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Title: Synthesis and characterization of SiO2-Chitosan supported AgNPs and its catalytic application for reduction of malachite green
Authors: Saravanakumar, A
Dharmendirakumar, M
Keywords: Silica;Chitosan;AgNPs;Malachite green;Composite;Silica-chitosan/AgNPs
Issue Date: Nov-2018
Publisher: NISCAIR-CSIR, India
Abstract: Designing novel nanocatalysts for the reduction of water borne dyes is a topic of recent research interest. A new composite, SiO2-chitosan supported AgNPs (3-11%), has been synthesized and characterized through FT-IR, XRD, BET and SEM. The catalytic activity of the composites has been investigated through reduction of malachite green as a model reaction in the presence of NaBH4. The reduction is rapid and followed pseudo first order kinetics. Increase of pH increased the rate of reduction compared to low pH, as at a low pH, NaBH4 decomposed directly and rapidly. An increase in NaBH4 content also increased the rate. The results indicate that the reduction can also be extended to other water borne reducible contaminants.
Page(s): 546-552
ISSN: 0975-0991 (Online); 0971-457X (Print)
Appears in Collections:IJCT Vol.25(6) [November 2018]

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