引用本文:
【打印本页】   【HTML】   【下载PDF全文】   View/Add Comment  【EndNote】   【RefMan】   【BibTex】
←前一篇|后一篇→ 过刊浏览    高级检索
本文已被:浏览 997次   下载 926 本文二维码信息
码上扫一扫!
分享到: 微信 更多
Effect of Cobalt Precursor on Microstructures and Visible Light Photoactivity of Doped TiO2 Powders
Jing-ying Shi,Wen-hua Leng*,Jiang-lin Cao,Jian-qing Zhang,Chu-nan Cao
Author NameAffiliationE-mail
Jing-ying Shi Department of Chemistry, Yuquan Campus, Zhejiang University, Hangzhou 310027, China;Department of Chemistry, Quanzhou Normal College, Quanzhou 362000, China  
Wen-hua Leng* Department of Chemistry, Yuquan Campus, Zhejiang University, Hangzhou 310027, China lengwh@css.zju.edu.cn; Tel: 0571-87952318 
Jiang-lin Cao Department of Chemistry, Yuquan Campus, Zhejiang University, Hangzhou 310027, China  
Jian-qing Zhang Department of Chemistry, Yuquan Campus, Zhejiang University, Hangzhou 310027, China  
Chu-nan Cao Department of Chemistry, Yuquan Campus, Zhejiang University, Hangzhou 310027, China  
Abstract:
In order to develop photoactive cobalt-doped TiO2 for the degradation of organic pollutants using visible light irradiation, the effects of cobalt precursor on TiO2 microstructure were investigated. Three cobaltprecursors, i.e. CoCl2, Co(NO3)2 and CoSO4 with two doping levels (nominally 1% and 10%), and two annealing temperatures (400 and 800 ℃) were adopted to prepare the doped titania through the sol-gel method. The powder samples were characterized with XRD, SEM, BET surface area analysis and UV-Vis absorption spectroscopy, and their photocatalytic activities were evaluated by the degradation of aniline under visible light irradiation. The results showed that the distribution of titania phases, particle size,morphology, surface area and the optical absorption of the catalysts were greatly dependent on the cobalt precursors. Samples prepared from Co(NO3)2, especially for those doped at 1% and calcined at 400 ℃,showed the highest photocatalytic activity towards the degradation of aniline, and the possible reasons are discussed briefly.
Key words:  Cobalt precursor, Doped titania, Photocatalysis, Visible light
FundProject:
钴前驱体对掺杂TiO2微结构和可见光催化性能的影响
施晶莹  ,冷文华*    ,曹江林  ,张鉴清  ,曹楚南
摘要:
为发展可见光下破坏污染物的钴掺杂TiO2光催化剂,以CoCl2、Co(NO3)2和CoSO4为钴前驱体,采用溶胶-凝胶法制备了钴掺杂TiO2,通过X射线衍射、扫描电镜、BET表面积测试和紫外-可见吸收光谱对比研究了钴前驱体对样品的微观结构和吸光性能的影响.同时,以苯胺为降解目标物,比较了样品在可见光下的催化活性.结果表明,样品的TiO2晶相、形貌、比表面积和吸光性能都随着钴前驱体的不同而不同,其中以Co(NO3)2为前驱体制备得到的样品其光催化活性最高,特别是1%掺杂且400℃烧结得到的样品,并简要讨论了其可能原因.
关键词:  钴前驱体  掺杂TiO2  光催化  可见光
DOI:10.1360/cjcp2006.19(5).463.6
分类号: