Journal
APPLIED CATALYSIS B-ENVIRONMENTAL
Volume 202, Issue -, Pages 184-190Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apcatb.2016.09.022
Keywords
Photocatalysis; g-C3N4 nanosheets; Ca2Nb2TaO10 nanosheets; Composites; H-2 production
Funding
- Australian Research Council
- Royal Thai Government Scholarship, Ministry of Science and Technology
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Scalable g-C3N4 nanosheet powder catalyst was prepared by pyrolysis of dicyandiamide and ammonium chloride followed by ultra-sonication and freeze-drying. Nanosheet composite that combines the g-C3N4 nanosheets and Ca2Nb2TaO10 nanosheets with various ratios were developed and applied as photocatalysts for solar hydrogen generation. Systematic studies reveal that the g-C3N4/Ca2Nb2TaO10 nanosheet composite with a mass ratio of 80:20 shows the best performance in photocatalytic H-2 evolution under visible light-irradiation, which is more than 2.8 times out-performing bare g-C3N4 bulk. The resulting nanosheets possess a high surface area of 96 m(2)/g, which provides abundance active sites for the photocatalytic activity. More importantly, the g-C3N4/Ca2Nb2TaO10 nanosheet composite shows efficient charge transfer kinetics at its interface, as evident by the photoluminescence measurement. The intimate interfacial connections and the synergistic effect between g-C3N4 nanosheets and Ca2Nb2TaO10 nanosheets with cascading electrons are efficient in suppressing charge recombination and improving photocatalytic H-2 evolution performance. (C) 2016 Elsevier B.V. All rights reserved.
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