Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 268, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.apcatb.2019.118439
Keywords
Noble metal-free; NiSe/Mn0.5Cd0.5S; Photocatalytic hydrogen production
Funding
- National Natural Science Foundation of China [U1662112, 21273038, 21543002, 11305091]
- Open Project Program of the State Key Laboratory of Photocatalysis on Energy and Environment [SKLPEE-KF201703, SKLPEE-KF201807]
- Fuzhou University
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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 Mn-0.5Cd0.5S with noble metal-free NiSe by an in-situ hydrothermal synthesis. The as-obtained NiSe/Mn-0.5Cd0.5S nanocomposites exhibited highly efficient photocatalytic H-2 production under visible light and the highest hydrogen generation rate reaches 28.08 mmol/h/g, which is higher than that of Mn-0.5Cd0.5S (13.71 mmol/h/g) and 1 wt% Pt/Mn-0.5Cd0.5S (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 wellmatched structure between NiSe and Mn-0.5Cd0.5S, which facilitates the charge transfer and prolongs the lifetime of photo-induced electrons, and thus improves photocatalytic activity.
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