fig1
Figure 1. (A) Advantages of 2D-HP C3N4 materials in photocatalysis; (B) Schematic structure of C3N4 photocatalyst; (C and D) Photograph of C3N4 powder and the low density; (E) TEM image of boron-doped 2D-HP C3N4; (F) Photographs for the aqueous dispersion of the different C3N4 samples; (G) Images of water droplets on the C3N4 thin films; (H) SEM and (I) TEM images of 2D porous C3N4; (J) Photocatalytic H2 evolution rate over various photocatalysts. 2D-HP: Two-dimensional hierarchically porous; TEM: transmission electron microscopy; SEM: scanning electron microscope.
