光催化
光致发光
材料科学
制氢
纳米复合材料
贵金属
热液循环
可见光谱
化学工程
分解水
半导体
带隙
金属
催化作用
复合材料
化学
光电子学
冶金
工程类
生物化学
作者
Xinwei Jiang,Haisheng Gong,Qiuwen Liu,Mingxia Song,Caijin Huang
标识
DOI:10.1016/j.apcatb.2019.118439
摘要
MnxCd1-xS solid solution is an emerging semiconductor for photocatalytic water splitting with a tunable bandgap. However, it still leaves much room to improve the photocatalytic activity. Herein, we modified Mn0.5Cd0.5S with noble metal-free NiSe by an in-situ hydrothermal synthesis. The as-obtained NiSe/Mn0.5Cd0.5S nanocomposites exhibited highly efficient photocatalytic H2 production under visible light and the highest hydrogen generation rate reaches 28.08 mmol/h/g, which is higher than that of Mn0.5Cd0.5S (13.71 mmol/h/g) and 1 wt% Pt/Mn0.5Cd0.5S (24.22 mmol/h/g). Through the detailed analyses of UV–vis DRS, photoluminescence (PL) spectra, time-resolved photoluminescence (TRPL) and photoelectrochemical tests, we found the well-matched structure between NiSe and Mn0.5Cd0.5S, which facilitates the charge transfer and prolongs the lifetime of photo-induced electrons, and thus improves photocatalytic activity.
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