Bi2S3 loaded MXene Ti3C2T x nanosheet with an adsorption-photocatalytic synergistic removal for tetracycline

Antibiotics in water body pose a threat to the ecosystem and human health, and the removal of antibiotics in water is imperative. Ti 3 C 2 T x has high specific surface area and structural stability, but suffers from low catalytic activity and insufficient utilization of active sites. In this paper, Ti 3 C 2 T x /Bi 2 S 3 composites (named PTB and STB, respectively) were prepared by in situ synthesis and physical composite method. The introduction of Bi 2 S 3 extends the light absorption of the composites to the visible region. Meanwhile, the electron migration resistance in PTB is smaller and the photoresponse current is larger. PTB exhibited better adsorption-photocatalytic performance than STB and pure Ti 3 C 2 T x , with a removal efficiency of 89 %. In addition, the study investigated the effects of water quality parameters and proposed a possible photocatalytic mechanism. Finally, the tetracycline adsorption and photocatalytic performance of PTB in real water samples showed good results, especially in lake water and tap water.