Green synthesis and catalytic application of curcumin stabilized silver nanoparticles

Journal of Chemical Sciences

N JAIN¹  S K SINGHA²  A D VERMA¹  M A QURAISHI¹  I SINHA1¹ 

[1] Department of Chemistry, Indian Institute of Technology (Banaras Hindu University), Varanasi, Uttar Pradesh 221 005, India$$;Indian School of Mines, Dhanbad, India$$

关键词: Green synthesis;    curcumin stabilized silver nanoparticles;    p-nitrophenol;    catalytic kinetics;    Langmuir-Hinshelwood model.;   

DOI  :  

来源: Indian Academy of Sciences

【 摘 要 】

An ultrasonication based green synthesis approach was used to prepare curcumin-stabilized silver nanoparticles (c-AgNPs). Nanoparticles thus obtained were characterized by UV-Visible spectroscopy, X-ray diffraction (XRD), Transmission electron microscopy (TEM) and Fourier transform infrared spectroscopy (FTIR). Two different size distributions of c-AgNPs were obtained by changing the ratio of curcumin to silver salt precursor. These c-AgNPs were used as catalysts in the catalytic reduction of p-nitrophenol to p-aminophenol. The c-AgNPs with narrower size distribution exhibited better catalytic activity as well as lower activation energy. Variation of apparent rate constant with the reactant concentration agreed with the Langmuir- Hinshelwood (LH) model. Consequently, the surface rate constant related to the rate-determining step and the respective adsorption constants of p-nitrophenol and of borohydride were determined as per this model.

【 授权许可】

Unknown