文献类型：期刊文献

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

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

第一作者：王福春

通信作者：Zhao, JM[1]

机构：[1]Guizhou Inst Technol, Sch Mat & Met Engn, Guiyang 550003, Guizhou, Peoples R China;[2]Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China

第一机构：贵州理工学院材料与冶金工程学院

通信机构：corresponding author), Chinese Acad Sci, Inst Proc Engn, Beijing 100190, Peoples R China.

年份：2018

卷号：37

期号：3

起止页码：196-203

外文期刊名：RARE METALS

收录：;EI(收录号：20180104598066);Scopus(收录号：2-s2.0-85039545294);WOS:【SCI-EXPANDED(收录号:WOS:000427692800004)】；

语种：英文

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-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 center dot 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), thermogravimetry-differential 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.