Journal
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
Volume 41, Issue 5, Pages 3446-3455Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.ijhydene.2015.12.190
Keywords
Photocatalyst; Hydrogen production; Titanium dioxide; Ag nanoparticle; Ethanol splitting; Hierarchical structure
Categories
Funding
- National Natural Science Foundation of China [21328301]
- Guangdong Provincial Science and Technology Project [2014A030312007, 2015A050502012]
- Fundamental Research Funds for the Central Universities [2015ZP021]
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The hierarchical Ag NPs with a bimodal size distribution were auto-decorated on the surface of rice-like N-TiO2 (named h-Ag/N-TiO2) by semiconductor-metal double excitation process under solar light irradiation. The photoinduced growth process of self-assembled h-Ag/N-TiO2 and its photocatalytic mechanism of photo-splitting ethanol into hydrogen have been discussed in detail. The synthesized h-Ag/N-TiO2 as a plasmonic photocatalyst for photo-splitting ethanol exhibited a higher hydrogen production rate (4.7 mmol h(-1) g(-1)) than Ag NPs universally loaded N-TiO2 (3.4 mmol h(-1) g(-1)) and pure N-TiO2 (2.1 mmol h(-1) g(-1)). This work presents a reversed photo-induced synthesis strategy to design a stable Ag-TiO2 plasmonic photocatalyst with high photocatalytic efficiency under solar light. A better understanding of this solar light induced self-assembled process for Ag-TiO2 is crucial in developing metal-semiconductor system for solar energy materials. Copyright (C) 2016, Hydrogen Energy Publications, LLC. Published by Elsevier Ltd. All rights reserved.
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