Magnetic CoFe alloy–Co supported on mesoporous carbon as an efficient catalyst for the degradation of bensulfuron-methyl: insight into the effect of calcination temperature on carbon defects and singlet oxygen

CoFe–Co/MC with abundant carbon defects was prepared to activate PMS to remove BSM. Adjusting the calcination temperature can regulate the content of carbon defect and the main active specie 1 O 2 , further improving catalytic activity.