Hole oxidation on TiO2 films in aqueous solutions studied by using OTS SAMs as a probe

Xue Feng Zhou; Wei Li; Yan Zhang; Zhu Hong Yang; Xin Feng; Xiao Hua Lu

Hole oxidation on TiO₂ films in aqueous solutions studied by using OTS SAMs as a probe

Xue Feng Zhou, Wei Li, Yan Zhang, Zhu Hong Yang, Xin Feng, Xiao Hua Lu

College of Chemical Engineering

Nanjing Tech University

Research output: Contribution to journal › Article › peer-review

2 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	1113-1116
Number of pages	4
Journal	Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica
Volume	23
Issue number	7
State	Published - 2007

Keywords

Hole oxidation
Mechanism
Photocatalysis
SAMs
Scavenger

Cite this

@article{abed131ce3de4c5c89d6995d21bf73ac,

title = "Hole oxidation on TiO2 films in aqueous solutions studied by using OTS SAMs as a probe",

abstract = "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.",

keywords = "Hole oxidation, Mechanism, Photocatalysis, SAMs, Scavenger",

author = "Zhou, {Xue Feng} and Wei Li and Yan Zhang and Yang, {Zhu Hong} and Xin Feng and Lu, {Xiao Hua}",

year = "2007",

language = "英语",

volume = "23",

pages = "1113--1116",

journal = "Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica",

issn = "1000-6818",

publisher = "Elsevier B.V.",

number = "7",

}

TY - JOUR

T1 - Hole oxidation on TiO2 films in aqueous solutions studied by using OTS SAMs as a probe

AU - Zhou, Xue Feng

AU - Li, Wei

AU - Zhang, Yan

AU - Yang, Zhu Hong

AU - Feng, Xin

AU - Lu, Xiao Hua

PY - 2007

Y1 - 2007

N2 - 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.

AB - 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.

KW - Hole oxidation

KW - Mechanism

KW - Photocatalysis

KW - SAMs

KW - Scavenger

UR - http://www.scopus.com/inward/record.url?scp=70049107590&partnerID=8YFLogxK

M3 - 文章

AN - SCOPUS:70049107590

SN - 1000-6818

VL - 23

SP - 1113

EP - 1116

JO - Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica

JF - Wuli Huaxue Xuebao/ Acta Physico - Chimica Sinica

IS - 7

ER -

Hole oxidation on TiO₂ films in aqueous solutions studied by using OTS SAMs as a probe

Abstract

Keywords

Other files and links

Fingerprint

Cite this