Journal
APPLIED SURFACE SCIENCE
Volume 256, Issue 23, Pages 7125-7130Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.apsusc.2010.05.038
Keywords
Ag loading and N doping; Phase transformation; TiO2 hollow nanorod arrays; Liquid phase deposition (LPD); Photocatalysis; Methylene blue (MB)
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Funding
- National Science Foundation of China
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The simultaneous Ag loaded and N-doped TiO2 hollow nanorod arrays with various contents of silver (Ag/N-THNAs) were successfully synthesized on glass substrates by one-pot liquid phase deposition (LPD) method using ZnO nanorod arrays as template. The catalysts were characterized by Raman spectrum, field-emission scanning electron microscopy (FESEM), high-resolution transmission electron microscope (HRTEM), ultraviolet-vis (UV-vis) absorption spectrum and X-ray photoelectron spectroscopy (XPS). The results suggest that AgNO3 additive in the precursor solutions not only can promote the anatase-to-rutile phase transition, but also influence the amount of N doping in the samples. The photocatalytic activity of all the samples was evaluated by photodegradation of methylene blue (MB) in aqueous solution. The sample exhibited the highest photocatalytic activity under UV light illumination when the AgNO3 concentration in the precursor solution was 0.03 M, due to Ag nanoparticles acting as electron sinks; When the AgNO3 concentration was 0.07 M, the sample performed best under visible light illumination, attributed to the synergetic effects of Ag loading, N doping, and the multiphase structure (anatase/rutile). (C) 2010 Elsevier B.V. All rights reserved.
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