Enhancing the photocatalytic activity of nanocrystalline TiO{sub 2} by co-doping with fluorine and yttrium

Journal Article · Tue Jul 01 04:00:00 EDT 2014 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2014.04.010· OSTI ID:22348667

Zhang, Huarong ^[1]; Miao, Guashuai; Ma, Xingping; Wang, Bei ^[2]; Zheng, Haiwu ^[1]

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1. Key Laboratory of Photovoltaic Materials of Henan Province, Henan University, Kaifeng 475001 (China)
2. Institute of Microsystemic Physics and School of Physics and Electronics, Henan University, Kaifeng 475001 (China)

Highlights: • (F, Y)-codoped TiO{sub 2} nanoparticles were prepared by a simple sol–gel method. • The highest photocatalytic activity (15 times of that over the pure TiO{sub 2}) was exhibited in the codoped TiO{sub 2} with 0.05% Y doping level. • The Y doping induced oxygen vancancies played a duel role on the photocatalyic activity of the codoped TiO{sub 2}. • The photocatalytic reactive oxygen species are critical to the photocatalytic degradation processes. - Abstract: Fluorine and yttrium codoped TiO{sub 2} nanoparticles were prepared using a simple sol–gel method. The products were characterized with various spectroscopic and analytical techniques to determine their structural, morphological, optical absorption and photocatalytic properties. The results reveal that neither F nor Y doping causes obvious absorption edge shift in TiO{sub 2}. Photoluminescence (PL) emission spectra present that the PL signal is enhanced, suggesting a decrease of photo-generated charge carrier separation efficiency, after the F or Y doping. The synergistic action by the F and Y doping leads to the highest photocatalytic activity for the degradation of methylene blue solution in the 0.05% (F, Y)-codoped sample (15 times of that over the pure TiO{sub 2}). With the increase of Y doping level, the photocatalytic performance in the codoped samples increases firstly and then decreases. The photocatalytic activity variations after the F and Y doping were interpreted by the formation of photocatalytic reactive oxygen species induced by the dopings.

• OSTI ID: 22348667
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 55; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ABSORPTION
CHARGE CARRIERS
CRYSTALS
EFFICIENCY
EMISSION SPECTRA
FLUORINE
METHYLENE BLUE
NANOPARTICLES
NANOSTRUCTURES
OXYGEN
PHOTOCATALYSIS
PHOTOLUMINESCENCE
SEMICONDUCTOR MATERIALS
SOL-GEL PROCESS
SOLUTIONS
TITANIUM OXIDES
X-RAY DIFFRACTION
YTTRIUM