Enhanced Fenton-like catalytic performance of N-doped graphene quantum dot incorporated CuCo2O4
| Main Authors: | Moradlou Omran, Nekoeinia, M., Salehriahi, F., Kazemi, H., Yousefinejad, S. |
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| Format: | info publication-preprint Journal |
| Terbitan: |
, 2018
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| Subjects: | |
| Online Access: |
https://zenodo.org/record/3701848 |
Daftar Isi:
- In the present study, a novel nanocomposite based on CuCo2O4 and N-doped graphene quantum dots (N-GQDs) as an iron-free heterogeneous Fenton-like catalyst was prepared by a two‒step solvothermal method. Surface morphology, chemical structure, crystal phase, surface area and the pore size distribution of the synthesized nanocomposite were characterized with field‒emission scanning electron microscopy (FE‒SEM), energy dispersive X-ray spectroscopy (EDS), Fourier Transform infrared spectroscopy (FT-IR), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), high resolution transmittance electron microscopy (HRTEH) and N2 adsorption-desorption analysis. The results showed that N-GQDs play a significant role in the enhancement of catalytic degradation of methylene blue (MB) as a model contaminant. CuCo2O4/N-GQDs nanocomposite exhibited higher degradation rate of about 47 times higher than that of pristine CuCo2O4. This promotion can be attributed to the higher surface area of CuCo2O4/N-GQDs nanocomposite compared to pristine CuCo2O4 as well as the synergistic effects between N-GQDs and CuCo2O4. The effects of pH, catalyst mass and the initial concentration of H2O2 on the catalytic degradation of MB were investigated using Box–Behnken design. Finally, the dominant reactive oxygen species generated in the degradation process were identified and the possible mechanism for the catalytic degradation of MB was purposed.