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