Iodine-nitrogen codoped magnetic photocatalyst was prepared.
A suitable I/Ti ratio was required for good performance of Ix-N-T/CMAC.
I0.1-N-T/CMAC own the best photocatalytic performance and can be separated easily.
Both Cl− and SO42− have negative effect on the photocatalytic degradation of SA.
Suitable concentration of humic acid could enhance the photodegradation of SA.