The Nb2O5 modified g-C3N4 were firstly prepared via an one-step heating strategy.
The Nb2O5/g-C3N4 heterojunctions can significantly enhance photocatalytic activity.
The Nb2O5/g-C3N4 heterojunctions exhibited excellent photocatalytic stability.
The catalyst can use as a promising candidate in treatment of antibiotic pollutant.