Applying molecular oxygen for organic pollutant degradation: Strategies, mechanisms, and perspectives

IF 14 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Environmental Science and Ecotechnology Pub Date : 2024-08-02 DOI:10.1016/j.ese.2024.100469

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Abstract

Molecular oxygen (O₂) is an environmentally friendly, cost-effective, and non-toxic oxidant. Activation of O₂ generates various highly oxidative reactive oxygen species (ROS), which efficiently degrade pollutants with minimal environmental impact. Despite extensive research on the application of O₂ activation in environmental remediation, a comprehensive review addressing this topic is currently lacking. This review provides an informative overview of recent advancements in O₂ activation, focusing on three primary strategies: photocatalytic activation, chemical activation, and electrochemical activation of O₂. We elucidate the respective mechanisms of these activation methods and discuss their advantages and disadvantages. Additionally, we thoroughly analyze the influence of oxygen supply, reactive temperature, and pH on the O₂ activation process. From electron transfer and energy transfer perspectives, we explore the pathways for ROS generation during O₂ activation. Finally, we address the challenges faced by researchers in this field and discuss future prospects for utilizing O₂ activation in pollution control applications. This detailed analysis enhances our understanding and provides valuable insights for the practical implementation of organic pollutant degradation.

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应用分子氧降解有机污染物：战略、机制和前景

分子氧（O2）是一种环保、经济、无毒的氧化剂。活化 O2 会产生各种高氧化性活性氧（ROS），从而有效降解污染物，并将对环境的影响降至最低。尽管对氧气活化在环境修复中的应用进行了广泛的研究，但目前还缺乏针对这一主题的全面综述。本综述翔实地概述了氧气活化的最新进展，重点关注三种主要策略：光催化活化、化学活化和氧气的电化学活化。我们阐明了这些活化方法各自的机理，并讨论了它们的优缺点。此外，我们还深入分析了氧气供应、反应温度和 pH 值对 O2 活化过程的影响。从电子传递和能量转移的角度，我们探讨了氧气活化过程中产生 ROS 的途径。最后，我们探讨了研究人员在这一领域面临的挑战，并讨论了在污染控制应用中利用氧气活化的未来前景。这些详细的分析加深了我们的理解，并为有机污染物降解的实际应用提供了宝贵的见解。

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来源期刊

Environmental Science and Ecotechnology Multiple-

CiteScore

20.40

自引率

6.30%

发文量

审稿时长

18 days

期刊介绍： Environmental Science & Ecotechnology (ESE) is an international, open-access journal publishing original research in environmental science, engineering, ecotechnology, and related fields. Authors publishing in ESE can immediately, permanently, and freely share their work. They have license options and retain copyright. Published by Elsevier, ESE is co-organized by the Chinese Society for Environmental Sciences, Harbin Institute of Technology, and the Chinese Research Academy of Environmental Sciences, under the supervision of the China Association for Science and Technology.