TiO{sub 2} nanobelts photocatalysts decorated with Bi{sub 2}WO{sub 6} nanocrystals: Preparation and enhanced photocatalytic activity

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

DOI:https://doi.org/10.1016/J.MATERRESBULL.2014.04.001· OSTI ID:22348677

Li, Yang ^[1]; Wu, Wenjian ^[1]; Wu, Mingzai ^[1]; Dai, Peng; Zhang, Lili; Sun, Zhaoqi; Li, Guang; Liu, Xiansong ^[1]; Chen, Xiaoshuang ^[2]; Zheng, Xiuwen ^[3]

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1. School of Physics and Materials Science, Anhui University, Hefei 230039 (China)
2. Shanghai Institute of Technical Physics of the Chinese Academy of Sciences, Shanghai 200083 (China)
3. School of Chemistry and Chemical Engineering, Linyi University, Linyi 276000 (China)

Highlights: • TiO{sub 2} nanobelts decorated with Bi{sub 2}WO{sub 6} nanocrystals have been prepared. • The introduction of Bi{sub 2}WO{sub 6} nanocrystals can induce red-shift of absorption edge. • The Bi{sub 2}WO{sub 6}/TiO{sub 2} composites show higher photocatalytic activity than TiO{sub 2} nanobelts. • The Bi{sub 2}WO{sub 6}/TiO{sub 2} composites have long-time recyclable ability of photodegradation. - Abstract: In this paper, the controllable preparation of one-dimensional TiO{sub 2} nanobelts decorated with Bi{sub 2}WO{sub 6} nanocrystals based on Ti foils was reported using two-step hydrothermal treatment method. X-ray photoelectron spectroscopy measurement results exhibited the binding energy changes of Ti and O elements, implying the strong adhesion of Bi{sub 2}WO{sub 6} nanocrystals onto the surface of TiO{sub 2} nanobelts. The ultraviolet–visible (UV–vis) absorption spectra showed that the introduction of Bi{sub 2}WO{sub 6} nanocrystals could induce the red-shift of absorption edge and exhibited a broad absorption band in the visible region, which extended the scope of absorption spectrum and help to improve the photocatalytic degradation efficiency. The photocatalytic experiment results revealed that Bi{sub 2}WO{sub 6}/TiO{sub 2} composites possess higher photocatalytic activities toward methyl orange than pure TiO{sub 2} nanobelts. The degradation efficiency of 90% after 5 cycles indicated that the as-prepared composite photocatalysts exhibited excellent long-time recyclable ability for the degradation of contaminants.

• OSTI ID: 22348677
• 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
77 NANOSCIENCE AND NANOTECHNOLOGY
ABSORPTION
ABSORPTION SPECTRA
ADHESION
BINDING ENERGY
BISMUTH TUNGSTATES
EFFICIENCY
METHYL ORANGE
NANOSTRUCTURES
PHOTOCATALYSIS
TITANIUM OXIDES
X-RAY PHOTOELECTRON SPECTROSCOPY