In this work Gd/La@ZnO nanoflower photocatalyst was successfully synthesized by a co-precipitation method and applied for rhodamine B(Rh B)and tetracycline(TCN)degradation under direct sunlight irradiation.The doping ...In this work Gd/La@ZnO nanoflower photocatalyst was successfully synthesized by a co-precipitation method and applied for rhodamine B(Rh B)and tetracycline(TCN)degradation under direct sunlight irradiation.The doping of rare earth elements extends the optical absorption wavelength of ZnO from UV region(390 nm)to visible-light region(401 nm).In addition,the co-doped ZnO nanoflower exhibits a lower charge recombination efficiency which was confirmed by photoluminescence emission analysis.Moreover,the co-doped ZnO nanoflower exhibits the maximum degradation efficiency of 91%for Rh B and 74%for TCN under sunlight irradiation.The calculated synergistic index of co-doped ZnO is higher than that of the pure ZnO.Reactive radicals’production was confirmed by terephthalic acid(TA)and nitro-blue tetrazolium(NBT)tests.The holes and hydroxyl(·OH)radicals play the major role in degradation reaction and it was confirmed by scavenger’s test.Moreover,the recycling test confirms the stability of the photocatalyst.展开更多
基金Research Supporting Project(RefRSP-2021/160)King Saud University。
文摘In this work Gd/La@ZnO nanoflower photocatalyst was successfully synthesized by a co-precipitation method and applied for rhodamine B(Rh B)and tetracycline(TCN)degradation under direct sunlight irradiation.The doping of rare earth elements extends the optical absorption wavelength of ZnO from UV region(390 nm)to visible-light region(401 nm).In addition,the co-doped ZnO nanoflower exhibits a lower charge recombination efficiency which was confirmed by photoluminescence emission analysis.Moreover,the co-doped ZnO nanoflower exhibits the maximum degradation efficiency of 91%for Rh B and 74%for TCN under sunlight irradiation.The calculated synergistic index of co-doped ZnO is higher than that of the pure ZnO.Reactive radicals’production was confirmed by terephthalic acid(TA)and nitro-blue tetrazolium(NBT)tests.The holes and hydroxyl(·OH)radicals play the major role in degradation reaction and it was confirmed by scavenger’s test.Moreover,the recycling test confirms the stability of the photocatalyst.
