钒掺杂氧化铋的转晶过程及可见光催化活性

he doping of bismuth oxide with vanadium yielded a series of photocatalysts with visible light responsive ability, including bismuth subcarbonate (Bi2O2CO3), monoclinic bismuth vanadate (BiVO4), bismuth oxides, cubic bismuth vanadate (Bi12.38V0.62O20.12) and their co-crystalline under the different anneal temperatures. It is suggested that vanadium doping in the lattice of bismuth oxide results in the crystalline transformation. Among them, the mixture of cubic bismuth oxide and bismuth vanadate presented the highest degradation efficiency (98.5%) for 4-chlorophenol, a widespread environmental pollutant, under visible light and sunlight irradiation. The degradation mechanism was ascribed to the photocatalytic reduction by the photo-generated electron.