Nanostructure-assisted charge transfer in α-FeO/g-CN heterojunctions for efficient and highly stable photoelectrochemical water splitting.

The development of semiconductor heterojunctions is a promising and yet challenging strategy to boost the performance in photoelectrochemical (PEC) water splitting. This paper describes the fabrication of a heterojunction photoanode by coupling α-FeO and g-CNvia aerosol-assisted chemical vapour deposition (AACVD) followed by spin coating and air annealing. Enhanced PEC performance and stability are observed for the α-FeO/g-CN heterojunction photoanode in comparison to pristine α-FeO and the reason is systematically discussed in this paper.