Seedless synthesis and efficient recyclable catalytic activity of Ag@Fe nanocomposites towards methyl orange

Abstract

This work demonstrates a competitive reduction method of synthesis of nanomaterials. In this method along cetyltrimethylammonium bromide (CTAB), the reduction of Ag + and Fe 3+ ions is achieved by ascorbic acid-to-bimetallic Ag@Fe yellowcolored nanomaterials. The shape of UV-visible spectra and wavelengths absorbed of Ag@Fe can be tuned from ca. 290-600 nm by controlling [CTAB] and [Ag + ]. The apparent first-order rate constants were calculated within the approximation of 6.1 × 10 −3 s −1 . The as-prepared Ag@Fe NPs have been found to be very important catalyst in terms of depredate methyl orange in vicinity of sodium borohydride (NaBH 4 ), which exhibits excellent efficiency and re-usability in the prototypical reaction. The cmc of cationic surfactant CTAB has been determined by conductivity method under different experimental conditions. In the presence of CTAB, Ag + and Fe 3+ ions reduce to Ag@Fe core/shell nanoparticles, comprehend a change in wavelength and intensity of SRP band. The apparent first-order rate constant, activation energy, and turnover frequency for the methyl orange reduction catalyzed by Ag@Fe NPs were found to be 1.6 × 10 −3 s −1 , 58.2 kJ mol −1 , and 1.1 × 10 −3 s −1 , respectively.

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Structural and optical properties of silver supported α-Fe2O3nanocomposite fabricated bySaraca asocaleaf extract for the effective photo-degradation of cationic dye Azure B

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