Accelerated Redox Cycles of Fe(III)/Fe(II) and Cu(III)/Cu(II) by Photo-Induced Electron from N-CQDs for Enhanced Photo-Fenton Capability of CuFe-LDH

Catalysts

Lu Liu¹  Di Wu²  Zhe Ma³  Zhe Dong³  Zhang Fang³  Yonglei An³  Xingyuan Du³  Yang Liu³  Zheng Cui⁴  Xiaochen Sun⁴ 

[1] Changchun Institute of Technology, Changchun 130012, China;Jilin Tuoda Environmental Protection Equipment & Engineering Co., Ltd., Changchun 130062, China;Key Laboratory of Groundwater Resources and Environment (Jilin University), Ministry of Education, Changchun 130021, China;State Key Laboratory of Superhard Materials, College of Physics, Jilin University, Changchun 130012, China;

关键词: CuFe-LDH;    N-CQDs;    redox cycle;    photo-Fenton;    wastewater;   

DOI  :  10.3390/catal10090960

来源: DOAJ

【 摘 要 】

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–π 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.

【 授权许可】

Unknown