Recovery of doped nickel hydroxides from metal-smelting wastewater for electrocatalytic upcycling of waste polyester

IF 10.7 Q1 CHEMISTRY, PHYSICAL

Chem Catalysis Pub Date : 2026-03-17 DOI:10.1016/j.checat.2026.101654

Shiying Wu, Chenghao Jia, Chenyu Zhou, Jianle Wang, Xueming Liu, Yan Chen, Zhang Lin

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引用次数: 0

Abstract

The discharge of untreated metal-smelting wastewater with various heavy metal ions poses significant risks to ecosystems. Conventional approaches for recycling these ions into functional materials require energy-intensive separation and resynthesis. This study presents a one-step electrodeposition strategy to directly recover multiple metal ions from wastewater while simultaneously reconstructing them into a high-performance doped catalyst (NiCoFe hydroxide). This catalyst upgrades waste polyethylene terephthalate (PET) into valuable organic acid with a Faradaic efficiency of 97.05% and a selectivity of 93.46% at 0.6 V, rivaling state-of-the-art benchmarks. Spectroscopy and theoretical calculations reveal that dopants elevate Ni valence and promote NiOOH active phase formation, enabling high reactivity. An economic analysis demonstrates that upcycling 1 ton of PET waste can generate approximately $373 in net revenue, highlighting promising economic viability. This methodology offers a generalizable platform for transforming waste metals into functional materials for energy and environmental applications.

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金属冶炼废水中掺杂羟基镍的回收及其在废聚酯电催化升级利用中的应用

未经处理的含多种重金属离子的金属冶炼废水的排放对生态系统构成重大威胁。将这些离子回收为功能材料的传统方法需要大量的能源分离和再合成。本研究提出了一种一步电沉积策略，可直接从废水中回收多种金属离子，同时将其重构为高性能掺杂催化剂（氢氧化镍镍）。该催化剂将废弃的聚对苯二甲酸乙二醇酯（PET）转化为有价值的有机酸，在0.6 V下的法拉第效率为97.05%，选择性为93.46%，可与最新的基准相媲美。光谱学和理论计算表明，掺杂剂提高了Ni价，促进了NiOOH活性相的形成，从而实现了高反应活性。一项经济分析表明，对1吨PET废物进行升级回收可以产生大约373美元的净收入，这凸显了其经济可行性。该方法为将废金属转化为能源和环境应用的功能材料提供了一个可推广的平台。

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来源期刊

Chem Catalysis

CiteScore

10.50

自引率

6.40%

发文量

期刊介绍： Chem Catalysis is a monthly journal that publishes innovative research on fundamental and applied catalysis, providing a platform for researchers across chemistry, chemical engineering, and related fields. It serves as a premier resource for scientists and engineers in academia and industry, covering heterogeneous, homogeneous, and biocatalysis. Emphasizing transformative methods and technologies, the journal aims to advance understanding, introduce novel catalysts, and connect fundamental insights to real-world applications for societal benefit.