Paper Title:
Immobilization of Nano-TiO2 on Expanded Perlite for Photocatalytic Degradation of Rhodamine B
  Abstract

Expanded perlite (EP) modified titanium dioxide (TiO2) with different loading times were prepared by Sol-Gel 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 EP-nanoTiO2 (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 photocatalyst has a higher activity and stability to degrade RhB in aqueous solution.

  Info
Periodical
Chapter
Chapter 19: Nanofabrication, Nanometrology and Applications
Edited by
Wu Fan
Pages
3795-3800
DOI
10.4028/www.scientific.net/AMM.110-116.3795
Citation
X. Z. Wang, W. W. Yong, W. Q. Yin, K. Feng, R. Guo, "Immobilization of Nano-TiO2 on Expanded Perlite for Photocatalytic Degradation of Rhodamine B", Applied Mechanics and Materials, Vols. 110-116, pp. 3795-3800, 2012
Online since
October 2011
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$32.00
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