Cucurbit[6]uril-heteropoly acids self-assemblies for adsorption and photocatalytic synergistic removal of diquat and paraquat in water

IF 6.3 2区工程技术 Q1 ENGINEERING, CHEMICAL

Journal of water process engineering Pub Date : 2025-03-20 DOI:10.1016/j.jwpe.2025.107518

Liling Zeng, Xianyan Ao, Manli Xu, Yunqian Zhang, Zhu Tao

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Abstract

The synergistic removal of organic pollutants by adsorption and photocatalysis can be achieved by adsorption of enriched pollutants, followed by photocatalytic degradation to decompose the pollutants into non-toxic substances. In this work, a category of adsorption-photocatalytic bifunctional composite materials Q[6]-HPAs have been developed through the self-assembly of cucurbit[6]uril (Q[6]) and heteropoly acids (HPAs) like phosphomolybdic acid (PMA), phosphotungstic acid (PTA) and silicotungstic acid (STA). These composites exhibit enhanced surface area, structural stability, and extended light absorption into the visible range. Notably, Q[6]-HPAs have surface charge properties that attract cations and an energy band structure suitable for the generation of reactive oxygen species, thus possessing the potential for efficient adsorption and photodegradation of cationic pesticides. Among which, Q[6]-PMA and Q[6]-PTA removed over 95 % of diquat and paraquat through sequential adsorption and photodegradation. Electrostatic attraction drives the adsorption process, and ·O₂⁻ and ·OH radicals detected via Electron Spin Resonance (ESR) are the key to photodegradation. Ultimately, Liquid Chromatography-Mass Spectrometer (LC-MS) analysis revealed potential degradation intermediates and products, and toxicity analysis was performed.

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来源期刊

Journal of water process engineering Biochemistry, Genetics and Molecular Biology-Biotechnology

CiteScore

10.70

自引率

8.60%

发文量

846

审稿时长

24 days

期刊介绍： The Journal of Water Process Engineering aims to publish refereed, high-quality research papers with significant novelty and impact in all areas of the engineering of water and wastewater processing . Papers on advanced and novel treatment processes and technologies are particularly welcome. The Journal considers papers in areas such as nanotechnology and biotechnology applications in water, novel oxidation and separation processes, membrane processes (except those for desalination) , catalytic processes for the removal of water contaminants, sustainable processes, water reuse and recycling, water use and wastewater minimization, integrated/hybrid technology, process modeling of water treatment and novel treatment processes. Submissions on the subject of adsorbents, including standard measurements of adsorption kinetics and equilibrium will only be considered if there is a genuine case for novelty and contribution, for example highly novel, sustainable adsorbents and their use: papers on activated carbon-type materials derived from natural matter, or surfactant-modified clays and related minerals, would not fulfil this criterion. The Journal particularly welcomes contributions involving environmentally, economically and socially sustainable technology for water treatment, including those which are energy-efficient, with minimal or no chemical consumption, and capable of water recycling and reuse that minimizes the direct disposal of wastewater to the aquatic environment. Papers that describe novel ideas for solving issues related to water quality and availability are also welcome, as are those that show the transfer of techniques from other disciplines. The Journal will consider papers dealing with processes for various water matrices including drinking water (except desalination), domestic, urban and industrial wastewaters, in addition to their residues. It is expected that the journal will be of particular relevance to chemical and process engineers working in the field. The Journal welcomes Full Text papers, Short Communications, State-of-the-Art Reviews and Letters to Editors and Case Studies