The influence of the film thickness of nanostructured α-Fe2O3 on water photooxidation

被引：108

作者：

Souza, Flavio Leandro ^{[1
]}

Lopes, Kirian Pimenta ^{[1
]}

Longo, Elson ^{[1
]}

Leite, Edson Roberto ^{[1
]}

机构：

[1] Univ Fed Sao Carlos, Dept Chem, LIEC CDMDC, BR-13565905 Sao Carlos, SP, Brazil

来源：

PHYSICAL CHEMISTRY CHEMICAL PHYSICS | 2009年 / 11卷 / 08期

基金：

巴西圣保罗研究基金会;

关键词：

HYDROGEN-PRODUCTION; THIN-FILMS; ELECTRODES; OXIDATION; HEMATITE; OXIDES; SI; TI;

D O I：

10.1039/b811946e

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：

The present work shows the influence of the film thickness in the optical and photoelectrochemical properties of nanostructured alpha-Fe2O3 thin film. We found that the film thickness has a strong influence on the optical absorption and the results here reported can help in the design of nanostructured alpha-Fe2O3 with superior performance for water photo-oxidation. The results show that the optical property of the hematite film is affected by the film thickness, probably due to the stress induced by the strong interaction between film and substrate. This stress generates defects in the crystal lattice of the hematite film, increasing the (e(-))-(h(+)) recombination process.

引用

页码：1215 / 1219

页数：5

共 18 条

[1] Epitaxially grown LiNbO3 thin films by polymeric precursor method [J].

Bouquet, V ;

Bernardi, MIB ;

Zanetti, SM ;

Leite, ER ;

Longo, E ;

Varela, JA ;

Viry, MG ;

Perrin, A .

JOURNAL OF MATERIALS RESEARCH, 2000, 15 (11) :2446-2453

[2] Translucent thin film Fe2O3 photoanodes for efficient water splitting by sunlight:: Nanostructure-directing effect of Si-doping [J].

Cesar, I ;

Kay, A ;

Martinez, JAG ;

Grätzel, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (14) :4582-4583

[3] ELECTROCHEMISTRY AND PHOTOELECTROCHEMISTRY OF IRON(III) OXIDE [J].

DAREEDWARDS, MP ;

GOODENOUGH, JB ;

HAMNETT, A ;

TREVELLICK, PR .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1983, 79 :2027-2041

[4] Visible light-induced water oxidation on mesoscopic α-Fe2O3 films made by ultrasonic spray pyrolysis [J].

Duret, A ;

Grätzel, M .

JOURNAL OF PHYSICAL CHEMISTRY B, 2005, 109 (36) :17184-17191

[5] ELECTROCHEMICAL PHOTOLYSIS OF WATER AT A SEMICONDUCTOR ELECTRODE [J].

FUJISHIMA, A ;

HONDA, K .

NATURE, 1972, 238 (5358) :37-+

[6] Enhancement of photoelectrochemical hydrogen production from hematite thin films by the introduction of Ti and Si [J].

Glasscock, Julie A. ;

Barnes, Piers R. F. ;

Plumb, Ian C. ;

Savvides, Nick .

JOURNAL OF PHYSICAL CHEMISTRY C, 2007, 111 (44) :16477-16488

[7] New benchmark for water photooxidation by nanostructured α-Fe2O3 films [J].

Kay, Andreas ;

Cesar, Ilkay ;

Graetzel, Michael .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2006, 128 (49) :15714-15721

[8] PHOTO-OXIDATION OF WATER AT ALPHA-FE2O3 ELECTRODES [J].

KENNEDY, JH ;

FRESE, KW .

JOURNAL OF THE ELECTROCHEMICAL SOCIETY, 1978, 125 (05) :709-714

[9] Structural, microstructural, and transport properties of highly oriented LaNiO3 thin films deposited on SrTiO3(100) single crystal [J].

Mambrini, G. P. ;

Leite, E. R. ;

Escote, M. T. ;

Chiquito, A. J. ;

Longo, E. ;

Varela, J. A. ;

Jardim, R. F. .

JOURNAL OF APPLIED PHYSICS, 2007, 102 (04)

[10] Photocatalysis for new energy production - Recent advances in photocatalytic water splitting reactions for hydrogen production [J].

Matsuoka, Masaya ;

Kitano, Masaaki ;

Takeuchi, Masato ;

Tsujimaru, Koichiro ;

Anpo, Masakazu ;

Thomas, John M. .

CATALYSIS TODAY, 2007, 122 (1-2) :51-61

← 1 2 →