Electric field-engineered wood/PPy/ZIF-67 microreactor with synergistic electrocatalysis/PMS activation for high-flux and continuous water purification

IF 13.2 1区工程技术 Q1 ENGINEERING, CHEMICAL

Chemical Engineering Journal Pub Date : 2025-06-27 DOI:10.1016/j.cej.2025.165318

Xuebing Yi, Zhaocai He, Kexing Yang, Yuanjuan Bai, Gonggang Liu, Chongqing Wang, Shanshan Chang, Jinbo Hu, Xianjun Li

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引用次数: 0

Abstract

Advanced oxidation processes (AOPs) have emerged as pivotal technologies in the removal of organic pollutants by generating highly active radicals. Herein, we present an electric field-engineered continuous-flow microreactor that synergistically couples electrocatalytic oxidation with peroxymonosulfate (PMS) activation for water purification. Hierarchically structured conductive framework is fabricated through in situ growth of ZIF-67 nanosheets within polypyrrole (PPy) modified balsa wood. PPy layer establishes electron highways for efficient charge transfer, while ZIF-67 nanosheets as PMS activation catalyst enable microchannel structure regulation to intensify reactant-catalyst contact. Within each cell lumen, electric-field coupled electrocatalytic oxidation and PMS activation catalysis occur simultaneously. The integrated system of multi-reaction cooperation and microchannel enhancement demonstrates breakthrough performance, achieving a degradation rate of up to 99% for 10 mg·L−1 methylene blue under 15 V direct current voltage, which keeps over 96% with continuous operation over 16 h at high flux of 1552.5 L/m2·h. It also exhibits broad-spectrum applicability in the management of various dyes and tetracycline contained water. The work provides a pioneering strategy for water purification and microreactor design with sustainable biomass utilization.

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具有协同电催化/PMS活化的电场工程木/PPy/ZIF-67微反应器用于高通量连续水净化

高级氧化工艺（AOPs）是通过产生高活性自由基来去除有机污染物的关键技术。在此，我们提出了一种电场工程连续流微反应器，它可以协同耦合电催化氧化和过氧单硫酸盐（PMS）活化用于水净化。通过在聚吡咯（PPy）改性轻木中原位生长ZIF-67纳米片，制备了分层结构的导电框架。PPy层为有效的电荷转移建立了电子高速公路，而ZIF-67纳米片作为PMS活化催化剂，可以调节微通道结构，加强反应物-催化剂的接触。在每个细胞腔内，电场耦合的电催化氧化和PMS活化催化同时发生。多反应协同和微通道增强集成系统表现出突破性的性能，在15 V直流电压下，对10 mg·L−1亚甲基蓝的降解率可达99%，在1552.5 L/m2·h的高通量下，连续运行16 h，降解率保持在96%以上。在各种染料和含四环素的水的管理中也表现出广谱的适用性。这项工作为可持续生物质利用的水净化和微反应器设计提供了开创性的策略。

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来源期刊

Chemical Engineering Journal 工程技术-工程：化工

CiteScore

21.70

自引率

9.30%

发文量

6781

审稿时长

2.4 months

期刊介绍： The Chemical Engineering Journal is an international research journal that invites contributions of original and novel fundamental research. It aims to provide an international platform for presenting original fundamental research, interpretative reviews, and discussions on new developments in chemical engineering. The journal welcomes papers that describe novel theory and its practical application, as well as those that demonstrate the transfer of techniques from other disciplines. It also welcomes reports on carefully conducted experimental work that is soundly interpreted. The main focus of the journal is on original and rigorous research results that have broad significance. The Catalysis section within the Chemical Engineering Journal focuses specifically on Experimental and Theoretical studies in the fields of heterogeneous catalysis, molecular catalysis, and biocatalysis. These studies have industrial impact on various sectors such as chemicals, energy, materials, foods, healthcare, and environmental protection.