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

[1] LINEAR METHODS IN BAND THEORY [J].

ANDERSEN, OK .

PHYSICAL REVIEW B, 1975, 12 (08) :3060-3083

[2] Visible-light-driven NaTaO3-xNx catalyst prepared by a hydrothermal process [J].

Fu, Hongbo ;

Zhang, Shicheng ;

Zhang, Liwu ;

Zhu, Yongfa .

MATERIALS RESEARCH BULLETIN, 2008, 43 (04) :864-872

[3] INHOMOGENEOUS ELECTRON-GAS [J].

RAJAGOPAL, AK ;

CALLAWAY, J .

PHYSICAL REVIEW B, 1973, 7 (05) :1912-1919

[4] Influence of structural features on the photocatalytic activity of NaTaO3 powders from different synthesis methods [J].

Hu, Che-Chia ;

Teng, Hsisheng .

APPLIED CATALYSIS A-GENERAL, 2007, 331 (44-50) :44-50

[5] Decomposition of organic compounds over NaBiO3 under visible light irradiation [J].

Kako, Tetsuya ;

Zou, Zhigang ;

Katagiri, Masahiko ;

Ye, Jinhua .

CHEMISTRY OF MATERIALS, 2007, 19 (02) :198-202

[6] Water splitting into H2 and O2 on alkali tantalate photocatalysts ATaO3 (A = Li, Na, and K) [J].

Kato, H ;

Kudo, A .

JOURNAL OF PHYSICAL CHEMISTRY B, 2001, 105 (19) :4285-4292

[7] Photocatalytic decomposition of pure water into H2 and O2 over SrTa2O6 prepared by a flux method [J].

Kato, H ;

Kudo, A .

CHEMISTRY LETTERS, 1999, (11) :1207-1208

[8] New tantalate photocatalysts for water decomposition into H2 and O2 [J].

Kato, H ;

Kudo, A .

CHEMICAL PHYSICS LETTERS, 1998, 295 (5-6) :487-492

[9] Powder neutron diffraction study of the high temperature phase transitions in NaTaO3 [J].

Kennedy, BJ ;

Prodjosantoso, AK ;

Howard, CJ .

JOURNAL OF PHYSICS-CONDENSED MATTER, 1999, 11 (33) :6319-6327

[10] An undoped, single-phase oxide photocatalyst working under visible light [J].

Kim, HG ;

Hwang, DW ;

Lee, JS .

JOURNAL OF THE AMERICAN CHEMICAL SOCIETY, 2004, 126 (29) :8912-8913

← 1 2 3 4 →