In-situ Fe-O co-doped carbon nitride heterogenous catalyst for enhanced photo-Fenton oxidation performance towards recalcitrant organic pollutants

被引:1
|
作者
Wang, Xinyue [1 ]
Li, Jiayuan [1 ]
Li, Xiaorui [1 ]
Du, Yutong [1 ]
Li, Xiaoyan [1 ]
Qian, Jingyu [2 ]
Wang, Qiong [1 ]
Cai, Yanrong [1 ]
Zhang, Liang [1 ]
机构
[1] Bohai Univ, Inst Ocean Res, Coll Chem & Mat Engn, Liaoning Key Lab Chem Clean Prod, Jinzhou 121013, Peoples R China
[2] Jilin Univ, State Key Lab Supramol Struct & Mat, Changchun 130012, Peoples R China
关键词
Polymeric carbon nitride; Fe-O co-doped; Photo-Fenton catalysis; Recalcitrant organic pollutants; NMR-SPECTROSCOPY;
D O I
10.1016/j.apsusc.2024.161092
中图分类号
O64 [物理化学(理论化学)、化学物理学];
学科分类号
070304 ; 081704 ;
摘要
One-step and in-situ FeCl3-participated 3-participated molten urea thermal polymerization strategy is designed to prepare Fe-O co-doped carbon nitride photo-Fenton catalyst (Fe/OCN). Fe/OCN exhibits remarkable photo-Fenton catalytic oxidation capacity towards recalcitrant organic pollutants, in which 0.31 wt% Fe/OCN with optimal Fe-doping level exhibits significantly 60 and 6.3 times higher pseudo-first-order kinetic constant than single photocatalysis and Fenton system in the degradation of methyl orange. The enhancement of photo-Fenton catalytic performance is mainly ascribed to the realization of ideal Fe-O and Fe-N coordination structure in the framework of polymeric carbon nitride, which can not only serve as prime sites for the adsorption of target pollutants molecules and transfer channels for directed migration of photogenerated charges, but also well-modulate electronic structure and band structure of Fe/OCN. Accordingly, the resulting boosted charge carriers separation and transfer dynamics and increased electron density around Fe active centers facilitate -Fe(II) regeneration and H2O2 2 O 2 activation, leading to the significant production of plentiful reactive species responsible for degradation and mineralization of organic pollutants. The present work provides new insight into the optimized design and precise regulation of carbon nitride-based photo-Fenton system for advanced wastewater treatment.
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页数:15
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