文献类型：期刊文献

中文题名：Adsorption of Au(Ⅲ) by amino-modified monodispersed PGMA microspheres and deposition of gold nanoparticles

英文题名：Adsorption of Au(Ⅲ) by amino-modified monodispersed PGMA microspheres and deposition of gold nanoparticles

作者：Fu-Chun Wang Jun-Mei Zhao Wan-Kun Wang Zi-Zheng Tong

第一作者：Fu-Chun Wang

机构：[1]School of Materials and Metallurgical Engineering,Guizhou Institute of Technology;[2]Institute of Process Engineering,Chinese Academy of Sciences

第一机构：贵州理工学院材料与冶金工程学院

年份：2018

卷号：37

期号：3

起止页码：196-203

中文期刊名：稀有金属：英文版

收录：CSTPCD;;Scopus;CSCD:【CSCD2017_2018】；

基金：financially supported by the National Natural Science Foundation of China(Nos.51504073 and 51404081);the Joint Research Program of the Science and Technology Department of Guizhou Province(No.QianKeHe LH [2014] 7373);the Research Program of the Education Department of Guizhou Province (No.QianJiaoKeHe KY [2015]433);the Research Program of Talented Scholars of Guizhou Institute of Technology (No.XJG20141104)

语种：英文

中文关键词：吸附过程;PGMA;Au;黄金;氨基;扫描电子显微镜;Fourier;修改

外文关键词：PGMA microspheres AuCl4^- Amino groups Adsorption Reduction-deposition Elemental gold

摘要：Monodispersed poly(glycidyl methacrylate)(PGMA) microspheres with various amounts of amino groups(PGMA-NH_2) were used to adsorb Au(Ⅲ) from simulated wastewaters. Gold nanoparticle-coated PGMA functional microspheres can be directly obtained via the adsorption process. The adsorption kinetics follows pseudo-second model, and 10 min is enough for reaching at equilibrium. The adsorption isotherm follows Langmuir model, and the adsorption amounts for Au(Ⅲ) are 8.25 and 21.75 mol·kg^(-1) at 298 and 328 K, respectively. The relative separation coefficients between Au(Ⅲ), Pt(Ⅵ), Pd(Ⅱ)and Co(Ⅱ), Cu(Ⅱ); Ni(Ⅱ), Fe(Ⅲ) are all higher than 100 when 1 < pH < 3. Furthermore, the characterization analysis of X-ray diffraction(XRD), thermogravimetrydifferential scanning calorimetry(TG-DSC), scanning electron microscopy-energy dispersive spectroscopy(SEM-EDS), transmission electron microscopy(TEM) and Fourier transform infrared spectroscopy(FTIR) confirms that AuCl_4^-has been reduced to Au^0 nanoparticles and deposited onto the surface of PGMA-NH_2. The current work shows a good prospect for PGMA-NH_2 to be a valid adsorbent for the recovery of gold and the possible fabrication of gold nanoparticles by reduction-deposition process without any reductant.
Monodispersed poly（glycidyl methacrylate）（PGMA） microspheres with various amounts of amino groups（PGMA-NH2） were used to adsorb Au（Ⅲ） from simulated wastewaters. Gold nanoparticle-coated PGMA functional microspheres can be directly obtained via the adsorption process. The adsorption kinetics follows pseudo-second model, and 10 min is enough for reaching at equilibrium. The adsorption isotherm follows Langmuir model, and the adsorption amounts for Au（Ⅲ） are 8.25 and 21.75 mol·kg^-1 at 298 and 328 K, respectively. The relative separation coefficients between Au（Ⅲ）, Pt（Ⅵ）, Pd（Ⅱ）and Co（Ⅱ）, Cu（Ⅱ）; Ni（Ⅱ）, Fe（Ⅲ） are all higher than 100 when 1 〈 pH 〈 3. Furthermore, the characterization analysis of X-ray diffraction（XRD）, thermogravimetrydifferential scanning calorimetry（TG-DSC）, scanning electron microscopy-energy dispersive spectroscopy（SEM-EDS）, transmission electron microscopy（TEM） and Fourier transform infrared spectroscopy（FTIR） confirms that AuCl4^-has been reduced to Au^0 nanoparticles and deposited onto the surface of PGMA-NH2. The current work shows a good prospect for PGMA-NH2 to be a valid adsorbent for the recovery of gold and the possible fabrication of gold nanoparticles by reduction-deposition process without any reductant.