Kinetics of Nano-Sm-N-P-TiO2 Induced Photocatalytic Degradation of 4-Chlorophenol Under Simulated Sunlight Irradiation

doi:10.3724/SP.J.1095.2014.30201

Chinese Journal of Applied Chemistry

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Kinetics of Nano-Sm-N-P-TiO₂ Induced Photocatalytic Degradation of 4-Chlorophenol Under Simulated Sunlight Irradiation

WANG Qingyuan, JIANG Hongquan^*, LI Jingshen, WANG Qiaofeng, LI Zhenyu

(Key Laboratory of Design and Synthesis of Functional Materials and Green Catalysis,
Colleges of Heilongjiang Province,Harbin Normal University,Harbin 150025,China)

Received:2013-04-23 Revised:2013-05-28 Published:2014-03-10 Online:2014-03-10
Contact: Jiang HongQuan

Abstract

Abstract: A novel high-performance Sm-N-P-TiO2 nano-photocatalyst was successfully prepared by a modified sol-hydrothermal technique. Influence of condition factors on the photocatalytic degradation of 4-chlorophenol(4-CP) solution under simulated sunlight irradiation was investigated. Comparative research on the photoactivities of different catalysts was also carried out. The degrading reaction fits the firstorder kinetics well under experimental conditions, and the degradation rate decreases with the increase of solution concentration. After irradiation under a 500 W Xenon lamp for 2 h, 4-CP completely decomposed with the first order reaction rate constant(Kapp) of 5.32×10-2 min-1 under the such conditions as initial concentration of 4-CP of 40 mg/L, Sm-N-P-TiO2 dosage of 1.5 g/L, pH value of 5.2, solution temperature of 36 ℃. The photoactivity of Sm-N-P-TiO2 is 3.49 times that of mixed-phase titania(P25). The TOC removal efficiency reaches 96.8%.

Key words: TiO2, Sm-N-P tridoping, chlorophenol, photocatalysis, kinetics

CLC Number:

O643.3

WANG Qingyuan, JIANG Hongquan*, LI Jingshen, WANG Qiaofeng, LI Zhenyu. Kinetics of Nano-Sm-N-P-TiO₂ Induced Photocatalytic Degradation of 4-Chlorophenol Under Simulated Sunlight Irradiation[J]. Chinese Journal of Applied Chemistry, DOI: 10.3724/SP.J.1095.2014.30201.

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Kinetics of Nano-Sm-N-P-TiO₂ Induced Photocatalytic Degradation of 4-Chlorophenol Under Simulated Sunlight Irradiation

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