Preparation of bifunctional electrocatalyst by recycling heavy metal ions from wastewater using EDTAD-functionalized MOF as highly efficient adsorbent

IF 9.6 1区材料科学 Q1 MATERIALS SCIENCE, MULTIDISCIPLINARY Rare Metals Pub Date : 2024-06-18 DOI:10.1007/s12598-024-02857-9

Yue Qian, Pei-Xue Fu, Rui-Ze Yin, Han-Ni Yang, Si-Yang Li, Wei-Wei Xiong, Fen-Fen Zheng, Jun-Hao Zhang, Ai-Hua Yuan, Huan Pang

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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.

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利用 EDTAD 功能化 MOF 作为高效吸附剂，通过回收废水中的重金属离子制备双功能电催化剂

回收和再利用工业废水中的重金属离子对于促进可持续发展至关重要，但同时也面临着巨大的挑战。本文将具有强金属螯合能力的乙二胺四乙酸二酐（EDTAD）共价连接到 MIL-101-NH2（Fe）上，从而显著提高了废水中重金属离子的去除率。此外，回收的废金属离子被转化为高性能的 FeNi3/NiFe2O4@NC 双功能氧进化反应（OER）和氧还原反应（ORR）催化剂。具体来说，FeNi3/NiFe2O4@NC 具有出色的 OER 性能，在 10 mA-cm-2 条件下仅有 264 mV 的过电位。密度泛函理论（DFT）计算显示，FeNi3/NiFe2O4@NC 异质结构的协同效应可以增强导电性，优化 OER 反应过程中 * 到 OH* 的自由能，并提高催化反应活性。这项工作不仅提高了重金属离子的去除率，还获得了高性能催化剂，同时为重金属离子废水的处理和二次利用以及低成本催化剂的制备提供了新的思路。

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来源期刊

Rare Metals 工程技术-材料科学：综合

CiteScore

12.10

自引率

12.50%

发文量

2919

审稿时长

2.7 months

期刊介绍： Rare Metals is a monthly peer-reviewed journal published by the Nonferrous Metals Society of China. It serves as a platform for engineers and scientists to communicate and disseminate original research articles in the field of rare metals. The journal focuses on a wide range of topics including metallurgy, processing, and determination of rare metals. Additionally, it showcases the application of rare metals in advanced materials such as superconductors, semiconductors, composites, and ceramics.