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ISSN 1000-6818CN 11-1892/O6CODEN WHXUEU
Acta Phys Chim Sin >> 2001,Vol.17>> Issue(03)>> 278-281     doi: 10.3866/PKU.WHXB20010320         中文摘要
Mechnism of Photocatalytic Oxidation of Formaldehyde
Yang Jian-Jun;Li Dong-Xu;Li Qing-Lin;Zhang Zhi-Jun;Wang Han-Qing
Lanzhou Institute of Chemical Physics,Chinese Academy of Science,Lanzhou 730000;Key Lab of Lubrication and Functional Materials,Henan University,Kaifeng 475001
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The adsorption state of reactants,free radical intermediates and the r eaction mechanism have been studied by means of temperature programmed descripti on (TPD),electron spin resonance (ESR) and spin trapingESR in the photocatalyt ic oxidation of formaldehyde.The results showed that O2 adsorbed on the surface of photocatalyst could be reduced to •O-2 by photogenerated electrons and H2O could be oxidized to •OH by holes.Both free radicals are active oxidants in the reaction of photocatalytic oxidation of HCHO.The photocatalytic oxidation of HC HO carried out with two steps.Firstly,HCHO was oxidized into HCOOH,then HCOOH co nverted into final product of CO2 and H2O.

Keywords: Formaldehyde   Photocatalytic oxidation   Temperature programmed deso rption   Electron spin resonance  
Received: 2000-10-08 Accepted: 2000-11-21 Publication Date (Web): 2001-03-15
Corresponding Authors: Li Qing-Lin Email: qlli01@371.net


Cite this article: Yang Jian-Jun;Li Dong-Xu;Li Qing-Lin;Zhang Zhi-Jun;Wang Han-Qing. Mechnism of Photocatalytic Oxidation of Formaldehyde[J]. Acta Phys. -Chim. Sin., 2001,17 (03): 278-281.    doi: 10.3866/PKU.WHXB20010320
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