Thermally Reduced Graphene Oxide Membranes Revealed Selective Adsorption of Gold Ions from Mixed Ionic Solutions.
Thermally Reduced Graphene Oxide Membranes Revealed Selective Adsorption of Gold Ions from Mixed Ionic Solutions.
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DOI：
10.3390/ijms241512239
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发表时间：
2023-07-31
影响因子：
5.6
通讯作者：
Lei X
中科院分区：
文献类型：
--
作者：
Qiang Y;Gao S;Zhang Y;Wang S;Chen L;Mu L;Fang H;Jiang J;Lei X
从水中回收金是一个重要的研究领域。最近的报道强调了使用还原氧化石墨烯（rGO）从电子废物中选择性提取金的能力和选择性。这里，我们用热rGO膜进行了进一步的尝试，发现热rGO膜也具有类似的高吸附效率（在1000 ppm下每克rGO膜1.79 g金）。此外，我们特别注意的是Au 3+和其他离子之间的rGO膜的详细选择性。在Au ~（3+）/Cu ~（2+）和Au ~（3+）/Fe ~（3+）等比例的混合溶液中，对Au ~（3+）的最大吸附量约为Cu ~（2+）的16倍，约为Fe ~（3+）的10倍。在含有印刷电路板（PCB）的Au 3+：Cu 2+：Na+：Fe 3+：Mg 2+的混合离子溶液中，rGO膜中Au 3+：Cu 2+：Na+：Fe 3+：Mg 2+的质量比初始质量比高4个数量级。理论分析表明，这种选择性可能归因于金属离子和rGO膜之间的吸附能的差异。研究结果为rGO膜作为吸附剂从工业领域的二次金属资源中捕获Au提供了理论依据。
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.
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影响因子：
16.6
作者：
通讯作者：
--
影响因子：
3.7
作者：
Kresse, G;Furthmuller, J
通讯作者：
Furthmuller, J
DOI：
10.1073/pnas.2000606117
发表时间：
2020-07-14
影响因子：
11.1
作者：
Hong, Yeongran;Thirion, Damien;Yavuz, Cafer T.
通讯作者：
Yavuz, Cafer T.
影响因子：
4.8
作者：
Nakbanpote, W;Thiravetyan, P;Kalambaheti, C
通讯作者：
Kalambaheti, C
影响因子：
16.6
作者：
Wu, Huang;Wang, Yu;Tang, Chun;Jones, Leighton O.;Song, Bo;Chen, Xiao-Yang;Zhang, Long;Wu, Yong;Stern, Charlotte L.;Schatz, George C.;Liu, Wenqi;Stoddart, J. Fraser
通讯作者：
Stoddart, J. Fraser