Ag-doped Mn-Cd sulfide as a visible-light-driven photocatalyst for H2 evolution

被引：70
作者：
Ikeue, Keita [1 ]
Shinmura, Yumeki [1 ]
Machida, Masato [1 ]
机构：
[1] Kumamoto Univ, Dept Appl Chem & Biochem, Grad Sch & Technol, Kumamoto 8608555, Japan
来源：
APPLIED CATALYSIS B-ENVIRONMENTAL | 2012年 / 123卷
关键词：
H-2; production; Sulfide; Photocatalyst; Visible light response; Ag; Hydrothermal synthesis; SOLID-SOLUTION; HYDROGEN-PRODUCTION; AQUEOUS-SOLUTIONS; RECENT PROGRESS; MORPHOLOGY; OXYGEN; CU;
D O I：
10.1016/j.apcatb.2012.04.019
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：
We have investigated the role of Ag in the AgyMn1-x-yCdxS during photocatalytic H-2 evolution under visible light irradiation (lambda > 420 nm). The rate of H-2 evolution increased with the amount of Ag doping, and reached a maximum at y = 0.003 (x = 0.40). AgyMn1-x-yCdxS consisted of a highly crystalline solid solution phase over the range 0.48 <= x <= 0.63 and 0 <= y <= 0.02, suggesting that the effect of Ag on the photocatalytic activity is not associated with crystallinity. UV-vis absorption spectra of AgyMn1-x-yCdxS showed a band gap absorption at 500 nm and a flat absorption above 500 nm. The latter absorption was caused by the presence of Ag2S, which does not significantly contribute to the photocatalytic activity. X-ray photoelectron spectroscopy detected metallic Ag on the surface of Ag0.003Mn0.40Cd0.60S, which could act as a co-catalyst in photocatalytic hydrogen evolution. (C) 2012 Elsevier B.V. All rights reserved.
引用
收藏
页码：84 / 88
页数：5
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