Immobilization of nano-TiO2 on Expanded Perlite for Photocatalytic Degradation of Rhodamine B

摘要：

Expanded perlite (EP) modified titanium dioxide (TiO 2) with different loading times were prepared by SolGel method. Photocatalytic degradation kinetics of Rhodamine B (RhB) in polluted water by the materials (EP-nanoTiO2), as well as the effects of different loading times and the initial concentration of RhB on photocatalysis rate were examined. The catalytic activity of the regenerated photocatalyst was also tested. The results showed that photocatalyst modified three times with TiO2 had the highest catalytic activity. Degradation ratio of RhB by EPnanoTiO2 (modified three times) under irradiation for 6 h were 98.0％, 75.6％ and 63.2％ for 10 mg/L, 20 mg/L and 30 mg/L, respectively.The photocatalyst activity has little change after the five times recycling, and the degradation rate of RhB decreased less than 8％. The reaction of photocatalysis for RhB with irradiation time can be expressed as first-order kinetic mode within the initial concentration range of RhB between 10mg/L and 30 mg/L. EP-nanoTiO2 pho tocatalyst has a higher activity and stability to degrade RhB in aqueous solution.

关键词： Expanded perlite TiO2 photocatalytic degradation rhodamine B regeneration

作者: Xiao-zhi Wang Wei-wei Yong Wei-qin Yin Ke Feng Rong Guo

作者单位: Yangzhou Technical Service Center for Agro-Environment Safety of Jiangsu Province/College of Environ Yangzhou Technical Service Center for Agro-Environment Safety of Jiangsu Province/College of Environ Yangzhou Technical Service Center for Agro-Environment Safety of Jiangsu Province/College of Environ College of Chemistry and Chemical Engineering, Yangzhou University, Yangzhou, 225009, China

会议类型: 国际会议

会议名称: 2010 International Conference on Nano Science and Technology(2010年IEEE纳米科技国际会议 ICNST2010)

会议地点: 成都

会议语种:英文

页码: 233-236

在线出版日期: 2010-12-17（万方平台首次上网日期，不代表论文的发表时间）