Interfacial Coordination Bonding-Assisted Redox Mechanism-Driven Highly Selective Precious Metal Recovery on Covalent-Functionalized Ultrathin 1T-MoS<sub>2</sub>
Ranhao Wang, Siyuan Luo, Renji Zheng, Yangzi Shangguan, Xuezhen Feng, Qiang Zeng, Jiaxin Liang, Zhijie Chen, Jing Li, Dazhong Yang, Hong Chen
Abstract
Rational design of functional material interfaces with well-defined physico-chemical-driven forces is crucial for achieving highly efficient interfacial chemical reaction dynamics for resource recovery. Herein, via an interfacial structure engineering strategy, precious metal (PM) coordination-active pyridine groups have been successfully covalently integrated into ultrathin 1T-MoS 2 (Py-MoS 2 ). The constructed Py-MoS 2 shows highly selective interfacial coordination bonding-assisted redox (ICBAR) functionality toward PM recycling. Py-MoS 2 shows state-of-the-art high recovery selectivity toward Au 3+ and Pd 4+ within 13 metal cation mixture solutions. The related recycling capacity reaches up to 3343.00 and 2330.74 mg/g for Au 3+ and Pd 4+, respectively. More importantly, above 90% recovery efficiencies have been achieved in representative PMs containing electronic solid waste leachate, such as computer processing units (CPU) and spent catalysts. The ICBAR mechanism developed here paves the way for interface engineering of the well-documented functional materials toward highly efficient PM recovery.