Photocatalytic hydrogen production from aqueous methanol solutions under visible light over Na(BixTa1-x)O3 solid-solution

被引：85

作者：

Li, Zhonghua ^{[1
]}

Wang, Yanxin ^{[1
]}

Liu, Jiawen ^{[2
]}

Chen, Gang ^{[1
]}

Li, Yingxuan ^{[1
]}

Zhou, Chao ^{[1
]}

机构：

[1] Harbin Inst Technol, Sch Sci, Dept Chem, Harbin 150001, Peoples R China

[2] Harbin Normal Univ, Coll Chem & Chem Engn, Harbin 150025, Peoples R China

来源：

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY | 2009年 / 34卷 / 01期

基金：

中国国家自然科学基金;

关键词：

Visible light; Hydrothermal synthesis; Density functional calculations; Hydrogen production; Photocatalyst; TANTALATE PHOTOCATALYSTS; WATER; NATAO3; H-2; IRRADIATION; DECOMPOSITION; O-2; EVOLUTION; TEMPERATURE; PROPERTY;

D O I：

10.1016/j.ijhydene.2008.10.027

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：

A series of equivalent substitution solid-solution Na(BixTa1-x)O-3 (x = 0-0. 10) was prepared by a simple hydrothermal method using Ta2O5 and NaBiO3 as precursors. The Na (Bi0.08Ta0.92)O-3 photocatalyst exhibited the highest performance of H-2 evolution (59.48 mu mol h(-1) g(-1)) under visible-light irradiation (lambda > 400 nm) without co-catalyst, whereas no H-2 evolution is observed for NaTaO3 under the same conditions. The UV-Vis spectra indicate that the Na(Bi0.08Ta0.92)O-3 powders can absorb not only ultraviolet light like pure NaTaO3 powder but also the visible-light spectrum. The absorption edge corresponds to a band gap of 2.88 eV. The results of density functional theory calculation illuminate that the visible-light absorption bands in the Na(BixTa1-x)O-3 catalysts are attributed to the band transition from the O2p to the Bi2s + 2p + Ta5d hybrid orbital. (C) 2008 International Association for Hydrogen Energy. Published by Elsevier Ltd. All rights reserved.

引用

页码：147 / 152

页数：6

共 33 条

[21] Photocatalytic activity of (Ga1-xZnx)(N1-xOx) for visible-light-driven H2 and O2 evolution in the presence of sacrificial reagents [J].

Maeda, Kazuhiko ;

Hashiguchi, Hiroshi ;

Masuda, Hideaki ;

Abe, Ryu ;

Domen, Kazunari .

JOURNAL OF PHYSICAL CHEMISTRY C, 2008, 112 (09) :3447-3452

[22]

MAGGARD PA, 2007, Patent No. 2007039814

[23] Flux syntheses of La-doped NaTaO3 and its photocatalytic activity [J].

Porob, Digamber G. ;

Maggard, Paul A. .

JOURNAL OF SOLID STATE CHEMISTRY, 2006, 179 (06) :1727-1732

[24] OXIDE SEMICONDUCTORS IN PHOTOELECTROCHEMICAL CONVERSION OF SOLAR-ENERGY [J].

SCAIFE, DE .

SOLAR ENERGY, 1980, 25 (01) :41-54

[25] Studies on the enhanced photocatalytic hydrogen evolution over Pt/PEG-modified TiO2 photocatalysts [J].

Sun, Wei ;

Zhang, Shuqing ;

Liu, Zhixianq ;

Wang, Cheng ;

Mao, Zongqiang .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2008, 33 (04) :1112-1117

[26] Jahn-Teller distortion induced by Mg/Zn substitution on Mn sites in the perovskite manganites [J].

Tan, S ;

Yue, S ;

Zhang, YH .

PHYSICS LETTERS A, 2003, 319 (5-6) :530-538

[27] Efficient photocatalytic decomposition of acetaldehyde over a solid-solution perovskite (Ag0.75Sr0.25)(Nb0.75Ti0.25)O3 under visible-light irradiation [J].

Wang, Defa ;

Kako, Tetsuya ;

Ye, Jinhua .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2008, 130 (09) :2724-+

[28] H2 production with ultra-low CO selectivity via photocatalytic reforming of methanol on Au/TiO2 catalyst [J].

Wu, Guopeng ;

Chen, Tao ;

Su, Weiguang ;

Zhou, Guohua ;

Zong, Xu ;

Lei, Zhibin ;

Li, Can .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2008, 33 (04) :1243-1251

[29] Enhanced TiO2 photocatalysis by Cu in hydrogen production from aqueous methanol solution [J].

Wu, NL ;

Lee, MS .

INTERNATIONAL JOURNAL OF HYDROGEN ENERGY, 2004, 29 (15) :1601-1605

[30] Chemical synthesis of NaTaO3 powder at low-temperature [J].

Xu, JS ;

Xue, DF ;

Yan, CL .

MATERIALS LETTERS, 2005, 59 (23) :2920-2922

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