dumee-ultrasoundassisted-2018.pdf (1.24 MB)
Ultrasound-assisted fabrication of metal nano-porous shells across polymer beads and their catalytic activity for reduction of 4-nitrophenol
journal contribution
posted on 2018-12-01, 00:00 authored by Wu Li, Francois-Marie Allioux, Judy Lee, Muthupandian Ashokkumar, Ludovic DumeeLudovic DumeeMetal 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.
History
Journal
Ultrasonics sonochemistryVolume
49Pagination
63 - 68Publisher
ElsevierLocation
Amsterdam, The NetherlandsPublisher DOI
Link to full text
ISSN
1350-4177eISSN
1873-2828Language
engPublication classification
C1 Refereed article in a scholarly journalCopyright notice
2018, Elsevier B.V.Usage metrics
Keywords
Catalytic degradationMicrostructure controlPorous goldSonochemical reductionTemplate depositionScience & TechnologyTechnologyPhysical SciencesAcousticsChemistry, MultidisciplinaryChemistrySONOCHEMICAL SYNTHESISGOLD NANOPARTICLESBIMETALLIC NANOPARTICLESPLATINUM NANOPARTICLESAG NANOPARTICLESAQUEOUS-SOLUTIONAUSIZEPARTICLESPALLADIUMMechanical Engineering
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