title: Controllable biosynthesis of gold nanoparticles from a Eucommia ulmoides bark aqueous extract.
abstract: The present work reports the green synthesis of gold nanoparticles (AuNPs) by water extract of Eucommia ulmoides (E. ulmoides) bark. The effects of various parameters such as the concentration of reactants, pH of the reaction mixture, temperature and the time of incubation were explored to the controlled formation of gold nanoparticles. The characterization through high resolution-transmission electron microscopic (HRTEM), energy dispersive X-ray spectroscopy (EDX) and X-ray diffraction (XRD) infer that the as-synthesized AuNPs were spherical in shape with a face cubic crystal (FCC) structure. The results from zeta potential and dynamic light scattering (DLS) suggest the good stability and narrow size distribution of the AuNPs. This method for synthesis of AuNPs is simple, economic, nontoxic and efficient. The as-synthesized AuNPs show excellent catalytic activity for the catalytic reducing decoloration of model compounds of azo-dye: reactive yellow 179 and Congo red.
authors.affiliation: Recyclable Resources Institute, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China.
authors.forename: Mingxia
authors.initials: M
authors.lastname: Guo
authors.affiliation: Recyclable Resources Institute, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China.
authors.forename: Wei
authors.initials: W
authors.lastname: Li
authors.affiliation: Recyclable Resources Institute, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China.
authors.forename: Feng
authors.initials: F
authors.lastname: Yang
authors.affiliation: Recyclable Resources Institute, College of Chemistry and Chemical Engineering, Wuhan Textile University, Wuhan 430073, China; Hubei Key Laboratory of Low Dimensional Optoelectronic Material and Devices, Hubei University of Arts and Sciences, Xiangyang, Hubei 440053, China. Electronic address: huihongliu@126.com.
authors.forename: Huihong
authors.initials: H
authors.lastname: Liu
mesh_terms: D031283:Eucommiaceae / Q000737:chemistry*; D006046:Gold / Q000737:chemistry*; D055772:Green Chemistry Technology; D053768:Metal Nanoparticles / Q000737:chemistry* / Q000648:ultrastructure; D010936:Plant Extracts / Q000737:chemistry*; D014867:Water / Q000737:chemistry
chemical_list: D010936:Plant Extracts; D014867:Water; D006046:Gold
keywords: Aqueous extract; Biosynthesis; Eucommia ulmoides bark; Gold nanoparticles