This research highlights the use of a WO3: CeO2@MXene/gC3N4 (MGWC) nanodisk as a versatile material. MGWC demonstrates efficient photocatalytic degradation of moxifloxacin (MOF) in water under sunlight and also shows great promise for high-performance supercapacitor applications. MGWC was synthesized using a modified hydrothermal method and thoroughly characterized using various techniques. The MGWC showed a band gap energy of 2.79 eV determined through UV–Vis DRS analysis and an average crystallite size of 39.6 nm calculated from XRD. A promising photocatalytic activity was observed for the degradation of MOF, outperforming other photocatalysts. Additionally, preliminary studies examined variations in catalyst concentration, pH, kinetics, electrolytes, scavengers, reusability, and TOC, contributing valuable insights. Under optimal conditions, the MOF achieved almost complete degradation, reaching about 99.7% within 180 min using the MGWC photocatalyst. Additionally, MGWC exhibits promising potential in supercapacitor applications. EIS and CV studies have been used to examine MGWC’s exceptional charge transfer properties. CV tests confirm the pseudocapacitive nature of MGWC electrodes. GCD studies of MGWC exhibit a high specific capacitance of 551 F/g at 1 A/g with incomparable capacitance retention of 98.1% over 10,000 cycles. This research not only aids in reducing emerging environmental pollutants but also sets the stage for sustainable energy solutions.

Impact of WO3:CeO2@MXenegC3N4 nano disk on sunlight-driven photocatalytic removal of fluoroquinolone antibiotic and high-performance supercapacitor application
    Abstract
    1 Introduction
    2 Experimental
        2.1 Material and methods
        2.2 Preparation
            2.2.1 Preparation of gC3N4
            2.2.2 Preparation of MXene
            2.2.3 Preparation of Tungsten trioxide
            2.2.4 Preparation of WO3:CeO2gC3N4
            2.2.5 Preparation of WO3:CeO2MXenegC3N4
    3 Result and discussion
        3.1 Atomic force microscope (AFM)
        3.2 FT-IR analysis
        3.3 UV–Vis DRS analysis
        3.4 X-ray diffraction analysis of MGWC​
        3.5 FE-SEM analysis of MGWC​
        3.6 HR-TEM analysis of MGWC​
        3.7 EDAX and elemental analysis of MGWC​
        3.8 X-ray photoelectron spectroscopy (XPS)
        3.9 BET analysis of MGWC​
    4 Applications
        4.1 Photocatalytic studies
            4.1.1 Effect of MGWC photocatalyst loading
            4.1.2 Effect of various MOF concentration
            4.1.3 Effect of aqueous pH
        4.2 Kinetic degradation studies of MOF under sunlight irradiation
        4.3 Effect of various electrolytes
        4.4 TOC analysis of MOF.
        4.5 Scavengers and reusability studies
        4.6 Possible photocatalytic degradation mechanism
        4.7 Electrochemical analysis
    5 Conclusion
    Acknowledgements 
    References

• Suganya Josephine Gali Anthoni(Department of Humanities and Sciences ‑ Chemistry, Centre for Nanotechnology Research, Aarupadai Veedu Institute of Technology – Vinayaka Mission Research Foundation, Deemed to Be University, Rajiv Gandhi Salai, Paiyanoor, Kanchipuram 603104, India) Corresponding author
• Rubesh Ashok Kumar Selvakumar(Department of Humanities and Sciences ‑ Chemistry, Centre for Nanotechnology Research, Aarupadai Veedu Institute of Technology – Vinayaka Mission Research Foundation, Deemed to Be University, Rajiv Gandhi Salai, Paiyanoor, Kanchipuram 603104, India, Centre for Applied Nanomaterials, Chennai Institute of Technology, Chennai 600 069, Tamil Nadu, India) Corresponding author
• Vasvini Mary Devaraj(Department of Humanities and Sciences ‑ Chemistry, Centre for Nanotechnology Research, Aarupadai Veedu Institute of Technology – Vinayaka Mission Research Foundation, Deemed to Be University, Rajiv Gandhi Salai, Paiyanoor, Kanchipuram 603104, India, Centre for Applied Nanomaterials, Chennai Institute of Technology, Chennai 600 069, Tamil Nadu, India)
• Jih‑Hsing Chang(Department of Applied Chemistry, Chaoyang University of Technology, Taichung 413310, Taiwan)
• Rachel Angeline Lenin(Department of Applied Chemistry, Chaoyang University of Technology, Taichung 413310, Taiwan, Department of Environmental Engineering and Management, Chaoyang University of Technology, Taichung 413310, Taiwan)
• Nagarani Sandran(Department of Environmental Engineering and Management, Chaoyang University of Technology, Taichung 413310, Taiwan) Corresponding author