Synthesis and characterization of F-N-W-codoped TiO{sub 2} photocatalyst with enhanced visible light response

Journal Article · Sat Dec 15 00:00:00 EST 2012 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2012.09.006· OSTI ID:22215684

Shi, Xiaoliang ^[1]; Qin, Haibo; Yang, Xingyong ^[2]; Zhang, Qiaoxin ^[1]

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1. School of Mechanical and Electronic Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070 (China)
2. School of Materials Science and Engineering, Wuhan University of Technology, 122 Luoshi Road, Wuhan 430070 (China)

Graphical abstract: Display Omitted Highlights: ► Anatase F-N-W-codoped TiO{sub 2} was prepared by a sol–gel-hydrothermal method. ► Under visible illumination, carbon removal rate of RB reached 94% using F-7NW-TiO{sub 2}. ► F, N and W dopants narrowed band gap and lowed charge pairs recombination rate. ► There were W{sub x}Ti{sub 1−x}O{sub 2}, O-Ti-N and valence variation of W ions existing. -- Abstract: Anatase F-N-W-codoped TiO{sub 2} photocatalyst was successfully prepared by a method combining sol–gel with hydrothermal treatment. Effects of F, N and W ion dosage concentration on the crystallinity, morphology, grain size and chemical status of the photocatalyst were investigated. The results showed that the F-7NW-TiO{sub 2} photocatalyst composed of uniform ellipsoidal particles around 20 nm in length and 10 nm in width, and the photocatalyst displayed enhanced visible-light absorption and photocatalytic activities. Using the photocatalyst and under visible irradiation for 1.5 h, the decoloration percent of RB and carbon removal rate were about 98% and 94% respectively, which were much higher than that of commercial P25, TiO{sub 2}, N-W-TiO{sub 2} and F-TiO{sub 2}. The high visible-light photocatalytic activity of F-7NW-TiO{sub 2} might result from narrowing the band gap and lowing charge pairs recombination rate for the W{sub x}Ti{sub 1−x}O{sub 2}, O-Ti-N and valence variation of W ions existing.

• OSTI ID: 22215684
• Journal Information: Materials Research Bulletin, Vol. 47, Issue 12; Other Information: Copyright (c) 2012 Elsevier Science B.V., Amsterdam, The Netherlands, All rights reserved.; Country of input: International Atomic Energy Agency (IAEA); ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
DOPED MATERIALS
ELECTRON MICROSCOPY
GRAIN SIZE
HYDROTHERMAL SYNTHESIS
IRRADIATION
PHOTOCATALYSIS
SEMICONDUCTOR MATERIALS
TITANIUM OXIDES