Journal
MICRO & NANO LETTERS
Volume 9, Issue 2, Pages 65-68Publisher
INST ENGINEERING TECHNOLOGY-IET
DOI: 10.1049/mnl.2013.0546
Keywords
bismuth compounds; catalysis; nanofabrication; nanoparticles; photochemistry; red shift; titanium compounds; 3D hierarchical heterostructure; enhanced visible photocatalytic activity; liquid phase method; nanostructure; titania nanoparticles; flower-like microsphere surface; UV-vis diffuse reflectance spectra; enhanced optical absorption; visible light region; red-shift phenomenon; composite photocatalytic activity; titania loading content; Xe lamp light irradiation; tetrabutyl titanate; Rhodamine B decomposition; improved light harvesting ability; efficient separation; photogenerated electron pair; photogenerated hole pair; improved photocatalytic performance; power 500 W; TiO(2)a'Bi2WO6
Funding
- National Natural Science Foundation of China [51202136]
- Academic Backbone Cultivation Program of Shaanxi University of Science Technology [XSGP201202]
- Postgraduate Innovation Fund of Shaanxi University of Science and Technology
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A three-dimensional TiO2/Bi2WO6 hierarchical heterostructure was successfully prepared by a simple and practical liquid phase method. The as-synthesised nanostructure consisted of TiO2 nanoparticles growing on the surface of flower-like Bi2WO6 microspheres. The UV-vis diffuse reflectance spectra indicated that the TiO2/Bi2WO6 composites have a significantly enhanced optical absorption in the visible light region and red-shift phenomenon compared with that of pure Bi2WO6 microspheres. The photocatalytic activity of the TiO2/Bi2WO6 composites increases first and then decreases with increasing loading content of TiO2 under 500 W Xe lamp light irradiation. The composite coated with 3 ml content tetrabutyl titanate showed the highest photocatalytic activity compared with that of the other samples in the decomposition of Rhodamine B in water which is a typical model pollutant. The improved light harvesting ability and efficient separation of photo-generated electron and hole pairs could be responsible for the improved photocatalytic performance.
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