This paper highlighted in preparation and their properties of Y3+ doped barium titanate (BaTiO3) nanocrystals using inverse miniemulsion. The yttrium (Y) element dopant as the earlier utilized rare earth was used for barium titanate (BaTiO3) modification. The cubic structure of Y3+ doped BaTiO3 nanocrystals were successfully incubated in stable droplets of inverse miniemulsion under the solvent-thermal treatment condition. The suitable Y3+ doping amount in nanocrystals had positively attributed to reduce the value of bandgap (Eg ), to prolong the fluorescence lifetime, and to improve the photoelectric properties. The photodegradation mechanism and the schematic diagram of fluorescence emission and radical production were suggested for explanation the relation between photoelectric characteristics and photocatalytic properties. The selected 1.0% Y3+ doped nanocrystal provided an excellent photocatalysis candidate for organic compound photodegradation.
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