Synthesis of C₃N₄/rGO Composites by Low Temperature and Low Pressure Heat Treatment and Their Photocatalytic Properties

Reduced graphene oxide/carbon nitride (rGO/C₃N₄) nanocomposites were prepared through a low-temperature and low-pressure sintering method using a mixture of GO and C₃N₄ powders. The degradation performance of methylene blue (MB) of composites with different raw material ratios was studied under simulated solar irradiation conditions. Results indicated that GO was rapidly reduced during heat treatment and bonded well with C₃N₄. The C₃N₄ grains were also significantly refined. Compared with single-phase C₃N₄, the addition of GO greatly improved its photocatalytic efficiency and effectively suppressed the recombination of electron hole pairs. The samples exhibited good photocatalytic performance under simulated sunlight irradiation. Within 15 min, MB could be rapidly degraded by the C₃N₄/20% rGO composite .