Surface modification and photosensitisation of TiO2 nanocrystalline films with ascorbic acid

被引：88

作者：

Xagas, AP

Bernard, MC

Hugot-Le Goff, A

Spyrellis, N

Loizos, Z

Falaras, P ^{[1
]}

机构：

[1] NCSR Demokritos, Inst Phys Chem, Athens 15310, Greece

[2] Univ Paris 06, CNRS, UPR 15, F-75252 Paris 05, France

[3] Natl Tech Univ Athens, Dept Chem Engn, Athens 15780, Greece

来源：

JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY | 2000年 / 132卷 / 1-2期

关键词：

ascorbic acid; TiO2; films; photosensitisation; AFM; sol-gel;

D O I：

10.1016/S1010-6030(00)00202-1

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：

Semi-transparent microporous TiO2 films on SnO2-coated conductive glass were prepared by applying a sol-gel process. Surface topography analysis was conducted with atomic force microscopy, which revealed a highly textured and rough surface, possessing a high capacity for adsorption of a diverse variety of compounds. Surface modification of the films with ascorbic acid results in the formation of a stable, coloured surface complex which red shifts the absorption threshold of TiO2, enhancing utilisation of the solar spectrum. Upon illumination in a liquid electrochemical cell, ascorbic acid injects electrons into the conduction band of the semiconductor, giving rise to electrical current. The incident-photon-to-current efficiency presents a maximum at 415nm (5.29%). (C) 2000 Elsevier Science S.A. All rights reserved.

引用

收藏

页码：115 / 120

页数：6

相关论文

共 31 条

[11] ELECTROCHROMISM OF SPUTTERED FLUORINATED TITANIUM-OXIDE THIN-FILMS [J].

GUTARRA, A ;

AZENS, A ;

STJERNA, B ;

GRANQVIST, CG .

APPLIED PHYSICS LETTERS, 1994, 64 (13) :1604-1606

[12] Photoelectrochemical studies on acid-doped polyaniline as sensitizer for TiO2 nanoporous film [J].

Hao, YZ ;

Yang, MZ ;

Yu, C ;

Cai, SM ;

Liu, MS ;

Fan, LZ ;

Li, YF .

SOLAR ENERGY MATERIALS AND SOLAR CELLS, 1998, 56 (01) :75-84

[13] Charge transfer in metal catalysts supported on doped TiO2: A theoretical approach based on metal-semiconductor contact theory [J].

Ioannides, T ;

Verykios, XE .

JOURNAL OF CATALYSIS, 1996, 161 (02) :560-569

[14]

JABS W, 1987, Z CHEM, V27, P301

[15] COMPOUNDS OF L(+)-ASCORBIC ACID WITH METALS .8. TITANIUM(IV) COMPLEXES OF L(+)-ASCORBIC ACID AND 5,6-O-ISOPROPYLIDENE-L-ASCORBIC ACID [J].

JABS, W ;

GAUBE, W ;

FEHL, C ;

LUKOWSKI, R .

INORGANICA CHIMICA ACTA, 1990, 175 (02) :273-276

[16] STUDY OF NANOCRYSTALLINE TIO2 (ANATASE) ELECTRODE IN THE ACCUMULATION REGIME [J].

KAVAN, L ;

KRATOCHVILOVA, K ;

GRATZEL, M .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1995, 394 (1-2) :93-102

[17] MOLECULAR-LEVEL ELECTRON-TRANSFER AND EXCITED-STATE ASSEMBLIES ON SURFACES OF METAL-OXIDES AND GLASS [J].

MEYER, TJ ;

MEYER, GJ ;

PFENNIG, BW ;

SCHOONOVER, JR ;

TIMPSON, CJ ;

WALL, JF ;

KOBUSCH, C ;

CHEN, XH ;

PEEK, BM ;

WALL, CG ;

OU, W ;

ERICKSON, BW ;

BIGNOZZI, CA .

INORGANIC CHEMISTRY, 1994, 33 (18) :3952-3964

[18] IMPORTANCE OF BINDING STATES BETWEEN PHOTOSENSITIZING MOLECULES AND THE TIO2 SURFACE FOR EFFICIENCY IN A DYE-SENSITIZED SOLAR-CELL [J].

MURAKOSHI, K ;

KANO, G ;

WADA, Y ;

YANAGIDA, S ;

MIYAZAKI, H ;

MATSUMOTO, M ;

MURASAWA, S .

JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 1995, 396 (1-2) :27-34

[19] CONVERSION OF LIGHT TO ELECTRICITY BY CIS-X2BIS(2,2'-BIPYRIDYL-4,4'-DICARBOXYLATE)RUTHENIUM(II) CHARGE-TRANSFER SENSITIZERS (X = CL-, BR-, I-, CN-, AND SCN-) ON NANOCRYSTALLINE TIO2 ELECTRODES [J].

NAZEERUDDIN, MK ;

KAY, A ;

RODICIO, I ;

HUMPHRYBAKER, R ;

MULLER, E ;

LISKA, P ;

VLACHOPOULOS, N ;

GRATZEL, M .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 1993, 115 (14) :6382-6390

[20] CONVERSION OF LIGHT INTO ELECTRICITY WITH TRINUCLEAR RUTHENIUM COMPLEXES ADSORBED ON TEXTURED TIO2 FILMS [J].

NAZEERUDDIN, MK ;

LISKA, P ;

MOSER, J ;

VLACHOPOULOS, N ;

GRATZEL, M .

HELVETICA CHIMICA ACTA, 1990, 73 (06) :1788-1803

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