CuS@ZnIn2S4 p-n type heterojunction photocatalyst with LED visible light response

In this work, CuS@ZnIn2S4 p-n heterojunction was prepared by the ultrasonic composite method for the first time. Under LED (5 W) visible light excitation, the methylene blue (MB) degradation efficiency of CuS@ZnIn2S4- 3 nanocomposite reached 95.8% in 60 min. Compared with ZnIn2S4, the spectral response range of CuS@Z-nIn2S4-3 was widened, and the optical absorption capacity was increased by about 6 times. The electrochemical results revealed that CuS@ZnIn2S4-3 has good photogenerated carrier separation efficiency. Compared with ZnIn2S4, the photocurrent of CuS@ZnIn2S4-3 is increased by 2.2 times and the impedance is reduced by 4.16 times. Finally, the photocatalytic mechanism of CuS@ZnIn2S4 was explored in detail.

Automated summary

In this study, CuS@ZnIn2S4 p-n heterojunction was prepared for the first time using the ultrasonic composite method. Under LED visible light excitation, the CuS@ZnIn2S4-3 nanocomposite achieved a methylene blue (MB) degradation efficiency of 95.8% in 60 minutes. Compared to ZnIn2S4, CuS@ZnIn2S4-3 exhibited a widened spectral response range and approximately 6 times increased optical absorption capacity. Electrochemical results demonstrated that CuS@ZnIn2S4-3 had excellent photogenerated carrier separation efficiency, with a 2.2 times increased photocurrent and a 4.16 times reduced impedance compared to ZnIn2S4. Finally, the photocatalytic mechanism of CuS@ZnIn2S4 was extensively explored.