文献类型：期刊文献

英文题名：Thermally Reduced Graphene Oxide Membranes Revealed Selective Adsorption of Gold Ions from Mixed Ionic Solutions

作者：Qiang, Yu[1,2];Gao, Siyan[1,2];Zhang, Yueyu[3,4];Wang, Shuai[1,2];Chen, Liang[5];Mu, Liuhua[3,4];Fang, Haiping[1,2];Jiang, Jie[5];Lei, Xiaoling[1,2]

机构：[1]East China Univ Sci & Technol, Sch Phys, Shanghai 200237, Peoples R China;[2]East China Univ Sci & Technol, Sch Mat Sci & Engn, Shanghai 200237, Peoples R China;[3]Univ Chinese Acad Sci, Wenzhou Inst, Wenzhou 325001, Peoples R China;[4]Univ Chinese Acad Sci, Beijing 100049, Peoples R China;[5]Ningbo Univ, Sch Phys Sci & Technol, Ningbo 315211, Peoples R China

年份：2023

卷号：24

期号：15

外文期刊名：INTERNATIONAL JOURNAL OF MOLECULAR SCIENCES

收录：;WOS:【SCI-EXPANDED(收录号:WOS:001046324600001)】；

基金：This work was supported by the National Natural Science Foundation of China (Grant Nos. 11974366), the Fundamental Research Funds for the Central Universities, China, the Natural Science Foundation of Shanghai, China (Grant No. ZR1463200) and Shanghai Supercomputer Center of China.

语种：英文

外文关键词：rGO membranes; adsorption; selectivity; gold recycling; adsorptive-reduction; two-dimensional materials

摘要：The recovery of gold from water is an important research area. Recent reports have highlighted the ultrahigh capacity and selective extraction of gold from electronic waste using reduced graphene oxide (rGO). Here, we made a further attempt with the thermal rGO membranes and found that the thermal rGO membranes also had a similarly high adsorption efficiency (1.79 g gold per gram of rGO membranes at 1000 ppm). Furthermore, we paid special attention to the detailed selectivity between Au3+ and other ions by rGO membranes. The maximum adsorption capacity for Au3+ ions was about 16 times that of Cu2+ ions and 10 times that of Fe3+ ions in a mixture solution with equal proportions of Au3+/Cu2+ and Au3+/Fe3+. In a mixed-ion solution containing Au3+:Cu2+:Na+:Fe3+:Mg2+ of printed circuit board (PCB), the mass of Au3+:Cu2+:Na+:Fe3+:Mg2+ in rGO membranes is four orders of magnitude higher than the initial mass ratio. A theoretical analysis indicates that this selectivity may be attributed to the difference in the adsorption energy between the metal ions and the rGO membrane. The results are conducive to the usage of rGO membranes as adsorbents for Au capture from secondary metal resources in the industrial sector.