Sustainable water decontamination in a fluidic sequential electrochemical reactor

IF 20.2 1区化学 Q1 CHEMISTRY, PHYSICAL

Applied Catalysis B: Environmental Pub Date : 2024-01-06 DOI:10.1016/j.apcatb.2024.123708

Mengjiao Xie , Wentian Zheng , Meng Sun , Shijie You , Yanbiao Liu

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Abstract

Here, we demonstrate an integrated fluidic sequential electrochemical system for effective water decontamination. The system consists of a Ti mesh anode deposited with nanoscale IrO₂ and a CNT filter functionalized with nanoconfined Fe₂O₃. By conducting anodic oxygen evolution reaction (OER) and 2e^– oxygen reduction reaction (ORR) sequential electrolysis, our system enables sustainable O₂ generation at the anode, followed by transformation of O₂ into H₂O₂ at the cathode, which then led to the production of ¹O₂ in the presence of nanoconfined Fe₂O₃. No chemical inputs were needed nor side products occurred during the whole sequential electrochemical processes. The effectiveness of the system was evaluated using tetracycline as a model emerging contaminant. Recirculating at 3 mL min^–1, the system exhibited negligible iron and iridium leaching (≤0.01 mg L^–1) and high tetracycline degradation efficiency (≥95%). Such excellent efficacy can be maintained across a wide pH range and in complicated water matrices.

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流体序贯电化学反应器中的可持续水净化技术

在这里，我们展示了一种用于有效净化水的集成流体顺序电化学系统。该系统由一个沉积有纳米级 IrO2 的钛网阳极和一个由纳米级 Fe2O3 功能化的 CNT 过滤器组成。通过进行阳极氧进化反应（OER）和2e-氧还原反应（ORR）的顺序电解，我们的系统能够在阳极持续产生O2，然后在阴极将O2转化为H2O2，进而在纳米级Fe2O3的存在下产生1O2。在整个连续的电化学过程中，既不需要化学投入，也不会产生副产品。以四环素作为新出现的污染物模型，对该系统的有效性进行了评估。该系统以 3 mL min-1 的速度循环，铁和铱的浸出量可忽略不计（≤0.01 mg L-1），四环素降解效率高（≥95%）。在很宽的 pH 值范围和复杂的水基质中都能保持如此出色的功效。

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来源期刊

Applied Catalysis B: Environmental 环境科学-工程：化工

CiteScore

38.60

自引率

6.30%

发文量

1117

审稿时长

24 days

期刊介绍： Applied Catalysis B: Environment and Energy (formerly Applied Catalysis B: Environmental) is a journal that focuses on the transition towards cleaner and more sustainable energy sources. The journal's publications cover a wide range of topics, including: 1.Catalytic elimination of environmental pollutants such as nitrogen oxides, carbon monoxide, sulfur compounds, chlorinated and other organic compounds, and soot emitted from stationary or mobile sources. 2.Basic understanding of catalysts used in environmental pollution abatement, particularly in industrial processes. 3.All aspects of preparation, characterization, activation, deactivation, and regeneration of novel and commercially applicable environmental catalysts. 4.New catalytic routes and processes for the production of clean energy, such as hydrogen generation via catalytic fuel processing, and new catalysts and electrocatalysts for fuel cells. 5.Catalytic reactions that convert wastes into useful products. 6.Clean manufacturing techniques that replace toxic chemicals with environmentally friendly catalysts. 7.Scientific aspects of photocatalytic processes and a basic understanding of photocatalysts as applied to environmental problems. 8.New catalytic combustion technologies and catalysts. 9.New catalytic non-enzymatic transformations of biomass components. The journal is abstracted and indexed in API Abstracts, Research Alert, Chemical Abstracts, Web of Science, Theoretical Chemical Engineering Abstracts, Engineering, Technology & Applied Sciences, and others.