Abstract
In this study, broad-spectral-responsive photocatalysts O-doped g-C3N4/Red P (OCN/RP) heterojunctions were prepared by mechanical grinding at room temperature, which is a simple and green synthesis process. The OCN nanosheets are fixed on the red P particles to form intimate I-type heterojunctions. The OCN/RP heterojunctions show extended excitation wavelength to 700 nm and enhanced photocatalytic activity against organic pollutant malachite green (MG). The enhancement benefits from the migration of photogenerated e− from OCN to RP, which facilitates effective charge separation at the interface between OCN and RP. ‧O2−, and ‧OH are proved to be the main active substances of MG photo-degradation on OCN/RP. This experiment provides a general strategy for the preparation of non-metal photocatalysts with broad-spectral responsibility and improved catalytic activity.
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