Recent Advances and Prospective Challenges of Iron Metal–Organic Framework (MOF) Catalysts in Electrochemical Fenton Treatment Technologies

IF 6.4 2区 环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES
Taylor Mackenzie Fisher, Alexsandro Jhones dos Santos, Sergi Garcia-Segura
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引用次数: 0

Abstract

Purpose of Review

Electrochemical advanced oxidation processes have emerged as a promising technology to efficiently remove recalcitrant organic pollutants. Electro-Fenton (EF) processes are highlighted due to fast reaction kinetics, facile operating parameters, and low energy consumption. Nanomaterials with competitive surface area and catalytic activity, such as metal–organic frameworks (MOF), are being explored as catalysts to make the EF treatment process more effective. This paper reviews the recent trends in implementing iron-based MOFs in electrochemical Fenton-based technologies while highlighting needed improvements to further bolster their potential for industrial application.

Recent Findings

The majority of early research to design iron-based MOF catalysts has utilized MOF pyrolysis to design catalysts that outperform traditional iron catalysts in terms of stability and degradation efficiency. Research focus has now shifted to designing stable pure MOF catalyst material instead of MOF-derived catalysts for EF treatment, often by complementing iron with the addition of a second metal. Designing pure iron–based MOF catalysts that can be employed directly in suspension instead of embedded upon a cathode can simplify catalyst synthesis and application, bolstering their potential for industrial use. These new methods have demonstrated efficacy in both acidic and basic pH operating conditions while extending the life cycles of catalysts to achieve high removal of trace pharmaceuticals and organic dyes. Despite this, factors such as complicated synthesis and limited understanding around catalyst stability in realistic water conditions still present concern for further research improvement.

Summary

This study explores how iron-based MOFs have been used to enhance as a competitive catalyst for both electro-Fenton and heterogeneous photoelectro-Fenton (HPEF) processes for water/wastewater treatment, but other engineering considerations such as reusability and operating conditions must be improved to advance this emerging process towards higher technology readiness levels. Through this study, current research is critiqued to provide a research roadmap towards successful MOF catalyst implementation.

铁金属有机框架 (MOF) 催化剂在电化学芬顿处理技术中的最新进展和未来挑战
综述目的电化学高级氧化工艺已成为一种很有前途的高效去除难降解有机污染物的技术。电-芬顿(EF)过程因反应动力学快、操作参数简便、能耗低而备受关注。人们正在探索将金属有机框架(MOF)等具有竞争性表面积和催化活性的纳米材料作为催化剂,使 EF 处理过程更加有效。本文回顾了铁基 MOFs 在电化学芬顿技术中应用的最新趋势,同时强调了需要改进的地方,以进一步提高其工业应用潜力。现在,研究重点已转向设计稳定的纯 MOF 催化剂材料,而不是用于 EF 处理的 MOF 衍生催化剂,通常是通过添加第二种金属来补充铁。设计可直接悬浮使用而非嵌入阴极的纯铁基 MOF 催化剂可简化催化剂的合成和应用,提高其工业应用潜力。这些新方法已证明在酸性和碱性 pH 操作条件下均有效,同时还能延长催化剂的生命周期,实现对痕量药物和有机染料的高去除率。本研究探讨了铁基 MOFs 如何作为一种有竞争力的催化剂用于电-芬顿和异相光-芬顿 (HPEF) 工艺的水/废水处理,但必须改进可重复使用性和操作条件等其他工程考虑因素,以推动这一新兴工艺达到更高的技术就绪水平。本研究对当前的研究进行了点评,为成功实施 MOF 催化剂提供了研究路线图。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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来源期刊
Current Pollution Reports
Current Pollution Reports Environmental Science-Water Science and Technology
CiteScore
12.10
自引率
1.40%
发文量
31
期刊介绍: Current Pollution Reports provides in-depth review articles contributed by international experts on the most significant developments in the field of environmental pollution.By presenting clear, insightful, balanced reviews that emphasize recently published papers of major importance, the journal elucidates current and emerging approaches to identification, characterization, treatment, management of pollutants and much more.
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