Direct observation of reactive trapped holes in TiO2 undergoing photocatalytic oxidation of adsorbed alcohols:: Evaluation of the reaction rates and yields

被引：307

作者：

Tamaki, Y ^{[1
]}

Furube, A ^{[1
]}

Murai, M ^{[1
]}

Hara, K ^{[1
]}

Katoh, R ^{[1
]}

Tachiya, M ^{[1
]}

机构：

[1] Natl Inst Adv Ind Sci & Technol, Tsukuba, Ibaraki 3058565, Japan

来源：

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY | 2006年 / 128卷 / 02期

关键词：

D O I：

10.1021/ja055866p

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

To investigate the primary process of photocatalytic oxidation of TiO2, interfacial charge-transfer reaction of trapped holes formed in nanocrystalline TiO2 films by UV irradiation was directly measured by highly sensitive femtosecond and nanosecond transient absorption spectroscopy under low intensity excitation condition to avoid fast electron-hole recombination. Accordingly, the rates and yields of photocatalytic oxidation of several alcohols adsorbed on TiO2 were evaluated successfully. Copyright © 2006 American Chemical Society.

引用

页码：416 / 417

页数：2

共 15 条

[1] Charge carrier dynamics at TiO2 particles: Reactivity of free and trapped holes [J].

Bahnemann, DW ;

Hilgendorff, M ;

Memming, R .

JOURNAL OF PHYSICAL CHEMISTRY B, 1997, 101 (21) :4265-4275

[2] Direct observation of interfacial hole transfer from a photoexcited TiO2 particle to an adsorbed molecule SCN- by femtosecond diffuse reflectance spectroscopy [J].

Furube, A ;

Asahi, T ;

Masuhara, H ;

Yamashita, H ;

Anpo, M .

RESEARCH ON CHEMICAL INTERMEDIATES, 2001, 27 (1-2) :177-187

[3] Transient absorption studies and numerical modeling of iodine photoreduction by nanocrystalline TiO2 films [J].

Green, ANM ;

Chandler, RE ;

Haque, SA ;

Nelson, J ;

Durrant, JR .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (01) :142-150

[4] Highly efficient photon-to-electron conversion with mercurochrome-sensitized nanoporous oxide semiconductor solar cells [J].

Hara, K ;

Horiguchi, T ;

Kinoshita, T ;

Sayama, K ;

Sugihara, H ;

Arakawa, H .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 2000, 64 (02) :115-134

[5] Ultrafast charge transfer at TiO2/SCN- (aq) interfaces investigated by femtosecond transient reflecting grating method [J].

Morishita, T ;

Hibara, A ;

Sawada, T ;

Tsuyumoto, I .

JOURNAL OF PHYSICAL CHEMISTRY B, 1999, 103 (29) :5984-5987

[6]

Robinson JW, 1974, HDB SPECTROSCOPY, V1, P257

[7] Ultraviolet photoelectron spectroscopy of nanocrystalline TiO2 films sensitized with (2,2′-bipyridyl)ruthenium(II) dyes for photovoltaic applications [J].

Snook, JH ;

Samuelson, LA ;

Kumar, J ;

Kim, YG ;

Whitten, JE .

ORGANIC ELECTRONICS, 2005, 6 (02) :55-64

[8]

TAMAKI Y, IN PRESS C R CHIM

[9] Structure and energetics of water adsorbed at TiO2 anatase (101) and (001) surfaces [J].

Vittadini, A ;

Selloni, A ;

Rotzinger, FP ;

Gratzel, M .

PHYSICAL REVIEW LETTERS, 1998, 81 (14) :2954-2957

[10] Direct observation of competitive adsorption between methanol and water on TiO2:: An in situ sum-frequency generation study [J].

Wang, CY ;

Groenzin, H ;

Shultz, MJ .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (26) :8094-8095

← 1 2 →