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

In this article, a novel 2D/2D ultrathin Ti₃C₂/SnS₂ 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 SnS₂, 3% Ti₃C₂/SnS₂ displayed the better performance, the removal rate of TC-HCL reached 87.7% and the kinetic rate constant (k) of the optimal 3% Ti₃C₂/SnS₂ composite was about 2.7 times of that of bare SnS₂. The improved photocatalytic activity of Ti₃C₂/SnS₂ is ascribed to the formation of 2D/2D Schottky heterojunction, which promotes the spatial charge separation and increases the surface reactive sites.