High temperature stability and photocatalytic activity of nanocrystalline anatase powders with Zr and Si co-dopants. Ilkhechi, N. N. & Kaleji, B. K. Journal of Sol-Gel Science and Technology, 69(2):351–356, February, 2014. WOS:000330975000015
doi  abstract   bibtex   
TiO2 nanopowders doped by Si and Zr were prepared by sol-gel method. The effects of Si and Zr doping on the structural, optical, and photo-catalytic properties of titania nanopowders have been studied by X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and UV-Vis absorption spectroscopy. XRD results suggest that adding impurities has a significant effect on anatase phase stability, crystallinity, and particle size of TiO2. Titania rutile phase formation in ternary system (Ti-Si-Zr) was inhibited by Zr4+ and Si4+ co-doped TiO2 in high temperatures (500-900 A degrees C) and 36 mol% anatase composition is retained even after calcination at 1,000 A degrees C. The photocatalyst activity was evaluated by photocatalytic degradation kinetics of aqueous methylen orange under visible radiation. The results show that the photocatalytic activity of the 20 %Si and 15 %Zr co-doped TiO2 nanopowders have a larger degradation efficiency than pure TiO2 under visible light.
@article{ilkhechi_high_2014,
	title = {High temperature stability and photocatalytic activity of nanocrystalline anatase powders with {Zr} and {Si} co-dopants},
	volume = {69},
	issn = {0928-0707},
	doi = {10.1007/s10971-013-3224-1},
	abstract = {TiO2 nanopowders doped by Si and Zr were prepared by sol-gel method. The effects of Si and Zr doping on the structural, optical, and photo-catalytic properties of titania nanopowders have been studied by X-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and UV-Vis absorption spectroscopy. XRD results suggest that adding impurities has a significant effect on anatase phase stability, crystallinity, and particle size of TiO2. Titania rutile phase formation in ternary system (Ti-Si-Zr) was inhibited by Zr4+ and Si4+ co-doped TiO2 in high temperatures (500-900 A degrees C) and 36 mol\% anatase composition is retained even after calcination at 1,000 A degrees C. The photocatalyst activity was evaluated by photocatalytic degradation kinetics of aqueous methylen orange under visible radiation. The results show that the photocatalytic activity of the 20 \%Si and 15 \%Zr co-doped TiO2 nanopowders have a larger degradation efficiency than pure TiO2 under visible light.},
	language = {English},
	number = {2},
	journal = {Journal of Sol-Gel Science and Technology},
	author = {Ilkhechi, Nasrollah Najibi and Kaleji, Behzad Koozegar},
	month = feb,
	year = {2014},
	note = {WOS:000330975000015},
	keywords = {Si/Zr dopant, Sol-gel, Titania nanopowders, crystal-structure, degradation, destruction, generation, mixed oxides, photocatalytic activity, rutile transformation, thin-films, tio2 photocatalyst, titania, visible-light irradiation},
	pages = {351--356},
}

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