Enhanced Photocatalytic Performance of Luminescent g-C3N4 Photocatalyst in Darkroom

Graphitic-C 3 N 4 (g-C 3 N 4 ), a low-cost visible-light-driven photocatalyst, was used for the photocatalytic oxidation of aqueous methylene blue (MB) in the dark with Sr 4 Al 14 O 25 :(Eu,Dy) assistance. The Sr 4 Al 14 O 25 :(Eu,Dy)/g-C 3 N 4 photocatalysts were fabricated through the ultrasonic dispersion method. The commercial Sr 4 Al 14 O 25 :(Eu,Dy) phosphor was used as a long afterglow supplier for exciting g-C 3 N 4 in the dark. The results demonstrated that the metal-free g-C 3 N 4 photocatalyst could use the eye-visible long afterglow to photocatalytically decompose MB dyes in the dark. This work may expand the appealing application of g-C 3 N 4 for the environmental cleanup.