Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 40, Issue 14, Pages 4758-4765Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2015.02.055
Keywords
Layered double hydroxide; Nanosheets; Cadmium selenide; Hydrogen; Photocatalysis
Categories
Funding
- National Natural Science Foundation of China [21103054, 21003055, 50872037]
- Natural Science Foundation of Fujian Province, China [2014J01187]
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Mesoporous CdSe/ZnCr-LDH nanohybrids were synthesized by mixing the suspensions containing cationic ZnCr-LDH nanosheets and anionic CdSe nanosol. It was revealed that the CdSe nanocrystals were immobilized on the ZnCr-layered double hydroxide 2D nanosheets. The strong electronic coupling between the two components in the formed heterostructured nanohybrids remarkably suppressed the photogenerated electron-hole recombination. The as-prepared nanohybrids displayed significantly enhanced photocatalytic activity. When the CdSe content was 30 wt%, the H-2-evolution rate was 2196 mu mol h(-1).g(-1) with a quantum efficiency of 51.3% under visible-light irradiation, which is far superior to that of its parent ZnCr-LDH (18 mu mol h(-1).g(-1)). The present findings demonstrate that the self-assembly of CdSe-LDHs is quite effective in synthesizing novel LDHs-based visible-light photocatalyst with high performance in hydrogen evolution from water splitting. Copyright (C) 2015, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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