Journal
RENEWABLE ENERGY
Volume 113, Issue -, Pages 1503-1514Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.renene.2017.06.042
Keywords
ZnIn2S4; Synergistic effect; La; Graphene; Visible-light; Hydrogen evolution
Funding
- Fund for the Research and Development of Science and Technology in Shenzhen [JCYJ20150403161923536, ZDSYS201603301417588]
- Special Fund for the Development of Strategic and New Industry in Shenzhen [JCYJ20150731104949789, JSKF20150827160706290]
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A series of RGO/La-ZnIn2S4 photocatalysts were successfully synthesized using the hydrothermal method with different amount of RGO (0 wt%, 0.1 wt%, 0.5 wa, 1.0 wt%, 2.0 wt%, 5.0 wt%) and La (0 wt%, 0.1 wt%, 0.5 wt%, 1.0 wt%, 2.0 wt%, 5.0 wt%) and characterized by various analysis techniques, such as XRD, Raman, SEM, UV-Vis, TEM, BET and PL. The photocatalytic H-2 evolution activities have also been evaluated under visible-light irradiation. The H-2 production activity of RGO/La-ZnIn2S4 was influenced by both La and RGO significantly. The activity reached the best when the amounts of La and RGO were both 1.0 wt%. The hydrogen production rate of 1.0Pt/1.0RGO/1.0La-ZnIn2S4 was 2255 smol g(-1) h(-1) and the apparent quantum yield and the energy conversion efficiency were 29.45% and 18.79% at 420 nm respectively. The activity was related to the BET surface area, the pore microstructure and the synergistic effect of RGO and La. On the basis of the characterization of the catalysts, the synergistic effect of RGO and La on the photocatalytic activity of RGO/La-ZnIn2S4 was discussed in detail. (C) 2017 Published by Elsevier Ltd.
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