Novel Tailoring of Ternary ZnS‐MXene‐TiO 2 Nanocomposite Heterojunction and Its Tunable Electrochemical Properties With Enhanced Photocatalytic Degradation

In this study, we successfully synthesized ZnS‐MXene‐TiO 2 nanocomposite heterojunction to apply for photocatalytic degradation of the methylene blue dye (MB). This nanocomposite significantly improves light absorption, charge separation, and active sites area. The synthesized ternary nanocomposite is explained by X‐ray diffraction (XRD), scanning electron microscopy (SEM), tunneling electron microscopy (TEM), X‐ray photoelectron spectroscopy (XPS), ultraviolet–visible (UV–vis), PL (photoluminescence spectroscopy), diffuse reflectance spectroscopy (DRS), electrochemical impedance spectroscopy (EIS), photocurrent, and cyclic voltammogram (CV) test. The energy bandgap of the composite (ZnS‐MXene), (MXene‐TiO 2 ), and (ZnS‐MXene‐TiO 2 ) is found to be 3.20, 3.05, and 2.95 eV, respectively. The ternary composite of narrow bandgap exhibits enhanced photocatalytic activity through UV photon more excitation. Due to the high surface area, it can increase the adsorption of MB molecules onto the catalyst surface and will be cost‐effective considering the synthesized materials. The photocatalytic analysis of the nanocomposite is utilized standard dyes of methylene blue (MB) degradation percentage (98.2%) and pollutant of tetracycline (TC) degradation efficiency (98.0%) under visible light. The analysis of the (ZnS‐MXene‐TiO 2 ), which has good catalytic properties for the degradation of MB and TC.