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Enhanced visible light photocatalytic activity of ZnO doped with down-conversion NaSrBO3:Tb(3+) phosphors.
- Source :
-
Dalton transactions (Cambridge, England : 2003) [Dalton Trans] 2015 Jan 07; Vol. 44 (1), pp. 97-103. - Publication Year :
- 2015
-
Abstract
- ZnO-NaSrBO3:Tb(3+) (ZNT) composites were successfully synthesized via microwave-assisted reaction of the ZnO precursor with a NaSrBO3:Tb(3+) suspension using a microwave synthesis system. The morphology, structure and photocatalytic performance in the degradation of methylene blue (MB) were characterized by scanning electron microscopy, transmission electron microscopy, X-ray diffraction, UV-vis absorption spectroscopy, fluorescence spectrophotometry and electrochemical impedance spectroscopy, respectively. The results show that the ZNT composites exhibit enhanced photocatalytic activity in the degradation of MB with a maximum degradation rate of 97% under visible light irradiation compared with pure ZnO (12%), which is ascribed to the increased light absorption and the reduction of photoelectron-hole pair recombination in ZnO with the introduction of NaSrBO3:Tb(3+), as well as the light down-converting effect of NaSrBO3:Tb(3+), which facilitates the self-sensitized degradation of MB.
Details
- Language :
- English
- ISSN :
- 1477-9234
- Volume :
- 44
- Issue :
- 1
- Database :
- MEDLINE
- Journal :
- Dalton transactions (Cambridge, England : 2003)
- Publication Type :
- Academic Journal
- Accession number :
- 25366251
- Full Text :
- https://doi.org/10.1039/c4dt01252f