1：Experimental Design and Method Selection:

The ternary photocatalyst PEDOT@ZnO@MWCNTs was fabricated using chemical oxidative polymerization. The fabrication involved functionalization of MWCNTs with acid treatment, preparation of ZnO@MWCNTs composite via ultrasonication, and polymerization of EDOT with APS in the presence of ZnO@MWCNTs under nitrogen atmosphere. The methodology included spectroscopic characterizations (UV-Vis, FT-IR, XRD), morphological studies (SEM, TEM), electrochemical analyses (CV, EIS), and photocatalytic degradation studies under visible light.

2：Sample Selection and Data Sources:

Samples included functionalized MWCNTs, ZnO nanorods, and the fabricated photocatalyst. The dye methyl orange (MO) was used as the target pollutant. Data were acquired from laboratory experiments using specified equipment.

3：List of Experimental Equipment and Materials:

Equipment: PHILIPS CM30 TEM, Hitachi U-3010 UV-Vis spectrophotometer, Perkin Elmer RXI FT-IR spectrometer, Bruker Model D-8 Advance X-ray Diffractometer, CARL ZEISS EVO 18 SEM, corr test CS 2350 potentiostat, Quantachrome Autosorb Automated Gas Sorption System, photocatalytic reactor from Tejas Lele. Materials: Ethylenedioxythiophene (EDOT), poly(4-styrenesulfonic acid) (PSS), ammonium peroxydisulfate (APS), ZnO nanorods, MWCNTs, methyl orange dye, H2SO4, HNO3, citric acid, NaOH, double distilled water.

4：Experimental Procedures and Operational Workflow:

Functionalization of MWCNTs with H2SO4/HNO3 mixture, refluxing, filtering, and washing. Preparation of ZnO@MWCNTs by ultrasonication. Fabrication of PEDOT@ZnO@MWCNTs by adding APS to EDOT/PSS dispersion, followed by addition of ZnO@MWCNTs, stirring under nitrogen, centrifugation, washing, and drying. Characterization using TEM, UV-Vis, FT-IR, XRD, SEM, CV, EIS, BET. Photodegradation study: dispersion of photocatalyst in MO solution, magnetic stirring in dark, irradiation with visible light, periodic sampling, centrifugation, and UV-Vis analysis.

5：Data Analysis Methods:

Photodegradation efficiency calculated using absorbance decay. Kinetics analyzed with pseudo-first-order model. Electrochemical data analyzed via CV and EIS Nyquist plots. Surface area and porosity determined from BET isotherms and BJH method. COD analysis for mineralization assessment.