Fe3O4-MWCNT Magnetic Nanocomposites as Efficient Fenton-Like Catalysts for Degradation of Sulfamethazine in Aqueous Solution

作者：Tang, Juntao; Wang, Jianlong^*

来源：ChemistrySelect, 2017, 2(33): 10727-10735.

DOI：10.1002/slct.201702249

• antibiotics
• heterogeneous catalysis
• heterogeneous Fenton reaction
• Fe3O4/MWCNTs
• sulfamethazine

Sulfamethazine (SMT) is a ubiquitous pollutant due to its extensive application, and it cannot be effectively removed by conventional wastewater treatment processes. In this study, a magnetic Fe3O4 nanoparticles immobilized on multi-walled carbon nanotubes (Fe3O4/MWCNTs) composites were synthesized, characterized and used as heterogeneous Fenton-like catalysts for SMT degradation. The MWCNTs scaffold with large surface area and good adsorption capacity can improve Fe3O4 dispersibility and facilitate pollutant adsorption. The Fe3O4/MWCNTs exhibited enhanced catalytic activity for SMT degradation. The effects of initial pH, H2O2 dosage, catalyst dosage, initial SMT concentrations and temperature on SMT degradation were investigated. The results showed that the removal efficiency of SMT and total organic carbon was 98.3% and 59.7%, respectively, under optimal reaction conditions. The Fe3O4/MWCNTs also showed stable catalytic activity, reusability and easy recycling. Furthermore, the main oxidation products of SMT degradation and the primary active radical were identified, and the possible catalytic mechanism was tentatively proposed.

• 出版日期2017-11-21
• 单位清华大学