What question did this study set out to answer?

The aim is to synthesize a ZnS-MXene-TiO2 nanocomposite for effective photocatalytic degradation of methylene blue dye.

April 18, 2026Advanced Engineering Materials0 citationsOpen Access

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

LKLatiful Kabir DKDohyun Kim MSMinho Song

Key Points

The aim is to synthesize a ZnS-MXene-TiO2 nanocomposite for effective photocatalytic degradation of methylene blue dye.
Synthesis of ZnS-MXene-TiO2 nanocomposite heterojunction
Characterization by X-ray diffraction, SEM, TEM, XPS, UV-vis, PL, DRS, EIS, photocurrent, and CV tests
Assessment of photocatalytic activity using standard dyes for degradation analysis
The bandgap of the ternary composite is reduced to 2.95 eV, enhancing photocatalytic activity
Achieved 98.2% degradation of methylene blue and 98.0% degradation of tetracycline under visible light
High surface area facilitates better adsorption of dye molecules on the catalyst

Abstract

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.

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