Synthesis of Uniformly Covered Fe-MOF@COF Heterostructures for Boosting Photo-Fenton Catalysis

• Published in: Journal of inorganic and organometallic polymers and materials 2024-03, Vol.34 (3), p.1309-1324
• Main Authors: Zhang, Xue-Feng, Chang, Tian-Long, Guo, Na, Jia, Guo-Liang, Li, Xiao-Bing, Zhao, Zhao-Ye, Wang, Hui, Wang, Jun-Chuan, Wu, Xiang-Feng, Pan, Cheng-Si, Liu, Lei, Yang, Lin-Lin
• Format: Article
• Language: English
• Subjects: Bonding; Catalysis; Catalysts; Charge transfer; Chemistry; Chemistry and Materials Science; Core-shell structure; Degradation; Heterostructures; In situ leaching; Inorganic Chemistry; Iron; Leaching; Organic Chemistry; Particulate composites; Polymer Sciences; Reagents; Water sampling
• ISSN: 1574-1443; 1574-1451
• DOI: 10.1007/s10904-023-02893-5

Fe-based MOFs (Fe-MOFs) are excellent photocatalysts and have synergy well with Fenton reagents relative to other MOFs. In this work, a series of uniformly covered NH 2 -Fe-MIL-88B@TpPa-1-COF composites were synthesized using an in-situ anchoring growth strategy, which used F127 as functional molecule to decorate NH 2 -Fe-MIL-88B nanoparticles to eliminate their surface electrostatic repulsion with Tp molecules during the subsequent coating procedure. Meanwhile, the -NH 2 groups in the skeleton of NH 2 -Fe-MIL-88B could also be used as anchors to covalently connect TpPa-1-COF shell and migration channels for effective charge transfer. This uniformly covered core–shell structure would endow these composites with much more contact area and imine bond linkage between the Fe-MOFs core and COFs shell. Compared with the random packing structure, the uniformly covered Fe-MOF@COF-3 composite possessed a higher proportion of Fe 2+ to Fe 3+ . As a result, the optimized Fe-MOF@COF-3 catalyst could achieve the highest photo-Fenton degradation efficiency of 93.9% for tetracycline hydrochloride (TC⋅HCl), which was much higher than 54.8% of pure NH 2 -Fe-MIL-88B. In addition, the uniform TpPa-1-COF shell could further effectively enhance the stability of NH 2 -Fe-MIL-88B by protecting Fe ions from leaching, and the toxicity of the water samples treated with our photo-Fenton degradation process declined obviously. All these merits will endow Fe-MOF@COF-3 photo-Fenton catalyst great potential application value as in the field of environmental governance.