磷酸化石墨烯(PGO)的制备及其对Gd^(3+)的吸附性能研究  

Preparation of phosphated graphene oxide and its adsorption properties for Gd^(3+)

作　　者：杨启毅 任嗣利 徐海燕[1,2] 贾卫红 刘洪霞 王金清 YANG Qiyi;REN Sili;XU Haiyan;JIA Weihong;LIU Hongxia;WANG Jinqing(State Key I.aboratory of Solid Imbrication,Lanzhou Institute of Chemical Physics,CAS,Lanzhou 730000,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Resources and Environmental Engineering,Jiangxi University of Science and Technology,Ganzhou 341000,China)

机构地区：[1]中国科学院兰州化学物理研究所固体润滑国家重点实验室,兰州730000 [2]中国科学院大学,北京100049 [3]江西理工大学资源与环境工程学院,江西赣州341000

出　　处：《功能材料》2018年第7期7175-7182,共8页Journal of Functional Materials

基　　金：国家自然科学基金资助项目(51574217;51675514)

摘　　要：以氧化石墨烯(GO)为原料,利用膦类基团对稀土离子的高配位能力制备了磷酸化石墨烯(PGO)。分别利用XRD、FT-IR和XPS对PGO的物相、组成和化学性质进行了分析表征,并且利用TEM、SEM和BET等观察分析了PGO的形貌尺寸和微结构特征。在此基础上,研究了PGO对溶液中Gd^(3+)的吸附性能,并通过与GO进行对比,揭示了影响PGO吸附溶液中Gd^(3+)的关键因素。结果表明,PGO是一种表面磷酸化的二维炭材料,其对Gd^(3+)的吸附主要是基团配位控制的化学吸附过程。在温度为20℃、溶液pH值为4条件下,PGO在经过120min的吸附反应后可达到最高吸附容量。此时,与GO对Gd^(3+)的吸附量238.51mg/g相比,PGO的吸附量高达351.85mg/g,性能提升了47.52%。In this work,the phosphated graphene oxide（PGO）was successfully prepared using the precursor graphene oxide（GO）on the basis of the high-coordination capability of phosphines-groups with rare earth ions.The chemical properties of PGO were characterized by XRD,FT-IR and XPS,while its morphology and microstructure were investigated by TEM,SEM and BET,respectively.In addition,the adsorption properties of PGO in Gd3＋ solution were measured.Comparing with GO,the adsorption properties of PGO and the key factors on Gd3＋solution were studied.The results showed that PGO is a two-dimensional and surface-phosphated carbon material,and the chemical absorption controlled by group-coordination was the main adsorption mechanism.The optimal adsorption capability could be achieved under the conditions of 120 min,20 ℃ and the solution with the pH value of 4.The optimal adsorption capability of PGO was 351.85 mg/g,which was improved by 47.52% compared with the value of 238.51 mg/g for GO.

关 键 词：磷酸化 石墨烯 吸附 钆离子 

分 类 号：TQ424[化学工程] X52[环境科学与工程—环境工程]