Constructing porous carbon/molybdenum sulfide composite for enhanced Fenton-like degradation of ibuprofen
In the Fenton-like reaction,the slow cyclic rate of Fe(Ⅲ)/Fe(Ⅱ)redox electron pairs and the complexity of catalyst recovery present significant challenges.This investigation synthesized a porous carbon(Fe-N-C)supported molybdenum sulfide carbon cloth composite material(Fe-N-C/MoS2NS)via a hydrothermal-calcination approach,subsequently applying it to the heterogeneous Fenton-like reaction for ibuprofen(IBU)degradation in aquatic environments.The composite's phase,chemical composition,and thermal stability were scrutinized employing field emission scanning electron microscopy,transmission electron microscopy,laser micro-Raman spectroscopy,and thermogravimetric analysis.We investigated the influence of diverse materials and pH values on degradation efficiency,as well as the general applicability and robustness of the degradation process.Moreover,we elucidated the catalytic degradation mechanism.The findings revealed that Fe-N-C/MoS2NS outperformed Fe-N-C and MoS2NS,exhibiting superior catalytic degradation capabilities.Complete IBU degradation was achieved within 60 min under pH=3 and a H2O2 concentration of 5.0 mmol/L.The system exhibited broad efficacy in degrading pharmaceutical pollutants,maintaining degradation efficiency above 90％ after four cycles,underscoring exceptional catalytic stability.Free radical probes and electron paramagnetic resonance spectroscopy pinpointed hydroxyl radicals and singlet oxygen as primary agents in IBU degradation within the Fe-N-C/MoS2NS system.Furthermore,MoS2NS effectively facilitated the redox transformation of Fe(Ⅲ)/Fe(Ⅱ)electron pairs,addressing limitations inherent in conventional Fenton systems and offering novel perspectives for advancing oxidation technologies in water treatment.
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