Constructing 2D/2D ultrathin Ti3C2/SnS2 Schottky heterojunctions toward efficient tetracycline degradation

In this article, a novel 2D/2D ultrathin Ti 3 C 2 /SnS 2 Schottky heterojunctions have been prepared via a facile hydrothermal process. The properties of the heterojunction were fully characterized. The photocatalytic degradation performance of composites was examined by photo-degradation of tetracycline hydrochloride (TC-HCL) under visible light irradiation. Compared with single SnS 2 , 3% Ti 3 C 2 /SnS 2 displayed the better performance, the removal rate of TC-HCL reached 87.7% and the kinetic rate constant (k) of the optimal 3% Ti 3 C 2 /SnS 2 composite was about 2.7 times of that of bare SnS 2 . The improved photocatalytic activity of Ti 3 C 2 /SnS 2 is ascribed to the formation of 2D/2D Schottky heterojunction, which promotes the spatial charge separation and increases the surface reactive sites. • Ti 3 C 2 /SnS 2 composites were synthesized via a hydrothermal process. • 3% Ti 3 C 2 /SnS 2 composite exhibited the highest degradation efficiency for TC-HCL. • The possible photocatalytic mechanism was proposed.