Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 44, Issue 33, Pages 18123-18133Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2019.03.106
Keywords
NiCr2O4; Al-MCM-41; Photocatalytic hydrogen production
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Funding
- National Natural Science Foundation of China [51274138, 50974086, 50704023]
- Innovation Program of Shanghai Municipal Education Commission [14YZ014]
- Program for Innovative Research Team in University [IRT13078]
- China Scholarship Council
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A novel photocatalyst NiCr2O4/Al-MCM-41, using Al-MCM-41 zeolite as a support loaded with NiCr2O4 was successfully prepared by a facile sol-gel method and followed by calcination at 700 degrees C. The photocatalytic hydrogen production through water splitting was tested under visible-light irradiation for 3 h. According to the results of hydrogen evolution, the NiCr2O4/Al-MCM-41 hybrid composite displayed higher hydrogen production compared with individual NiCr2O4 or Al-MCM-41. This revealed that NiCr2O4 incorporated into the Al-MCM-41 zeolite effectively facilitated the photocatalytic activity. The highest hydrogen generation was obtained from 50%NiCr2O4/Al-MCM-41, whose hydrogen generation (8.92 mmol/g) was enhanced up to 2.4 times as much as individual NiCr2O4 (3.75 mmol/g). The main reason for the enhanced photocatalytic activity of the hybrid photocatalysts was ascribed to the excellent synergistic effect of NiCr2O4 and Al-MCM-41 zeolite. The mesoporous Al-MCM-41 catalyst support increased the dispersion of NiCr2O4 with more active sites. In addition, Al-MCM-41 zeolite promoted the charge transfer and inhibited the rapid recombination of photo-generated electrons-holes as electron acceptor and donor. (C) 2019 Hydrogen Energy Publications LLC. Published by Elsevier Ltd. All rights reserved.
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