期刊
APPLIED CATALYSIS B-ENVIRONMENTAL
卷 317, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apcatb.2022.121732
关键词
N-doping; Magnetization; Magnesium oxide; Peroxymonosulfate; Imidacloprid; Disinfection
资金
- Center for International Scientific Studies & Collaboration (CISSC) , Ministry of Science, Research and Technology, Iran [ICRP 990379]
- Tarbiat Modares University [IG-39801]
- Center for International Scientific Studies & Collaboration (CISSC) [ICRP 990379]
- Ministry of Science, Research and Technology, Iran
- Research Group [IG-39801]
- Spanish Ministry of Science, Innovation, and Universities for the Projects [ICRP 990379, RYC2018-024033-I]
- MCIN/AEI
- Spanish Ministry of Science, Innovation, and Universities (MICIU) [IG-39801]
- [PID2019-110441RB-C32]
- [PID2019-110441RB-C33]
Impressive degradation of Imidacloprid (IMD) and bacterial inactivation were achieved through visible light photocatalysis using N-doped MgO@Fe3O4. The study demonstrated that N-MgO@Fe3O4 exhibited excellent catalytic performance and generated various reactive species that played a key role in IMD degradation. Additionally, the catalyst showed good stability, negligible leaching and notable separability, making it a potential candidate for the treatment of contaminated waters.
Impressive Imidacloprid (IMD) degradation and bacterial inactivation were attained through the photocatalytic activation of peroxymonosulfate (PMS) via a novel, N-doped MgO@Fe3O4, under visible light. After complete characterization (XPS, XRD, FT-IR, FE-SEM, EDX, HRTEM, DRS, BET, VSM, and EIS), using [PMS]=75 mg/L, [N-MgO@Fe3O4]=150 mg/L at pH=5.6, around 95% of 10 mg/L IMD was degraded within 60 min; highly synergic interactions between the various catalytic routes were revealed. Extensive scavenger tests and EPR studies revealed that SO4 center dot-, HO center dot, and O-1(2) are generated and play a key role in IMD degradation. Tap water experiments proceeded unhindered, and only the presence of high HCO3- and PO(4)(3-)concentration resulted in a decrease in the IMD degradation efficiency, while negligible leaching, magnetization, notable separation, and reusability properties were well-preserved for six repetitive cycles. Finally, E. coli disinfection was achieved before IMD degradation, possibly affected by its transformation byproducts. The overall efficacy of N-MgO@Fe3O4 indicated the potential for implementation in contaminated waters.
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