Photocatalytic performance of TiO2/g-C3N4 nanocomposite modified with carbon quantum dots for effective dye degradation: experiments and DFT studies

The water resources have been contaminated by the synthetic dyes that requires the effective wastewater treatment solutions due to the significant environmental and health challenges. This study reports the synthesis of a CQDs/g-C3N4/TiO2 ternary composite using a hydrothermal route to improve the photocatalytic degradation of methylene blue (MB). The structural and morphological properties of the synthesized composite are investigated using FTIR, XRD, Raman, SEM, TEM, and UV-Vis spectroscopy. The photocatalytic activity evaluated under UV light, demonstrates about 98.9 % MB degradation efficiency under optimized conditions of pH, catalyst dosage, and dye concentration. The findings emphasize the synergistic effects of the composite resulting with the enhanced photocatalytic performance. The First-Principles Density function theory (DFT) based calculations are carried out to elucidate the mechanism for improving the performance of the composite system. This work presents a facile method for treating wastewater and highlighted the potential of CQDs/g-C3N4/TiO2 nanocomposites for environmental remediation.

Text 124298.pdf - Published Version Restricted to Repository staff only Download (13MB) Official URL or Download Paper: https://www.sciencedirect.com/science/article/pii/...

Actions (login required)

View Item