Photoelectrochemical Properties of Crystalline Perovskite Lanthanum Titanium Oxynitride Films under Visible Light

被引:107
作者
Le Paven-Thivet, Claire [1 ]
Ishikawa, Akio [2 ]
Ziani, Ahmed [1 ]
Le Gendre, Laurent [1 ]
Yoshida, Masaaki [2 ]
Kubota, Jun [2 ]
Tessier, Franck [3 ]
Doment, Kazunari [2 ]
机构
[1] Univ Rennes 1, Grp Antennes & Hyperfrequences, IETR, CNRS,IUT St Brieuc,UMR 6164, F-22004 St Brieuc, France
[2] Univ Tokyo, Dept Chem Syst Engn, Bunkyo Ku, Tokyo 1138650, Japan
[3] Univ Rennes 1, Equipe Verres & Ceram, Unite Sci Chim Rennes, CNRS,UMR 6226, F-35042 Rennes, France
关键词
(LA; SR)TI(O; N)(3); THIN-FILMS; PHOTOCATALYTIC DECOMPOSITION; DIELECTRIC-PROPERTIES; HYDROGEN-PRODUCTION; WATER; IRRADIATION; DEPOSITION; GROWTH; EVOLUTION; CATALYSTS;
D O I
10.1021/jp811100r
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
Thin films of the lanthanum titanium oxynitride perovskite (LaTiOxNy) synthesized by reactive radio-frequency sputtering on conductive Nb-doped strontium titanate (Nb:SrTiO3) substrates are evaluated as photoelectrodes for water splitting reaction under visible light. The films are characterized by X-ray diffraction analysis, energy-dispersive spectroscopy, scanning electron and atomic force microscopy, and ultraviolet-visible spectroscopy. Thin films with polycrystalline, oriented, or epitaxial structures are obtained depending on the substrate temperature and plasma composition. The band-gap energies of the films thus prepared are in the range 2.05-2.35 eV. Photoelectrochemical measurements reveal that the photoactivity of these films increases with the quality of film crystallization. The flat-band position of LaTiOxNy is found to change with pH of the reactant solution. Surface modification with colloidal IrO2 is also demonstrated to result in a marked increase in photoactivity, with the modified epitaxial LaTiOxNy film exhibiting a photocurrent density of ca. 70 mu A cm(-2) at + 1.0 V vs. Ag/AgCl at pH 4.5 in aqueous Na2SO4 solution under irradiation at visible wavelengths (lambda > 420 nm).
引用
收藏
页码:6156 / 6162
页数:7
相关论文
共 36 条
[1]   Photocatalytic decomposition of acetone using LaTi(O,N)3 nanoparticles under visible light irradiation [J].
Aguiar, Rosiana ;
Kalytta, Andreas ;
Reller, Armin ;
Weidenkaff, Anke ;
Ebbinghaus, Stefan G. .
JOURNAL OF MATERIALS CHEMISTRY, 2008, 18 (36) :4260-4265
[2]   Physical properties of (La,Sr)Ti(O,N)3 thin films grown by pulsed laser deposition [J].
Aguiar, Rosiana ;
Logvinovich, Dmitry ;
Weidenkaff, Anke ;
Karl, Helmut ;
Schneider, Christof W. ;
Reller, Armin ;
Ebbinghaus, Stefan G. .
MATERIALS RESEARCH BULLETIN, 2008, 43 (06) :1376-1383
[3]   Synthesis and properties of oxynitrides (La,Sr)Ti(O,N)3 thin films [J].
Aguiar, Rosiana ;
Weidenkaff, Anke ;
Schneider, Christof W. ;
Reller, Armin ;
Ebbinghaus, Stefan G. .
PROGRESS IN SOLID STATE CHEMISTRY, 2007, 35 (2-4) :291-298
[4]   Visible-light photocatalysis in nitrogen-doped titanium oxides [J].
Asahi, R ;
Morikawa, T ;
Ohwaki, T ;
Aoki, K ;
Taga, Y .
SCIENCE, 2001, 293 (5528) :269-271
[5]   Optical properties of the perovskite solid solution LaTiO2N-ATiO3 (A = Sr, Ba) [J].
Cheviré, F ;
Tessier, F ;
Marchand, R .
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY, 2006, 6 (06) :1223-1230
[6]   PHOTOOXIDATION OF WATER SENSITIZED BY WO3 POWDER [J].
DARWENT, JR ;
MILLS, A .
JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS II, 1982, 78 :359-367
[7]   PHOTODECOMPOSITION OF WATER AND HYDROGEN EVOLUTION FROM AQUEOUS METHANOL SOLUTION OVER NOVEL NIOBATE PHOTOCATALYSTS [J].
DOMEN, K ;
KUDO, A ;
SHINOZAKI, A ;
TANAKA, A ;
MARUYA, K ;
ONISHI, T .
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1986, (04) :356-357
[8]   PHOTOCATALYTIC DECOMPOSITION OF WATER-VAPOR ON AN NIO-SRTIO3 CATALYST [J].
DOMEN, K ;
NAITO, S ;
SOMA, M ;
ONISHI, T ;
TAMARU, K .
JOURNAL OF THE CHEMICAL SOCIETY-CHEMICAL COMMUNICATIONS, 1980, (12) :543-544
[9]   Topotactical growth of thick perovskite oxynitride layers by nitridation of single crystalline oxides [J].
Ebbinghaus, Stefan G. ;
Aguiar, Rosiana ;
Weidenkaff, Anke ;
Gsell, Stefan ;
Reller, Armin .
SOLID STATE SCIENCES, 2008, 10 (06) :709-716
[10]   Growth and characterization of ferroelectric LaTiO3.5 thin films [J].
Fompeyrine, J ;
Seo, JW ;
Locquet, JP .
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY, 1999, 19 (6-7) :1493-1496