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- Title
Preparation of bifunctional electrocatalyst by recycling heavy metal ions from wastewater using EDTAD-functionalized MOF as highly efficient adsorbent.
- Authors
Qian, Yue; Fu, Pei-Xue; Yin, Rui-Ze; Yang, Han-Ni; Li, Si-Yang; Xiong, Wei-Wei; Zheng, Fen-Fen; Zhang, Jun-Hao; Yuan, Ai-Hua; Pang, Huan
- Abstract
The recovery and subsequent reuse of heavy metal ions from industrial wastewater are crucial for promoting sustainable development, but they also present significant challenges. In this article, ethylenediaminetetra-acetic dianhydride (EDTAD), which possesses strong metal chelating ability, is covalently attached to MIL-101-NH2 (Fe), resulting in a significant improvement in the removal rate of heavy metal ions in wastewater. Furthermore, the recovered waste metal ions are transformed into high-performance FeNi3/NiFe2O4@NC dual-functional oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalysts. Specifically, FeNi3/NiFe2O4@NC exhibits outstanding OER performance, with only a 264 mV overpotential at 10 mA·cm−2. Density functional theory (DFT) calculations reveal that the synergistic effect of the FeNi3/NiFe2O4@NC heterostructure can enhance conductivity, optimize the free energy of * to OH* during OER reaction, and promote catalytic reactivity. This work not only improves the removal rate of heavy metal ions but also obtains high-performance catalysts, while providing a new approach for the treatment and secondary utilization of heavy metal ion wastewater as well as the preparation of low-cost catalysts.
- Publication
Rare Metals, 2024, Vol 43, Issue 10, p5105
- ISSN
1001-0521
- Publication type
Article
- DOI
10.1007/s12598-024-02857-9