One-electron oxidation of aromatic sulfides adsorbed on the surface of TiO2 particles studied by time-resolved diffuse reflectance spectroscopy

被引：27

作者：

Tachikawa, T ^{[1
]}

Tojo, S ^{[1
]}

Fujitsuka, M ^{[1
]}

Majima, T ^{[1
]}

机构：

[1] Osaka Univ, SANKEN, Ibaraki, Osaka 5650047, Japan

来源：

CHEMICAL PHYSICS LETTERS | 2003年 / 382卷 / 5-6期

关键词：

D O I：

10.1016/j.cplett.2003.10.110

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

One-electron oxidation of 4-methyl-p-tolylsulfide (NITS) and 4-methylthiophenylmethanol (MTPM) adsorbed on the surface of TiO2 powder slurried in acetonitrile has been investigated by the time-resolved diffuse reflectance spectroscopy. Relatively high concentration of the adsorbed MTPM determined by UV absorption spectral measurements clearly indicates that the -OH group of MTPM plays an important role in adsorbing on the surface of TiO2 particles. The initial concentration of the radical cations of substrates generated from one-electron oxidation with valence band holes or trapped hydroxyl radical significantly depended on the substrate concentration adsorbed on the TiO2 surface. (C) 2003 Elsevier B.V. All rights reserved.

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页码：618 / 625

页数：8

相关论文

共 24 条

[11] Generation and reactivity of aromatic thioether radical cations in aqueous solution as studied by pulse radiolysis [J].

Ioele, M ;

Steenken, S ;

Baciocchi, E .

JOURNAL OF PHYSICAL CHEMISTRY A, 1997, 101 (16) :2979-2987

[12] PHOTOCHEMISTRY ON NONREACTIVE AND REACTIVE (SEMICONDUCTOR) SURFACES [J].

KAMAT, PV .

CHEMICAL REVIEWS, 1993, 93 (01) :267-300

[13] PHOTOELECTROCHEMISTRY IN PARTICULATE SYSTEMS .9. PHOTOSENSITIZED REDUCTION IN A COLLOIDAL TIO2 SYSTEM USING ANTHRACENE-9-CARBOXYLIC ACID AS THE SENSITIZER [J].

KAMAT, PV .

JOURNAL OF PHYSICAL CHEMISTRY, 1989, 93 (02) :859-864

[14] DIFFUSE REFLECTANCE TRIPLET-TRIPLET ABSORPTION-SPECTROSCOPY OF AROMATIC-HYDROCARBONS CHEMISORBED ON NU-ALUMINA [J].

KESSLER, RW ;

WILKINSON, F .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1981, 77 :309-320

[15]

Miller R.J.D., 1995, Surface Electron Transfer Processes

[16] An overview of semiconductor photocatalysis [J].

Mills, A ;

LeHunte, S .

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY, 1997, 108 (01) :1-35

[17] Spectral, kinetics, and redox studies on the transients formed on pulse radiolysis of aqueous solution of (4-methylthiophenyl)methanol [J].

Mohan, H ;

Mittal, JP .

BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 2001, 74 (09) :1649-1659

[18] SURFACE COMPLEXATION OF COLLOIDAL SEMICONDUCTORS STRONGLY ENHANCES INTERFACIAL ELECTRON-TRANSFER RATES [J].

MOSER, J ;

PUNCHIHEWA, S ;

INFELTA, PP ;

GRATZEL, M .

LANGMUIR, 1991, 7 (12) :3012-3018

[19] CHARGE CARRIER TRAPPING AND RECOMBINATION DYNAMICS IN SMALL SEMICONDUCTOR PARTICLES [J].

ROTHENBERGER, G ;

MOSER, J ;

GRATZEL, M ;

SERPONE, N ;

SHARMA, DK .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1985, 107 (26) :8054-8059

[20] SUBNANOSECOND RELAXATION DYNAMICS IN TIO2 COLLOIDAL SOLS (PARTICLE SIZES R(P)=1.0-13.4 NM) - RELEVANCE TO HETEROGENEOUS PHOTOCATALYSIS [J].

SERPONE, N ;

LAWLESS, D ;

KHAIRUTDINOV, R ;

PELIZZETTI, E .

JOURNAL OF PHYSICAL CHEMISTRY, 1995, 99 (45) :16655-16661