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

被引：41

作者：

Yao, Weifeng ^{[2
]}

Huang, Cunping ^{[1
]}

Ye, Jinhua ^{[2
]}

机构：

[1] Univ Cent Florida, Florida Solar Energy Ctr, Cocoa, FL 32922 USA

[2] Natl Inst Mat Sci, Photocatalyt Mat Ctr, Tsukuba, Ibaraki 3050047, Japan

来源：

CHEMISTRY OF MATERIALS | 2010年 / 22卷 / 03期

关键词：

VISIBLE-LIGHT IRRADIATION; PEROVSKITE STRUCTURE; TANTALATE PHOTOCATALYSTS; WATER; O-2; H-2; DECOMPOSITION; NICKEL; OXIDES; RAMAN;

D O I：

10.1021/cm902137s

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：

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.

引用

页码：1107 / 1113

页数：7

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