Title: Biogenic synthesis of metal nanocatalysts using Mimosa pudica leaves for efficient reduction of aromatic nitrocompounds
Abstract: Phytochemicals present in Mimosa pudica (M.pudica) leaves extract exhibit the potential for biogenic reduction of Ni, Co and Cu ions to their respective base metal nanoparticles (NPs) in a single-step. This approach of NP synthesis mediated by plant extract is environmentally benign and totally an aqueous phase green synthetic approach. The so-synthesised metallic NPs have identical spherical shape with an average diameter of about 8 nm as determined from TEM images. The ensuing particles have been utilized as nanocatalysts for the reduction of aromatic nitro compounds, p-nitrophenol and p-nitroaniline, using sodium borohydride (NaBH4). Both reactions are extremely slow in the absence of a catalyst. From the kinetic data, the rate constants for both the catalyzed reactions exhibit an interesting order: kCu NPs > kCo NPs > kNi NPs. These variations in catalytic performance of the NPs have been attributed to the difference in their work function values.
Publication Year: 2014
Publication Date: 2014-08-22
Language: en
Type: article
Indexed In: ['crossref']
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Cited By Count: 24
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