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Synthesis of mesoporous silica-supported Ag nanorod-based bimetallic catalysts and investigation of their plasmonic activity under visible light irradiation

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Abstract

A series of bimetallic M/Ag (where M represents Pd, Ru, Ni and Co metallic species) nanorod (NR)-based plasmonic photocatalysts with 0.5 wt% loading of M on Ag (1.0 wt%) are prepared within the mesoporous channels of SBA-15. The chemical structure, morphology and optical properties of M/Ag/SBA-15 are well characterized by UV-vis spectroscopy, TEM, FT-EXAFS, XPS and N2 adsorption–desorption measurement studies. Subsequently, the photocatalytic activity is assessed by hydrogen production from ammonia borane (AB) and chemical reduction of 4-nitrophenol (NP) to 4-aminophenol (AP) under visible light irradiation. The enhanced catalytic activities under light irradiation in comparison with dark conditions are explained by a plausible photocatalytic and charge separation mechanism to envisage the tentative reaction pathway. Finally, the reusability of the catalyst is evaluated via four consecutive catalytic runs.

Graphical abstract: Synthesis of mesoporous silica-supported Ag nanorod-based bimetallic catalysts and investigation of their plasmonic activity under visible light irradiation

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Publication details

The article was received on 20 Feb 2017, accepted on 02 May 2017 and first published on 03 May 2017


Article type: Paper
DOI: 10.1039/C7CY00321H
Citation: Catal. Sci. Technol., 2017, Advance Article
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    Synthesis of mesoporous silica-supported Ag nanorod-based bimetallic catalysts and investigation of their plasmonic activity under visible light irradiation

    P. Verma, Y. Kuwahara, K. Mori and H. Yamashita, Catal. Sci. Technol., 2017, Advance Article , DOI: 10.1039/C7CY00321H

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