In situ construction of ZnFe-layered double oxides on biochar for improving interfacial adsorption-catalysis of ozone achieves efficient water purification

IF 9 1区工程技术 Q1 ENGINEERING, CHEMICAL

Separation and Purification Technology Pub Date : 2025-09-29 DOI:10.1016/j.seppur.2025.135358

Qiang Tan , Zhonglin Chen , Jimin Shen , Pengwei Yan , Jing Kang , Binyuan Wang , Shengxin Zhao , Yang Shen , Yabin Li

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Abstract

ZnFe-layered double oxides@biochar (ZnFe-LDO@BC) was constructed by in situ derivation of the ZnFe-LDH on biochar (BC) through a simple co-pyrolysis method for heterogeneous catalytic ozonation (HCO) progress. The dual-engine driven interface adsorption-catalysis of ozone (O₃) on ZnFe-LDO@BC achieved durable organic water decontamination. The O₃/ZnFe-LDO@BC system enhanced the utilization of O₃ and the yield of hydroxyl radicals (·OH), thus greatly benefiting organic pollutants removal. Moreover, the enrichment of O₃ and pollutants at the ZnFe-LDO@BC interface overcame the interpretation of the coexistence component, and showed unique advantages compared to traditional catalytic systems. In situ ATR-FTIR experiment and computational studies unveiled that the in situ formed Fe sites on LDO readily adsorbed H₂O to form surface -OH and thus reacted with adsorbed O₃, and mediated the ·OH dominant HCO process. The O₃/ZnFe-LDO@BC system induced non-toxic degradation of pollutants. The constructed interfacial adsorption-catalysis system proposed a new ideal for the development of HCO technology, and provided a solution approach for technical bottlenecks.

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在生物炭上原位构建锌铁层状双氧化物，改善臭氧的界面吸附催化作用，实现了高效的水净化

采用非均相催化臭氧化（HCO）过程的简单共热解方法，在生物炭（BC）上原位衍生ZnFe-LDH，构建了znfe层状双材料oxides@biochar （ZnFe-LDO@BC）。双引擎驱动的界面吸附-催化臭氧（O3）在ZnFe-LDO@BC上实现了持久的有机水净化。O3/ZnFe-LDO@BC体系提高了O3的利用率和羟基自由基（·OH）的产率，从而大大有利于有机污染物的去除。此外，O3和污染物在ZnFe-LDO@BC界面的富集克服了共存组分的解释，与传统催化体系相比显示出独特的优势。原位ATR-FTIR实验和计算研究表明，LDO上原位形成的Fe位点容易吸附H2O形成表面-OH，从而与吸附的O3发生反应，介导了·OH优势的HCO过程。O3/ZnFe-LDO@BC体系诱导污染物的无毒降解。所构建的界面吸附-催化体系为HCO技术的发展提出了新的理想，并为解决技术瓶颈提供了途径。

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来源期刊

Separation and Purification Technology 工程技术-工程：化工

CiteScore

14.00

自引率

12.80%

发文量

2347

审稿时长

43 days

期刊介绍： Separation and Purification Technology is a premier journal committed to sharing innovative methods for separation and purification in chemical and environmental engineering, encompassing both homogeneous solutions and heterogeneous mixtures. Our scope includes the separation and/or purification of liquids, vapors, and gases, as well as carbon capture and separation techniques. However, it's important to note that methods solely intended for analytical purposes are not within the scope of the journal. Additionally, disciplines such as soil science, polymer science, and metallurgy fall outside the purview of Separation and Purification Technology. Join us in advancing the field of separation and purification methods for sustainable solutions in chemical and environmental engineering.