標題: Intermediate inhibition in the heterogeneous UV-catalysis using a TiO2 suspension system
作者: Chan, YC
Chen, JN
Lu, MC
環境工程研究所
Institute of Environmental Engineering
關鍵字: 2-chlorophenol;Langmuir-Hinshelwood kinetic;photocatalysis;titanium dioxide
公開日期: 1-Oct-2001
摘要: Langmuir-Hinshelwood (L-H) kinetic expression was used to develop a basic mathematical model, which could describe the inhibition of intermediates in the photocatalysis of 2-chlorophenol (2-CP) in a suspended TiO2 system. Results showed that the photocatalytic oxidation of 2-chlorophenol followed the L-H type behavior and the reaction by-products displayed an inhibiting effect on the degradation rate. The inhibition was estimated by comparing to observed and estimated half-lives. The higher the initial concentration of 2-chlorophenol, the higher the inhibition of photocatalytic reaction. The L-H kinetic has been modified slightly in this study to rationalize the contrast of inhibited behavior and to improve in favor of a surface reaction. The concentrations of 2-chlorophenol were investigated ranging from 7.78 x 10(-5) to 7.78 x 10(-4) mol l(-1). The degradation of 2-chlorophenol in this reaction condition approximates a first-order kinetics to near-complete degradation. Calculated kinetic profiles are in an excellent agreement with the experimental observation. The results of the theoretical analysis can be used to estimate reaction rates in different initial concentrations of target compound. (C) 2001 Elsevier Science Ltd. All rights reserved.
URI: http://dx.doi.org/10.1016/S0045-6535(01)00009-1
http://hdl.handle.net/11536/29350
ISSN: 0045-6535
DOI: 10.1016/S0045-6535(01)00009-1
期刊: CHEMOSPHERE
Volume: 45
Issue: 1
起始頁: 29
結束頁: 35
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