACF为模板制备掺氮TiO₂及其光催化脱氨氮研究

李威¹, 柳丽芬^1,2, 杨凤林¹, 张兴文¹, 余济美³

1. 大连理工大学, 环境与生命学院, 辽宁, 大连, 116023;
2. 大连理工大学纳米材料科学研究中心, 辽宁, 大连, 116023;
3. 香港中文大学, 化学系, 香港

收稿日期:2005-04-05 修回日期:2005-05-27 出版日期:2005-09-23 发布日期:2005-09-23
通讯作者: 柳丽芬(1965-), 女, 研究领域为纳米材料及环境污染控制, 电话:0411-84706173.
基金资助:
国家自然科学基金(20477006).

Preparation of N Doped TiO₂ by Using ACF as Template and Its Photocatalytic Application in Removing Nitrogen from Water

LI Wei¹, LIU Li-fen^1,2, YANG Feng-lin¹, ZHANG Xing-wen¹, YU Jimmy Chai-mei³

1. School of Environmental and Biological Science & Technology, Dalian University of Technology, Dalian 116023, Liaoning, P.R. China;
2. Center for Nanomaterial and Science, Dalian University of Technology, Dalian 116023, Liaoning, P.R. China;
3. Department of Chemistry, The Chinese University of Hong Kong, Hong Kong

Received:2005-04-05 Revised:2005-05-27 Online:2005-09-23 Published:2005-09-23

摘要/Abstract

摘要： 本文采用溶胶-凝胶法制备了以活性炭纤维(ACF)为模板的掺氮TiO₂光催化剂,利用XRD、XPS、TEM、SEM和UV-Vis等方法对催化剂进行了表征,测定了催化剂在紫外、日光照射下光催化脱氨氮的活性.ACF作模板掺氮TiO₂催化剂具有介孔结构,平均粒径约为10 nm,比表面积为64.43 m²/g.紫外、可见光光催化2 h氨氮(85 mg/L)废水的氨氮去除率分别为68%和47%.结果表明,催化剂中氮的含量是影响催化剂光催化活性的重要因素.

关键词: 二氧化钛, 光催化氧化, 可见光活性, 脱氨氮, 掺氮

Abstract: TiO_2-xN_x nanoparticles were prepared by a sol-gel method with using ACF as template, and were characterized using various techniques such as XRD,SEM and TEM, XPS and UV-Vis. The particles were mainly in anatase form, about 10 nm in size, with certain nanotube structures (d 5 nm). The ratio of Ti to N in N doped TiO₂ can reach 1:0.19.The absorbency wavelength in UV-Vis spectra may extend to 700—800 nm. The photocatalytic activities of TiO_2-xN_x were evaluated by the photocatalytic oxidation of ammonia in water using ultraviolet or solar light as light source. The best ammonia removal(2 h) under solar light and UV photocatalysis reached 47% and 68% respectively. It is concluded that nitrogen doping contributes to visible light activity and oxidative removal of ammonia from water.

Key words: titanium dioxide, photocatalytic oxidation, visible light activity, ammonia removal, N doping

中图分类号:

李威, 柳丽芬, 杨凤林, 张兴文, 余济美. 以ACF为模板制备掺氮TiO₂及其光催化脱氨氮研究[J]. 影像科学与光化学, 2005, 23(5): 374-381.

LI Wei, LIU Li-fen, YANG Feng-lin, ZHANG Xing-wen, YU Jimmy Chai-mei. Preparation of N Doped TiO₂ by Using ACF as Template and Its Photocatalytic Application in Removing Nitrogen from Water[J]. Imaging Science and Photochemistry, 2005, 23(5): 374-381.

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以ACF为模板制备掺氮TiO₂及其光催化脱氨氮研究

Preparation of N Doped TiO₂ by Using ACF as Template and Its Photocatalytic Application in Removing Nitrogen from Water

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