Title

Hydrogen Production and Characterization of MLaSrNb2NiO9 (M = Na, Cs, H) Based Photocatalysts

Authors

Authors

W. F. Yao; C. P. Huang;J. H. Ye

Comments

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Abbreviated Journal Title

Chem. Mat.

Keywords

VISIBLE-LIGHT IRRADIATION; PEROVSKITE STRUCTURE; TANTALATE; PHOTOCATALYSTS; WATER; O-2; H-2; DECOMPOSITION; NICKEL; OXIDES; RAMAN; Chemistry, Physical; Materials Science, Multidisciplinary

Abstract

Novel photocatalysts MLaSrNb2NiO9 (M = Na, Cs, H) were prepared for H-2 evolution from an aqueous methanol solution under both UV and visible light (> 420 nm) irradiation. CsLaSrNb2NiO9 (CNO) with a 2D layered structure (similar to that of CsCa2Nb3O10) shows a much higher activity than the NaLaSrNb2NiO9 (NNO) photocatalyst that consists of a 3D cubic perovskite crystal structure (ABO(3)). Experimental results show that Cs ions in CNO can be replaced by protons using a 1.0 M HNO3 solution, forming a new photocatalyst, HLaSrNb2NiO9 (HNO), whereas Na+ in NNO cannot be exchanged by H+ under the same conditions. Results show that partially exchanging Cs ions with protons significantly improves the photocatalytic activity of CNO-based photocatalyst. It is found that the higher activities of CNO and HNO compared with that of NNO are attributed to larger surface areas and the 2D layered structure.

Journal Title

Chemistry of Materials

Volume

22

Issue/Number

3

Publication Date

1-1-2010

Document Type

Article

Language

English

First Page

1107

Last Page

1113

WOS Identifier

WOS:000274089600060

ISSN

0897-4756

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