Construction of a g-C3N4/PANI/α-MnO2 direct Z-scheme heterojunction with oxygen-rich vacancies for enhancing photocatalytic degradation of tetracycline hydrochloride under visible light

g-C 3 N 4 /PANI/α-MnO 2 is fabricated by hydrothermal and in situ chemical oxidation polymerization, and displays outstanding photocatalytic degradation performance towards antibiotics under visible light irradiation.