Journal
NEW JOURNAL OF CHEMISTRY
Volume 43, Issue 16, Pages 6411-6421Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c9nj00553f
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Funding
- Chinese National Natural Science Foundation [41663012, 21862002]
- new technology and system for clean energy catalytic production, Major scientific project of North Minzu University [ZDZX201803]
- Ningxia low-grade resource high value utilization and environmental chemical integration technology innovation team project, North Minzu University
- Key Laboratory for the development and application of electrochemical energy conversion technology, North Minzu University
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Improving the efficiency of charge separation is an important aspect in photocatalysis. In this work, the hybrid nanostructure of -Ni(OH)(2)/Zn0.5Cd0.5S has been prepared by a simple two-step method for the first time. Here, designed/constructed with -Ni(OH)(2) over Zn-Cd-S, the catalyst efficiently boosts hydrogen evolution in photocatalytic hydrogen production. With a 25% content of -Ni(OH)(2) in the ZSN25 composite under visible light ( 420 nm) irradiation, remarkable hydrogen production of 22.45 mmol g(-1) h(-1) has been achieved. In addition, we found that the activities could be improved by means of controlling the formation of -Ni(OH)(2) species. The reason is that the interface between -Ni(OH)(2) and Zn0.5Cd0.5S provides a fast charge transfer channel to reduce the recombination of photogenerated carrier. Also, the formation of this interface is largely related to the content of -Ni(OH)(2). The Tafel slope, EIS and PL spectra support enhanced photocatalytic energy in the -Ni(OH)(2)/Zn0.5Cd0.5S charge transfer state and faster hydrogen evolution kinetics. These nanocomposites of Zn0.5Cd0.5S modified by -Ni(OH)(2) are of great significance for renewable hydrogen generation technology.
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