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Citation: ZHOU Xue-Feng, LI Wei, ZHANG Yan, YANG Zhu-Hong, FENG Xin, LU Xiao-Hua. Hole Oxidation on TiO₂ Films in Aqueous Solutions Studied by Using OTS SAMs as a Probe[J]. Acta Physico-Chimica Sinica, ;2007, 23(07): 1113-1116. doi: 10.3866/PKU.WHXB20070729 shu

Hole Oxidation on TiO₂ Films in Aqueous Solutions Studied by Using OTS SAMs as a Probe

1.
Department of Chemistry and Chemical Engineering, Nanjing University of Technology, Nanjing 210009, P. R. China

Received Date: 13 December 2006
Available Online: 29 April 2007

An approach was developed to investigate hole oxidation on TiO2 films in aqueous solutions by using octadecyltrichlorosilane (OTS) self-assembled monolayers (SAMs) as a probe, in which the adsorption and surface diffusion of the reactants were exculded. Under UV irradiation, the water contact angle of the OTS SAMs on TiO2 films in water decreased obviously. In the presence of hole scavengers, the decrease of water contact angle for the OTS SAMs on TiO2 films with UV irradiation was inhibited apparently, while the effect of·OH radical scavengers and fluoride on the decrease of water contact angle was very small. It indicated that direct hole oxidation played a major role in photocatalytic removal of alkyl chains on TiO2 films in aqueous solutions.
- Photocatalysis; Mechanism; Hole oxidation; Scavenger; SAMs
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沈阳化工大学材料科学与工程学院沈阳 110142

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Hole Oxidation on TiO2 Films in Aqueous Solutions Studied by Using OTS SAMs as a Probe

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通讯作者: 陈斌, bchen63@163.com

Hole Oxidation on TiO₂ Films in Aqueous Solutions Studied by Using OTS SAMs as a Probe