Efficient gold recovery from waste electronic and electric equipment by amino-modified covalent triazine frameworks

被引：37
作者：
Kong, Hui -Yuan [1 ,2 ]
Tao, You [1 ,2 ]
Ding, Xuesong [1 ]
Han, Bao-Hang [1 ,2 ]
机构：
[1] Natl Ctr Nanosci & Technol, CAS Ctr Excellence Nanosci, CAS Key Lab Nanosyst & Hierarch Fabricat, Beijing 100190, Peoples R China
[2] Univ Chinese Acad Sci, Beijing 100049, Peoples R China
来源：
CHEMICAL ENGINEERING JOURNAL | 2023年 / 463卷
基金：
中国国家自然科学基金;
关键词：
Amino functionalization; Covalent triazine framework; Gold recovery; Waste electronic and electric equipment; AQUEOUS-SOLUTIONS; REDUCTION; AU(III); SEPARATION; POLYMERS; CAPTURE; METALS; CO2;
D O I：
10.1016/j.cej.2023.142393
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Recycling gold from e-waste is not only conducive to alleviating the pressure on resources and environment, but also has high economic value. Therefore, construction of adsorbents with high capacity and selectivity and low cost is significative for gold recovery from waste electronic and electric equipment (WEEE). Herein, aminofunctionalized covalent triazine frameworks (NH2-CTFs) were synthesized by ionothermal conditions. NH2CTF-1 and NH2-CTF-2 with high porosity and good thermal stability exhibit excellent gold recovery performance. Meanwhile, gold ions can be in situ reduced into gold nanoparticles by NH2-CTFs along with the adsorption process. Furthermore, NH2-CTF-1 and NH2-CTF-2 present good gold adsorption selectivity from WEEE. Notably, NH2-CTF-1 possesses high gold adsorption capacity (909 mg g-1) and outstanding recovery profit. These excellent performances confirm the potential of NH2-CTF-1 and NH2-CTF-2 for gold recovery from WEEE.
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页数：9
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