Study of Multi-Variable Grey Model on Kinetics of Methyl Orange Photodegradation Reaction by Sm-Doped TiO2

Abstract:

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Sm-doped TiO2 photocatalysts were prepared by doping samarium ions into TiO2 nanoparticles in a sol-gel process. The samples were characterized using transmission electron microscopy (TEM) and ultraviolet-visible diffuse reflectance spectroscopy (UV-vis DRS). Their photocatalytic activities were evaluated by photodegradation of methyl orange (MO) in water under UV or stimulant solar light irradiation. The kinetics of MO photodegradation was further studied using multi-variable grey model. The experimental results indicated that the Sm3+ doping reduced the crystallite size, and appropriate doping induced red-shift of the absorption profile of TiO2. It was also found that the red-shift and absorptivity decreased in the range of 350-500 nm with the increase of Sm3+ doping and the optimal doping concentration was 0.05 mol%. Furthermore, the effects of Sm3+ doping concentration, the calcinating temperature of the samples, and the illuminating light on the photocatalytic activity of TiO2 were well simulated using multi-variable grey model.

Info:

Periodical:

Advanced Materials Research (Volumes 236-238)

Edited by:

Zhong Cao, Yinghe He, Lixian Sun and Xueqiang Cao

Pages:

880-887

DOI:

10.4028/www.scientific.net/AMR.236-238.880

Citation:

F. Li et al., "Study of Multi-Variable Grey Model on Kinetics of Methyl Orange Photodegradation Reaction by Sm-Doped TiO2", Advanced Materials Research, Vols. 236-238, pp. 880-887, 2011

Online since:

May 2011

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$35.00

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