Mesoporous P-C3N4 nanosheets were prepared by template-free strategy.
Zn0.2Cd0.8S/P-C3N4 catalysts were fabricated by ultrasound-assisted growth route.
Zn0.2Cd0.8S/P-C3N4 shows superior activities in comparison with single component.
The catalytic activities were mainly affected by the charge carrier separation.