Efficient degradation of Phenol by 1 T/2H-MoS2/CuFe2O4 activated peroxymonosulfate and mechanism research

1 T MoS2 has been used in peroxymonosulfate (PMS) activation technology because of its rich active sites and conductivity. In this study, CuFe2O4 was prepared by coprecipitation method, and 1 T/2H-MoS2/CuFe2O4 composite catalyst (MC-x for short) was first prepared by hydrothermal method at different reaction tempera-tures to activate PMS for Phenol degradation. MC-200 (hydrothermal temperature at 200 celcius) had the best degradation performance, and the degradation rate of Phenol was 95.8 % within 20 min. XPS spectra showed that 1 T MoS2 had the highest relative content in MC-200, which proved that 1 T MoS2 promoted the cyclic transformation of Fe3+/Fe2+and Cu2+/Cu+ in the reaction system. Finally, active radical trapping experiment and electron spin resonance (ESR) showed that SO4 center dot - was the main active substance in MC-200/PMS system. This study provides a new insight into the application of MoS2/spinel ferrite/PMS in wastewater treatment.

Automated summary

CuFe2O4 was prepared by coprecipitation method, and 1T/2H-MoS2/CuFe2O4 composite catalyst (MC-x for short) was first prepared by hydrothermal method. The MC-200 catalyst exhibited the best performance in Phenol degradation, with a degradation rate of 95.8% within 20 min. XPS analysis confirmed that 1T MoS2 promoted the cyclic transformation of Fe3+/Fe2+ and Cu2+/Cu+ in the reaction system. Active radical trapping experiment and ESR showed that SO4•－ was the main active substance in MC-200/PMS system. This study provides a new insight into the application of MoS2/spinel ferrite/PMS in wastewater treatment.