掺杂Yb的TiO2光催化剂的制备和性能

doi:10.7517/j.issn.1674-0475.2005.06.453

影像科学与光化学 ›› 2005, Vol. 23 ›› Issue (6): 453-459.DOI: 10.7517/j.issn.1674-0475.2005.06.453

掺杂Yb的TiO₂光催化剂的制备和性能

李慧泉¹, 陈伟凡², 马继龙¹, 崔玉民¹

1. 阜阳师范学院化学系, 安徽阜阳236041;
2. 南京理工大学国家特种超细粉体工程技术研究中心, 江苏南京210094

收稿日期:2005-07-18 修回日期:2005-09-07 出版日期:2005-11-23 发布日期:2005-11-23
通讯作者: 李慧泉,男,Tel:(0558)2595045,E-mail:huiquanLi@126.com.
基金资助:
安徽省自然科学基金项目(050450301);安徽省高等学校青年教师科研项目(2005jq1131)

Preparation and Properties of Yb Doped TiO₂ Photocatalysts

LI Hui-quan¹, CHEN Wei-fan², MA Ji-long¹, CUI Yu-min¹

1. Chemistry Department of Fuyang Normal College, Fuyang 236041, Anhui, P. R. China;
2. National Special Superfine Powder Engineering Research Center, Nanjing University of Science and Technology, Nanjing 210094, Jiangsu, P. R. China

Received:2005-07-18 Revised:2005-09-07 Online:2005-11-23 Published:2005-11-23

摘要/Abstract

摘要： 采用溶胶-凝胶法制备了Yb掺杂TiO₂纳米光催化剂,并通过XRD和BET等手段进行了表征.以对苯二甲酸作为探针分子,结合化学荧光技术研究了光催化剂表面羟基自由基的生成;并以苯酚为光催化降解反应模型化合物,考察了光催化剂的活性.测定了苯酚在TiO₂和Yb掺杂TiO₂光催化剂上的吸附常数.结果表明:Yb掺杂使TiO₂的粒径减小,比表面积增大,同时导致羟基自由基的生成速率增大.Yb掺杂有利于反应底物在催化剂表面的吸附,Yb的最佳掺入量为Yb/Ti摩尔比=0.8%.

关键词: 光催化, 二氧化钛, 镱, 掺杂, 苯酚

Abstract: Yb/Ti samples were prepared by sol-gel process and characterized by means of XRD and BET.After doped with Yb,the particle diameter of catalyst was decreased,the specific surface area was increased,the formation rate of hydroxyl radical on the catalyst was increased,and the catalytic activity was improved.Using phenol as the model compound of the photocatalytic degradation reaction,the activity of the prepared photocatalysts was investigated in suspension irradiated by high-pressure mercury lamp.The hydroxyl radical produced in the supernatant of the irradiated catalyst suspension containing terephthalic acid were also investigated by measuring the fluorescence derived by the reaction with terephthalic acid.As the result showed,the addition of Yb to TiO₂ notably enhanced its photocatalytic activity.The adsorption constants of phenol on the Yb doped catalysts and the nonmodified TiO₂ catalyst were evaluated,and the result showed the adsorption of phenol on the Yb/Ti catalysts was improved.The optimum loading amount of Yb ion is 0.8%(molar ratio).

Key words: photocatalysis, TiO₂, Yb, doping, phenol

中图分类号:

O643

李慧泉, 陈伟凡, 马继龙, 崔玉民. 掺杂Yb的TiO₂光催化剂的制备和性能[J]. 影像科学与光化学, 2005, 23(6): 453-459.

LI Hui-quan, CHEN Wei-fan, MA Ji-long, CUI Yu-min. Preparation and Properties of Yb Doped TiO₂ Photocatalysts[J]. Imaging Science and Photochemistry, 2005, 23(6): 453-459.

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掺杂Yb的TiO₂光催化剂的制备和性能

Preparation and Properties of Yb Doped TiO₂ Photocatalysts

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