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• W2529126521 abstract "Ni–Fe bimetallic nanoparticle assemblies with diameter of 20–200 nm were synthesised on surface of silica and applied for reductive degradation of the drug nimesulide in aqueous solution. The bimetallic nanoparticles was synthesised as a function of the Ni content: 8 wt.% Ni + 92 wt.% Fe, 18% wt.% Ni + 82 wt.% Fe, and 34 wt.% Ni + 66 wt.% Fe. SEM images confirmed that the nanoparticles were uniformly anchored on silica. EDS analysis confirmed the presence of Fe, Ni and silica in the samples, while XRD analysis showed presence of the Fe0 and Fe2O3/Fe3O4 structures. The reductive degradation of nimesulide with silica-supported bimetallic nanoparticles containing 8 wt.% Ni was carried out under batch conditions using an agitation frequency of 250 rpm. The formation of by-products was monitored using the LC-ESI–MS technique. A complete removal of nimesulide (50 mg L−1) was achieved after 15 min of reaction with silica-supported bimetallic nanoparticles containing 8 wt.% Ni (6.0 g L−1). The influence of the external and internal mass-transfer limitations were evaluated and a theoretical analysis of the reductive reaction was presented. It was verified that the degradation of nimesulide is characterised by reduction of the nitro group and removal of the sulphonyl group with formation of an amine and thioester aromatic derivative product. The present work indicates that the reductive treatment process making use of silica-supported bimetallic nanoparticles containing Fe and Ni is very promising for the elimination of the nitro moiety present in nimesulide." @default.
• W2529126521 created "2016-10-14" @default.
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• W2529126521 date "2016-12-01" @default.
• W2529126521 modified "2023-10-01" @default.
• W2529126521 title "Characterisation of silica-supported Fe–Ni bimetallic nanoparticles and kinetic study of reductive degradation of the drug nimesulide" @default.
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• W2529126521 doi "https://doi.org/10.1016/j.jece.2016.09.038" @default.
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