Engineering hydroxyls on a metal-organic framework as Adsorbers and high-activity Dehydrochlorination sites for selective gold recovery

被引：3
|
作者：
Zhang, Tianshu [1 ]
Hou, Zhiang [1 ]
An, Xiaoqiang [1 ]
Sun, Meng [1 ]
Lan, Huachun [1 ]
Liu, Huijuan [1 ]
Qu, Jiuhui [1 ]
机构：
[1] Tsinghua Univ, Ctr Water & Ecol, Sch Environm, State Key Joint Lab Environm Simulat & Pollut Cont, Beijing 100084, Peoples R China
来源：
RESOURCES CONSERVATION AND RECYCLING | 2023年 / 199卷
基金：
中国国家自然科学基金;
关键词：
Gold recovery; Metal-organic frameworks; Terminal hydroxyl groups; Multinuclear adsorption; Conversation; SEPARATION; MEMBRANE;
D O I：
10.1016/j.resconrec.2023.107286
中图分类号：
X [环境科学、安全科学];
学科分类号：
08 ; 0830 ;
摘要：
Design of stable materials for selective gold extraction from complex sources is of a great challenge due to the poor understanding of the fundamental conversion processes responsible for anionic gold. Herein, engineering terminal hydroxyls is reported to tune the interfacial adsorption of aqueous [AuCl4]- . The energetically favorable nucleation pathway endorses the conversion of [AuCl4]- to Au atoms on the adsorption sites by dehydrochlorination, forming polyhedral Au particles anchored on the Zr6OH-BTC. Compared to the atomically separated adsorption, this terminal hydroxyl-assisted approach achieved 5.7 times enhancement in the gold recovery capacity. This study paves a new way to comprehend the conversation and adsorption mechanism for alleviating the emerging dilemma of gold recovery.
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页数：9
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