Three-dimensional Assembly of Carbon Nitride Tubes as Nanoreactors for Enhanced Photocatalytic Hydrogen Production
The three-dimensional character of carbon nitride could endow it with larger specific surface area and more catalytic active sites, which is also beneficial for the transfer of charge and mass to prompt photocatalytic hydrogen production reactions. Herein, we reported the direct assembly of a three-dimensional structured carbon nitride from thermal polymerization of 3-amino-1,2,4-triazole (AT) and melamine molecules. The 3D C3N4 consisted of a one-dimensional thick tube, with numbers thin tubes grown uniformly on its surface. It was noted that the assembly was decorated by triazole ring groups that generated a special nitrogen-rich structure further broadening its visible-light response range. Furthermore, nitrogen-rich carbon nitride had large surface area of 71 m2 g-1 leading to the significant promoting in catalytic active sites. Thus, photocatalytic hydrogen production rate reached 7.1 mmol/g/h, 11.2 times higher than that of bulk C3N4. This work may provide a new strategy to controllably synthesize three-dimensional carbon nitride assembly for photocatalytic application.