Recent progress in the development of carbonate-intercalated Zn/Cr LDH as a novel photocatalyst for hydrogen evolution aimed at the utilization of solar light

被引:133
作者
Parida, Kulamani [1 ]
Mohapatra, Lagnamayee [1 ]
机构
[1] CSIR, Inst Minerals & Mat Technol, Colloids & Mat Chem Dept, Bhubaneswar 751013, Orissa, India
关键词
LAYERED DOUBLE HYDROXIDES; VISIBLE-LIGHT; WATER; AL; ADSORPTION;
D O I
10.1039/c1dt10957j
中图分类号
O61 [无机化学];
学科分类号
070301 ; 081704 ;
摘要
A series of novel photocatalysts Zn/Cr LDH with different Zn/Cr molar ratios (2 : 1, 3 : 1, 4 : 1 and 2 : 1-CO3) were fabricated by a co-precipitation method and evaluated for photodecomposition of water using visible light irradiation. Various characterization methods were employed to investigate the structures, morphologies and photocatalytic properties. In comparison to Zn/Cr (2 : 1) LDH, Zn/Cr-CO3 (2 : 1) LDH extends the absorption edges to the visible region and exhibits good photocatalytic activity, even without the assistance of co-catalysts. The visible light photocatalytic activity is ascribed to the charge transfer spectra of octahedral Cr ions in LDH. Zn/Cr-CO3 LDH shows enhanced photocatalytic activities compared to Zn/Cr LDH as carbonate ions oxidise by holes to form carbonate radicals, inhibit the rapid recombination of e(-)and h(+) charge carriers and thereby suppress the backward reaction to some extent. This work provides a detailed understanding of the semiconductor properties of LDHs for photocatalytical hydrogen evolution.
引用
收藏
页码:1173 / 1178
页数:6
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