Fabrication of TiO on porous g-CN by ALD for improved solar-driven hydrogen evolution.

Porous graphitic carbon nitride (P-g-CN) thin sheets were fabricated by a one-step calcination of a mixture of urea, melamine, and ammonia chloride at 550 °C. P-g-CN showed 48% higher photocatalytic H production from methanol aqueous solution than conventional urea-derived graphitic carbon nitride (g-CN) because the existence of numerous pores reduces the recombination rate of charge carriers. In order to further enhance the photocatalytic activity, TiO was uniformly deposited on P-g-CN by 60-300 cycles of atomic layer deposition (ALD) to form the TiO@P-g-CN composite.