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Silver nanoparticles prepared by gamma irradiation across metal-organic framework templates

journal contribution
posted on 2015-01-01, 00:00 authored by Li He, Ludovic DumeeLudovic Dumee, Dan LiuDan Liu, L Velleman, Fenghua SheFenghua She, C Banos, J B Davies, Lingxue KongLingxue Kong
In this study, we demonstrate for the first time the successful fabrication of well-dispersed ultrafine silver nanoparticles inside metal-organic frameworks through a single step gamma irradiation at room temperature. HKUST-1 crystals are soaked in silver nitrate aqueous solution and irradiated with a Cobalt 60 source across a range of irradiation doses to synthesize highly uniformly distributed silver nano-particles. The average size of the silver nanoparticles across the Ag@HKUST-1 materials is found to vary between 1.4 and 3 nm for dose exposures between 1 and 200 kGy, respectively. The Ag@HKUST-1 hybrid crystals exhibit strong surface plasmon resonance and are highly durable and efficient catalytic materials for the reduction of 4-nitrophenol to 4-aminophenol (up to 14.46 × 10-3 s-1 for 1 kGy Ag@HKUST-1). The crystals can be easily recycled for at least five successive cycles of reaction with a conversion efficiency higher than 99.9%. The gamma irradiation is demonstrated to be an effective and environmental friendly process for the synthesis of nano-particles across confined metal-organic frameworks at room temperature with potential applications in environmental science.

History

Journal

RSC Advances

Volume

5

Issue

14

Pagination

10707 - 10715

Publisher

Royal Society of Chemistry

Location

Cambridge, Eng.

eISSN

2046-2069

Language

eng

Publication classification

C Journal article; C1 Refereed article in a scholarly journal

Copyright notice

2015, Royal Society of Chemistry

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