title: Green synthesis of silver nanoparticles using Terminalia cuneata and its catalytic action in reduction of direct yellow-12 dye.
abstract: Facile green synthesis of silver nanoparticles (AgNPs) using aqueous bark extract of Terminalia cuneata has been reported in this article. The effects of concentration of the extract, reaction time and pH were studied by UV-Vis spectroscopy. Appearance of yellow color with λmax around ~420 nm suggested the formation of AgNPs. The stable AgNPs were further characterized by Fourier transform infrared (FT-IR) spectroscopy, X-ray diffraction (XRD), dynamic light scattering (DLS) with zeta potential and high resolution transmission electron microscopy (HR-TEM) with energy dispersive X-ray spectroscopy (EDS) analysis. The synthesized AgNPs were in the size range of 25-50 nm with a distorted spherical shape identified from HR-TEM analysis. The catalytic activity of AgNPs on the reduction of direct yellow-12 using NaBH4 was analyzed using a UV-Vis spectrophotometer. This study showed the efficacy of biogenic AgNPs in catalyzing the reduction of direct yellow-12.
authors.affiliation: School of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea; Department of Chemistry, Gandhigram Rural Institute - Deemed University, Gandhigram 624 302, Tamil Nadu, India.
authors.forename: Thomas Nesakumar Jebakumar Immanuel
authors.initials: TN
authors.lastname: Edison
authors.affiliation: School of Chemical Engineering, Yeungnam University, Gyeongsan 712-749, Republic of Korea. Electronic address: yrlee@yu.ac.kr.
authors.forename: Yong Rok
authors.initials: YR
authors.lastname: Lee
authors.affiliation: Department of Chemistry, Gandhigram Rural Institute - Deemed University, Gandhigram 624 302, Tamil Nadu, India. Electronic address: mgsethu@gmail.com.
authors.forename: Mathur Gopalakrishnan
authors.initials: MG
authors.lastname: Sethuraman
mesh_terms: D001391:Azo Compounds / Q000737:chemistry*; D001557:Benzenesulfonates / Q000737:chemistry*; D002384:Catalysis; D055772:Green Chemistry Technology / Q000379:methods*; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D036103:Nanotechnology / Q000379:methods; D010084:Oxidation-Reduction; D024301:Plant Bark / Q000737:chemistry; D010936:Plant Extracts / Q000737:chemistry*; D012834:Silver / Q000737:chemistry*; D029766:Terminalia / Q000737:chemistry*
chemical_list: D001391:Azo Compounds; D001557:Benzenesulfonates; D010936:Plant Extracts; C481453:direct yellow-12; D012834:Silver
keywords: Catalyst; Direct yellow-12; Green synthesis; Silver nanoparticles; Terminalia cuneata bark