Polymeric Nanocapsule Enhances the Peroxidase-like Activity of Fe3O4 Nanozyme for Removing Organic Dyes

Catalysts

卷:12

Zhongfan Jia¹  Peng Xie²  Junqi Zha²  Honghua Han²  Wugao Wu²  Yantao Chen²  Zheng Fang³ 

[1] Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Bedford Park, SA 5042, Australia;

[2] Shenzhen Key Laboratory of Environmental Chemistry and Ecological Remediation, College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen 518060, China;

[3] State Key Laboratory of New Textile Materials & Advanced Processing Technology, School of Materials Science and Engineering, Wuhan Textile University, Wuhan 430200, China;

关键词: polymeric nanocapsule;    Fe₃O₄ nanoparticle;    nanozyme;    peroxidase-like activity;    advanced oxidation processes;    organic pollutant;   

DOI  :  10.3390/catal12060614

来源: DOAJ

【 摘 要 】

Peroxidase-like nanozymes are nanoscale materials that can closely mimic the activity of natural peroxidase for a range of oxidation reactions. Surface coating with polymer nanogels has been considered to prevent the aggregation of nanozymes. For a long time, the understanding of polymer coating has been largely limited to its stabilization effect on the nanozyme in aqueous media, while little is known about how polymer coating plays a role in interaction with substrates and primary oxidants to dictate the catalytic process. This work reported a facile sequential modification of Fe₃O₄ nanoparticles to polyacrylamide coated nanozymes, and as low as 112 mg/L samples with only 5 mg/L Fe₃O₄ could nearly quantitatively (99%) remove a library of organic dyes with either H₂O₂ or Na₂S₂O₈ as primary oxidants. The catalytic results and molecular simulation provide both experimental and computational evidence that the hydrogen bonding interaction between the reactant and nanozymes is key for the high local concentration hence catalytic efficiency. We envision that this work, for the first time, provides some insights into the role of polymer coating in enhancing the catalytic activity of nanozyme apart from the well-known water dispersity effect.

【 授权许可】

Unknown