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

    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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