In order to improve the visible light catalytic activity of traditional TiO2 photocatalyst

Mn

N co-doped TiO2 photocatalyst was synthesized by sol-gel method

which improved the problem of easy recombination of photogenerated carriers. Further

zeolite was used as a carrier to solve the problem of difficult separation and recovery of the conventional photocatalyst

achieving the purpose of reusable. The crystal phase structure

element composition

microtopography

and photocatalytic activity of TiO2 photocatalyst were characterized by XRD

SEM

UV-vis

and FTIR. Results show that Mn

N co-doped TiO2/zeolite composites had higher activity than pristine TiO2. The degradation rate of malachite green in the TiO2 photocatalyst obtained under optimal doping conditions could reach 97% within 60 min in visible light

which was because the manganese ion doping could inhibit the recombination of TiO2 photogenerated carriers and promote charge separation. Meanwhile

nitrogen doping could effectively broaden the photoresponse range of TiO2. Moreover

after five usage cycles of Mn

N co-doped TiO2/zeolite composites

the degradation rate of malachite green was not greatly reduced

maintaining above 88%

which indicates that the Mn

N co-doped TiO2/zeolite composites have good photocatalytic cycle stability.