This repository contains the complete experimental dataset, characterization figures, and performance analysis for the ZnO–Co₃O₄/C S-scheme heterojunction photocatalyst derived from a bimetallic ZIF precursor. This work focuses on visible-light-driven hydrogen evolution and CO₂ reduction.
- 🌿 Green Synthesis: Eco-friendly water–ethanol solvothermal synthesis (E-factor: 3.2) followed by controlled thermal conversion at 600 °C under Nitrogen (N₂) atmosphere.
- 🚀 High H₂ Evolution: Optimized heterostructure achieved a remarkable hydrogen evolution rate of 2340 ± 45 µmol g⁻¹ h⁻¹ under visible-light irradiation.
- 💎 Apparent Quantum Yield (AQY): Demonstrated high photocatalytic efficiency with an AQY of 8.2% at 450 nm.
- 🌍 CO₂ Reduction Performance: Achieved a CO production rate of 58.7 ± 2.1 µmol g⁻¹ h⁻¹ with a CO selectivity of ~83–84% (calculated from CO/(CO+CH₄)).
- ⚡ S-Scheme Charge Transfer: Efficient spatial charge separation supported by comprehensive PL quenching, EIS, Mott–Schottky, and ESR analyses.
- 🔄 Exceptional Stability: Maintained 95.5% activity retention after five successive cycles, showing excellent robustness against photocorrosion.
├── raw_data/ # Raw experimental results (CSV)
│ ├── GC_FID_CO2products_raw.csv # CO2 reduction product data (FID)
│ ├── GC_TCD_H2_raw.csv # H2 evolution data (TCD, N2 carrier gas)
│ ├── XRD_raw_counts.csv # Raw X-Ray Diffraction counts
│ ├── UV_Vis_DRS_raw.csv # UV-Vis Diffuse Reflectance data
│ ├── PL_raw_data.csv # Photoluminescence spectra
│ └── H2_evolution_triplicate.csv # H2 evolution reproducibility data
├── processed_data/ # Cleaned and analyzed datasets
│ ├── MOF_SScheme_Complete_Dataset.xlsx # Master dataset
│ ├── Scherrer_analysis.csv # Crystallite size calculations
│ ├── EIS_fitted_parameters.csv # Electrochemical Impedance data
│ └── Table8_stability.csv # Recycling performance metrics
└── figures/ # Publication-quality visualizations
├── Fig3a_XRD_patterns.png # Structural validation (ZnO, Co3O4/C, Heterostructure)
├── Fig5_XPS_complete.png # Elemental and Valence state analysis
├── Fig6_7_H2_CO2_performance.png # Photocatalytic rate comparisons
└── Fig9_mechanism_validation.png # S-scheme charge transfer model
| Parameter | Hydrogen Evolution | CO₂ Reduction |
|---|---|---|
| Catalyst Loading | 50 mg (1.0 g L⁻¹) | 50 mg (1.0 g L⁻¹) |
| Light Source | 300 W Xe lamp, λ > 420 nm | 300 W Xe lamp, λ > 420 nm |
| Carrier Gas (GC) | Nitrogen (N₂) | Nitrogen (N₂) / CO₂ |
| Sacrificial Agent | Na₂S/Na₂SO₃ | TEOA (10 vol%) |
| AQY | 8.2% @ 450 nm | - |
The data files provided are standardized for direct use in analytical software (OriginPro, Python, MATLAB).
- All samples are labeled consistently: ZnO, Co3O4/C, and ZnO–Co3O4/C.
- Raw data includes baseline corrections where applicable.
If you use this dataset or the figures in your research, please cite the original work:
Green-Synthesized ZnO–Co₃O₄/C S-Scheme Heterojunction Photocatalyst Derived from Bimetallic ZIF Precursor for Visible-Light-Driven Hydrogen Evolution and CO₂ Reduction. Nisha Angeline M, Manikandan S K. (2026).
Author: nishaangelinem-coder
Contact: GitHub Profile
Keywords: S-scheme photocatalysis, MOF-derived, CO2 Reduction, Hydrogen Evolution, Green Synthesis.