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One-pot fabrication of AgNPs, AuNPs and Ag-Au nano-alloy using cellulosic solid support for catalytic reduction
Hossam E Emam1, Manal M El-Zawahry2, Hanan B Ahmed3
1Pretreatment and Finishing of Cellulosic Fibers Department, Textile Research Division, National Research Centre, Scopus affiliation ID 60014618, 33 EL Buhouth St., Dokki, Giza 12622, Egypt.
Abstract:
The current report provides a simple, green and inexpensive route for one-pot fabrication of AgNPs, AuNPs, and Ag-Au nano-alloy individually onto cellulosic solid support. Cellulosic solid support was naturally extracted from plant and then was used for deposition of nanoparticles. The manufacturing was carried out through redox reaction between metal ions and alcoholic groups of cellulose, resulting in production of metallic/bimetallic nanostructures. AuNPs was obtained in size of 26.1nm smaller than AgNPs (36.3nm). Controlling in size of bimetallic nanostructures was achieved by tuning the concentrations, mass ratios of nanometal precursors and their addition sequencing in reaction liquor. Immobilization of nanoparticles/bimetallic nanostructures was frequently speeded up the reduction reaction of p-nitro-aniline, however, bimetallic nanostructures exhibited much better catalytic reactivity, where, 87.2% from p-nitro-aniline was reduced to p-phenylene-di-amine only in 20min in the presence of Ag-Au bimetallic nano-alloy.
