Efficient and recyclable degradation of organic dye pollutants by CeO2@ZIF-8 nanozyme-based non-photocatalytic system. (1st January 2023)

• Record Type: Journal Article
• Authors: Yang, Tianhui; Liu, Xiaofeng; Zeng, Zihang; Wang, Xujun; Zhang, Peng; Feng, Bo; Tian, Ke; Qing, Taiping
• Is Part Of: Environmental pollution. Volume 316(2023)part 2
• Publication Date: 2023-01-01
• Subjects: CeO2@ZIF-8 nanozyme -- Peroxidase-like activity -- Environmental catalysis -- Dye degradation -- Starch/agarose film; Pollution -- Periodicals; Pollution -- Environmental aspects -- Periodicals; Environmental Pollution -- Periodicals; Pollution -- Périodiques; Pollution -- Aspect de l'environnement -- Périodiques; Pollution -- Effets physiologiques -- Périodiques; Pollution; Pollution -- Environmental aspects; Periodicals; Electronic journals; 363.73
• DOI: 10.1016/j.envpol.2022.120643
• Languages: English
• ISSNs: 0269-7491

Abstract

Abstract: Advanced oxidation processes-based catalysis system as the most typical pollutant degradation technology always suffer from poor durability and photo-dependent. Inspired by the fact that some nanomaterials exhibit catalytic properties closer to natural enzymes, a high peroxidase-like activity and stability CeO2 @ZIF-8 nanozyme was synthesized in this study for non-photodegradation of dyes pollution. Multiple characterization techniques were applied to prove the successful synthesis of the nanozyme. The influence of different parameters on the catalytic degradation of organic dye by nanozyme was investigated. This nanozyme achieved a maximum degradation efficiency of 99.81% for methyl orange and maintained its catalytic performance in repeated experiments. Possible degradation intermediates and pathways for methyl orange were then proposed. In addition, the CeO2 @ZIF-8 loaded starch/agarose films were prepared for the portable and recyclable remediation of real dye wastewater, which maintained more than 80% degradation efficiency after 5 successive cycles. These results suggested that nanozyme based non-photocatalytic system is a potential catalyst for dye degradation and it opens a new avenue to develop high-performance and recyclable catalysts for pollutant remediation. Graphical abstract: Image 1 Highlights: Highly stable CeO2 @ZIF-8 nanozyme is synthesized by using ZIF-8 as spatial support. CeO2 @ZIF-8 exhibits excellent peroxidase-like activity and efficient .OH production. The catalytic system can degrade organic pollutants without external stimulation. The maximum degradation efficiency of methyl orange by this system can reach 99.81%. Nanozyme loaded starch/agarose film are prepared for reusable degradation of dyes.