A hybridized heterojunction structure between TiO2 nanorods and exfoliated graphitic carbon-nitride sheets for hydrogen evolution under visible light†
Graphitic carbon nitride sheets (GCNS) were obtained through the direct ultrasonic exfoliation of bulk GCN in pure water, and hybridized heterojunction structures between the TiO2 nanorods and GCNS were fabricated by a facile production method. The introduction of GCNS can significantly increase the reactive sites for photocatalysis, form an efficient contact with TiO2 nanorods, and expand the visible-light-responsive region. The photocatalytic activities of TiO2 nanorods/GCNS under visible-light irradiation were about 3- and 10-times those of bulk GCN and TiO2 nanorods, respectively. The excellent photocatalytic performance of the TiO2 nanorods/GCNS was mainly attributed to the high separation and migration rate of electron–hole pairs and the efficient utilization of visible light.