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Synthesis of AgInS2-xAg2S-yZnS-zIn6S7 (x, y, z = 0, or 1) Nanocomposites with Composition-Dependent Activity towards Solar Hydrogen Evolution

1
College of Science, China University of Petroleum, Qingdao 266580, China
2
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum, Qingdao 266580, China
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Authors to whom correspondence should be addressed.
Academic Editor: Walter Remo Caseri
Materials 2016, 9(5), 329; https://doi.org/10.3390/ma9050329
Received: 25 March 2016 / Revised: 20 April 2016 / Accepted: 26 April 2016 / Published: 29 April 2016
(This article belongs to the Section Advanced Composites)
Metal sulfides-based nanomaterials have been used as a class of efficient solar driven photocatalysts. However, the H2-production rate observed over these photocatalysts remains problematic. Here, the AgInS2-xAg2S-yZnS-zIn6S7 (x, y, z = 0 or 1) nanocomposites with controlled compositions have been successfully prepared by a simple hydrothermal method with AgI polyhedrons as silver source. The obtained AgInS2-xAg2S-yZnS-zIn6S7 nanocomposites showed a composition-dependent activity for H2 evolution from aqueous solution under simulated sun-light irradiation. The results showed that the optimized product of AgInS2-Ag2S-ZnS nanoparticles synthesized with the precursor ratio of Ag:Zn = 1:1 exhibited the highest H2 evolution rate of 5.4 mmol·g−1·h−1. Furthermore, the catalyst can be used for 20 h without loss of activity, showing its high stability. It opens a new path to achieve highly efficient solar photocatalyst for H2 evolution from water splitting. View Full-Text
Keywords: heterojunction; AgInS2-xAg2S-yZnS-zIn6S7; photocatalysis; H2 evolution heterojunction; AgInS2-xAg2S-yZnS-zIn6S7; photocatalysis; H2 evolution
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Wang, Z.; Wang, S.; Liu, J.; Jiang, W.; Zhou, Y.; An, C.; Zhang, J. Synthesis of AgInS2-xAg2S-yZnS-zIn6S7 (x, y, z = 0, or 1) Nanocomposites with Composition-Dependent Activity towards Solar Hydrogen Evolution. Materials 2016, 9, 329.

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