文献类型：期刊文献

中文题名：氨基硫脲功能化PGMA及对金的吸附性能（英文）

英文题名：Superior Au-adsorption performance of aminothiourea-modified waste cellulosic biomass

作者：王福春 赵君梅 王万坤 刘会洲

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：25

期号：12

起止页码：2992-3003

中文期刊名：中南大学学报：英文版

外文期刊名：JOURNAL OF CENTRAL SOUTH UNIVERSITY

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

基金：Projects(51504073, 51404081, 51672275) supported by the National Natural Science Foundation of China; Project(2012CBA01202) supported by the National Key Technology Research and Development Program of the Ministry of Science and Technology, China; Project (QianJiaoKeHe KY[2015] 433) supported by the Research Program of the Education Department of Guizhou Province, China; Project(XJG20141104) supported by the Research Program of Talented Scholars of Guizhou Institute of Technology, China

语种：中文

中文关键词：吸附;还原-沉积;废弃纤维素基生物质;氨基硫脲;金纳米颗粒

外文关键词：adsorption;reduction-deposition;waste cellulosic biomass;aminothiourea;gold nanoparticles

摘要：纤维素基废弃生物质具有价格低廉和环境友好等优点,因而得到了广泛应用。本文提出了一种纤维素基废弃生物质功能化的通用制备方法,即先通过NaIO4选择性氧化将废弃生物质转化为含双醛基的平台中间体,然后利用醛基特定的Schiff base反应引入对金离子有优良配位能力的配基。以典型的废弃纤维素基生物质,如玉米秸秆(AT-S)、棉花(AT-C)和纸(AT-P)为原料制备了氨基硫脲修饰的吸附剂。AT-S、AT-C和AT-P在298 K下对Au(Ⅲ)的饱和吸附容量分别为21.4、19.0和3.28 mol/kg,Au(Ⅲ)吸附量与吸附剂中硫脲官能团的含量成正相关性。Au(Ⅲ)的吸附符合准二级动力学吸附模型和Langmuir等温吸附模型。AT-S对Au(Ⅲ)的吸附量是玉米秸秆的357倍,是目前文献中报道的有关Au(Ⅲ)吸附容量最高的吸附剂。AT-S对Au(Ⅲ)与其他金属如Cu(Ⅱ)、Ni(Ⅱ)、Co(Ⅱ)、Pt(Ⅵ)、Pd(Ⅱ)和Rh(Ⅲ)有着优良的分离选择性。采用XRD、TG、SEM、TEM和FTIR进行分析表征,结果表明吸附的AuCl+4~–被还原为Au0纳米颗粒并沉积在AT-S吸附剂表面。
Waste cellulosic biomass obtains various applications due to low-cost and eco-benign characteristics.A general strategy is proposed for waste cellulosic biomass to be modified with dialdehyde functional groups as intermediates through periodate partial oxidation.Finally,aminothiourea-modified waste cellulosic biomass can be prepared through Schiff reaction.Waste corn stalk,cotton and paper as typical precursors,were used to prepare cellulosic biomass,abbreviated as AT-S,AT-C and AT-P,respectively,and their adsorption behaviors of Au(III)from the hydrochloric acid medium were investigated.The pseudo-second kinetics equation as well as the Langmuir isotherm equation can be used to depict the adsorption process,and the maximum adsorption capacities of Au(III)are21.4,19.0and3.28mol/kg for AT-S,AT-C and AT-P at298K,respectively.The adsorption capacities of Au(III)on aminothiourea modified corn stalk(AT-S)is almost357times greater than that of raw corn stalk.To the best of our knowledge,AT-S has the highest adsorption capacity towards Au(III).AT-S also displays a superior separation selectivity towards Au(III)in the presence of Cu(II),Ni(II),Co(II),Pt(VI),Pd(II)and Rh(III).Furthermore,the characterization analysis of XRD,TG,SEM,TEM and FTIR confirms that AuCl4– has been reduced to elemental Au nanoparticles and deposit onto the surface of the biomass.It shows a prospect for waste corn stalk to be used to adsorb Au(III)from liquid phase and the possible fabrication of gold nanoparticles by a general adsorption process without any reductant.