期刊
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
卷 61, 期 47, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/anie.202212013
关键词
Iron Oxide Nanoparticles; Microplastics; Nanozymes; Plastic Degradation; Water Treatment
资金
- Natural Sciences and Engineering Research Council of Canada (NSERC) Alliance Grants-Plastics Science for a Cleaner Future program [ALLRP 558435-20]
This study found that hydrophilic bare Fe3O4 nanoaggregates can efficiently remove and catalytically degrade various common microplastics, with hydrogen bonding as the main adsorption force, with the characteristics of high efficiency and easy recovery.
Removal and degradation of microplastics are often carried out separately. In this work, hydrophilic bare Fe3O4 nanoaggregates allowed efficient removal of the most common microplastics including high-density polyethylene, polypropylene, polyvinyl chloride, polystyrene, and polyethylene terephthalate. Full extraction was achieved using Fe3O4 at 1 % of the mass of microplastics. Hydrogen bonding is the main force for the adsorption of Fe3O4. Unlike the more commonly used hydrophobically modified Fe3O4 nanoparticles, the bare Fe3O4 benefitted from the peroxidase-like activity of its exposed surface, enabling further catalytic degradation of microplastics with nearly 100 % efficiency and easy recovery of the Fe3O4.
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