Ultrasound-assisted fabrication of metal nano-porous shells across polymer beads and their catalytic activity for reduction of 4-nitrophenol

Li, Wu, Allioux, Francois-Marie, Lee, Judy, Ashokkumar, Muthupandian and Dumée, Ludovic F. (2018) Ultrasound-assisted fabrication of metal nano-porous shells across polymer beads and their catalytic activity for reduction of 4-nitrophenol Ultrasonics Sonochemistry, 49. pp. 63-68.

Text Ultrasound-assisted fabrication of metal nano-porous shells across polymer beads and their catalytic activity for reduction of 4-nitrophenol.docx - Accepted version Manuscript Download (3MB)

Abstract

Metal nano-porous architectures are a novel class of nanomaterials which has been applied in the fields of catalysis, sensing and gas storage because of their high surface-to-volume ratio, high mechanical strength and long-range ordered architectures. A commonly-used synthetic strategies to achieve architectures with high precision and diverse porosity design is the seed-and-growth method. In this work, using a dual-frequency sequential sonication approach, we have demonstrated a sonochemical-assisted one-pot seeding with a successive shell growth synthetic strategy for mesoporous metal deposition via a gold (Au) nanoparticle and poly(styrene) beads system. A uniform coating of gold nanoparticle seeds with dense surface coverage was formed by first employing 300 kHz ultrasound irradiation while the nano-porous shell growth was then performed under 1 MHz ultrasonic frequency. The precise control over the process conditions and parameters allowed for the design of well-defined shell thicknesses and surface roughness and area. The catalytic property of the MNMs was evaluated for the degradation of 4-nitrophenol and a high catalytic activity was achieved for the most porous gold structures, suggesting synergistic effects between the architecture of the nanomaterials and their surface reactivity.

Item Type:	Article
Divisions :	Faculty of Engineering and Physical Sciences > Chemical and Process Engineering
Authors :	Name Email ORCID Li, Wu Allioux, Francois-Marie Lee, Judy j.y.lee@surrey.ac.uk Ashokkumar, Muthupandian Dumée, Ludovic F.
Date :	December 2018
DOI :	10.1016/j.ultsonch.2018.07.017
Copyright Disclaimer :	© 2018. This manuscript version is made available under the CC-BY-NC-ND 4.0 license http://creativecommons.org/licenses/by-nc-nd/4.0/
Uncontrolled Keywords :	Sonochemical reduction; Porous gold; Template deposition; Microstructure control; Catalytic degradation
Depositing User :	Clive Harris
Date Deposited :	10 Aug 2018 13:34
Last Modified :	18 Jul 2019 02:08
URI:	http://epubs.surrey.ac.uk/id/eprint/848890

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