{"title":"Preparation of bifunctional electrocatalyst by recycling heavy metal ions from wastewater using EDTAD-functionalized MOF as highly efficient adsorbent","authors":"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","doi":"10.1007/s12598-024-02857-9","DOIUrl":null,"url":null,"abstract":"<p>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-NH<sub>2</sub> (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 FeNi<sub>3</sub>/NiFe<sub>2</sub>O<sub>4</sub>@NC dual-functional oxygen evolution reaction (OER) and oxygen reduction reaction (ORR) catalysts. Specifically, FeNi<sub>3</sub>/NiFe<sub>2</sub>O<sub>4</sub>@NC exhibits outstanding OER performance, with only a 264 mV overpotential at 10 mA·cm<sup>−2</sup>. Density functional theory (DFT) calculations reveal that the synergistic effect of the FeNi<sub>3</sub>/NiFe<sub>2</sub>O<sub>4</sub>@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.</p><h3 data-test=\"abstract-sub-heading\">Graphical Abstract</h3>\n","PeriodicalId":749,"journal":{"name":"Rare Metals","volume":null,"pages":null},"PeriodicalIF":9.6000,"publicationDate":"2024-06-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Rare Metals","FirstCategoryId":"88","ListUrlMain":"https://doi.org/10.1007/s12598-024-02857-9","RegionNum":1,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q1","JCRName":"MATERIALS SCIENCE, MULTIDISCIPLINARY","Score":null,"Total":0}
引用次数: 0
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.
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.