期刊
CATALYSTS
卷 10, 期 9, 页码 -出版社
MDPI
DOI: 10.3390/catal10090960
关键词
CuFe-LDH; N-CQDs; redox cycle; photo-Fenton; wastewater
资金
- thirteenth five-year science & technology research project of education department in Jilin province [JJKH20190130KJ]
- Natural Science Foundations of China [41602249]
- College Students Innovation and Entrepreneurship Training Project of Jilin University [201910183221]
Layered double hydroxide (LDH) materials have shown charming photo-Fenton capability for the treatment of refractory organic wastewater. In this study, CuFe-LDH hybridized with N-doped carbon quantum dots (N-CQDs) was investigated to further enhance the photo-Fenton capability. The results showed that the assembly techniques of coprecipitation and the hydrothermal method could synthesize the target material, CuFe-LDH/N-CQDs, successfully. CuFe-LDH/N-CQDs could possess a 13.5% higher methylene blue (MB) removal rate than CuFe-LDH in 30 min due to the accelerated redox cycles of Fe(III)/Fe(II) and Cu(III)/Cu(II), resulting from the photo-induced electron transfer from N-CQDs to CuFe-LDH via a d-pi conjugation electronic bridge. Moreover, CuFe-LDH/N-CQDs has excellent photo-Fenton capability in the pH range of 2-11, even after being reused five times. This study would provide an efficient and stable photo-Fenton catalyst for the treatment of refractory organic wastewater.
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