Molecular routes syntheses of graphite-like C–N compounds with various N/C ratios in high pressure and temperature

抄録

Graphite-like carbon nitride inorganic compounds were synthesized from molecular 1,2,4-triazole C₂N₃H₃ in high pressure and temperature conditions using a DIA-type multianvil large press. It was found that the N/C content ratio of the carbon nitrides can be systematically controlled by changing the heating temperature at 5 GPa. The substitution of nitrogen for carbon in graphene layers results in the low crystallinity of the synthesized C–N compounds. It should be noted that the c-axis which is equivalent of the distance between two graphene layers, decreases monotonously with increasing N/C content ratio. This is attributed to both of the smaller atomic size of nitrogen than that of carbon and Van der Waals attraction between C–N graphene layers because of the different electronegativity between nitrogen and carbon.