Persistent UV phosphors for application in photo catalysis

Ce 3+-doped strontium alumino-silicates (Sr 1− v M v ) 1+ y Al 2− x B x Si y O 4+3 y (M:Ca,Mg,Ba) were prepared using solid-state reactions at 1200 °C for 2 h in a weakly reductive atmosphere of 5% H 2-95% N 2. The X-ray diffraction measurements revealed that the products have a good crystallization, and the resultant phosphors show broad emissions centered at 400 nm, with a long-persistence of several minutes ( k = 0.02–0.10 s −1). These luminescent properties are considered good enough for novel applications in photo catalysis, which will be the objective of further developments.