Interfacial oxygen vacancy layer of BCN–TiO2 heterostructures as an effective interfacial mediator can promotes the direct Z-scheme charge carrier transfer process and visible light photocatalytic activity for H2 evolution.
The visible light photocatalytic activity of an ultrathin Bi2O2(OH)xCl2−x solid solution with an exposed {001} facet was boosted by adjusting the concentrations of oxygen vacancy and OH in it.