Paper Title:
Anatase-Type Ti1-2xNbxAlxO2 Solid Solution/Silica (SiO2) Composite Nanoparticles: Synthesis, Phase Stability, and Photocatalytic Performance
  Abstract

Composite nanoparticles (anatase-type Ti1-2XNbXAlXO2 solid solution/SiO2) were directly synthesized from precursor solutions in the presence of urea under mild hydrothermal conditions at 180 °C for 5 h. The crystallite size of anatase was gradually decreased with increased silica content in the composite nanoparticles formed under weakly basic hydrothermal conditions via the hydrolysis of urea. The composite nanoparticles with composition Ti0.9Nb0.05Al0.05O2/SiO2 = 100/10 mol% showed good photocatalytic activity. The anatase-to-rutile phase transformation in the course of heating in air was retarded to maintain the anatase-type structure up to more than 1050 °C without a trace of rutile phase by the formation of composite nanoparticles (Ti0.90Nb0.05Al0.05O2/SiO2 = 100/20 mol%) with amorphous silica.

  Info
Periodical
Materials Science Forum (Volumes 654-656)
Main Theme
Edited by
Jian-Feng Nie and Allan Morton
Pages
2735-2738
DOI
10.4028/www.scientific.net/MSF.654-656.2735
Citation
M. Hirano, N. Kuno, "Anatase-Type Ti1-2xNbxAlxO2 Solid Solution/Silica (SiO2) Composite Nanoparticles: Synthesis, Phase Stability, and Photocatalytic Performance", Materials Science Forum, Vols. 654-656, pp. 2735-2738, 2010
Online since
June 2010
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$32.00
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