期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 297, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2021.120475
关键词
Co@MXenes catalyst; Peracetic acid; Acetylperoxy radical; Organic micropollutants
资金
- National Key R&D Program of China [2018YFD1100500]
- National Natural Science Foundation of China [51878431, 51961145106]
- Shanghai Rising-Star Program [20QC1401200]
- Shanghai Science and Technology Committee [19DZ1208400]
- State Key Laboratory of Pollution Control and Resource Reuse Foundation [PCRRE20002]
The novel Co@MXenes catalyst showed superior performance for activating PAA in water decontamination, mainly due to the = Co(III)/= Co(II) cycle triggered by the Ti3C2Tx MXene substrate, leading to enhanced PAA activation. The catalyst exhibited high stability, low cobalt ion leaching, and high reusability, making it a promising catalyst for PAA activation in wastewater treatment.
A novel Co@MXenes catalyst with unique structure was prepared through randomly anchoring cobalt on 2D sandwich-like MXenes to activate peracetic acid (PAA) for water decontamination. Compared to the conventional Co3O4 nanomaterial, the Co@MXenes catalyst exhibits superior performance for PAA activation under neutral condition. In-depth investigation revealed that the Ti3C2Tx MXene substrate triggered the = Co(III)/= Co(II) cycle, which greatly enhanced the activation of PAA. The XPS and ICP techniques further demonstrated that Co@MXenes was highly stable with extremely low cobalt ion leaching and hence a superior reusability was obtained. Moreover, acetylperoxyl radical (CH3CO3 center dot ) was identified as the primary radical species responsible for organic micropollutants degradation, exhibiting high selectivity towards contaminants containing electron-rich groups. The novel technology exhibited a high tolerance of Cl- and good performance in real wastewater treatment. This work provides a promising effective catalyst for PAA activation and will facilitate PAA application in wastewater decontamination.
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