Abstract
In this study, SnS2/Ti3C2 was synthesized by combining SnS2 (synthesized via oil bath method) with Ti3C2 (prepared from etching of Al layers from Ti3AlC2 MAX phase). The morphology, structure and photochemical properties of the catalyst were analyzed by various characterization methods. The photocatalytic performance of sample was studied by the degradation of Rhodamine B (RhB) under xenon lamp irradiation. Results showed that SnS2/Ti3C2 could achieve 99% photocatalytic degradation of RhB within 60 min, which was much higher than the 38% photocatalytic degradation of SnS2. In addition, the RhB degradation rate of SnS2/Ti3C2 still reached 93% after 5 cycles. The excellent photocatalytic activity and durability were mainly attributed to the formation of Schottky heterojunction between SnS2 and Ti3C2, which is very advantageous for efficiently separating and transferring charge carriers. The work functions of SnS2 and Ti3C2Tx were calculated through the DFT calculations, which were 5.22 eV and 5.69 eV respectively. According to barder charge analysis, the charge transfer between SnS2 and Ti3C2 was 0.04 e. Meanwhile, radical trapping experiments confirmed that h+ and •O2− were the main active species in the reaction system. As a visible light-responsive catalyst, SnS2/Ti3C2 can be effectively applied to the degradation of organic dye pollutants, and which has broad application prospects.
Published Version
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