The strategy of copper oxide control ammonia atmosphere constructs S-scheme g-C3N4 heterojunction photocatalyst for photocatalytic hydrogen evolution

Graphite carbon nitride (g-C3N4) is a promising candidate for photocatalytic hydrogen evolution, but only shows mediocre activity due to insufficient active sites and sluggish charge transfer. Herein, we assembled 1D/0D holey sulfur doped rectangular hollow g-C3N4 nanotubes (HSCNT)/CdS S-scheme heterojunction via the strategy of copper oxide control ammonia atmosphere and in-situ deposition method. Advanced characterization results suggested that copper oxide plays an important role in morphology regulation to increase the active site, and Sscheme heterojunction can efficiently promote charge separation through their specially coupled heterogeneous interface. As a result, HSCNT/CdS exhibited dramatically improved photocatalytic hydrogen production at 68- fold enhancement compared to bulk g-C3N4 (BCN). The integrated strategy may offer a unique example for the rational combination morphology regulation of carbon nitride and heterogeneous structure construction.