Synthesis and characterization of SiO2-Chitosan supported AgNPs and its catalytic application for reduction of malachite green

Indian Journal of Chemical Technology

Saravanakumar, A¹ 

关键词: Silica;    Chitosan;    AgNPs;    Malachite green;    Composite;    Silica-chitosan/AgNPs;   

DOI  :  

学科分类：化学（综合）

来源: National Institute of Science Communication and Information Resources

【 摘 要 】

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.

【 授权许可】

CC BY-NC-ND