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Enhanced Photocatalytic Degradation of C.I. Basic Violet 2 Using TiO 2 –SiO 2 Composite Nanoparticles

Content Provider	Scilit
Author	Mahyar, Ali Behnajady, Mohammad Ali Modirshahla, Naser
Copyright Year	2011
Description	Journal: Photochemistry and Photobiology In this report, TiO(2) -SiO(2) composite nanoparticles were prepared by the thermal hydrolysis method using titanium tetrachloride and tetraethylorthosilicate as TiO(2) and SiO(2) precursors, respectively. The prepared nanoparticles were characterized by X-ray powder diffraction (XRD), Fourier-transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), nitrogen adsorption/desorption and UV-Vis diffuse reflectance spectroscopy (DRS). The results indicated that, in comparison with pure TiO(2), TiO(2)-SiO(2) composite nanoparticles had a higher thermal stability, which prevents phase transformation from anatase to rutile. In addition, the TiO(2)-SiO(2) nanoparticles had a higher specific surface area, larger pore volume, greater band gap energy and smaller crystallite size. Thus, the surface area of TiO(2)-40% SiO(2) composite nanoparticles was about 17 times higher than that of pure TiO(2) nanoparticles. The photocatalytic activity of TiO(2)-SiO(2) composite nanoparticles in the photodegradation of C.I. Basic Violet 2 was investigated. The photodegradation rate of Basic Violet 2 using TiO(2)-40% SiO(2) nanoparticles calcined at 600°C was much faster than that using pure TiO(2) and Degussa P25 TiO(2) by 10.9 and 4.3 times, respectively. The higher photoactivity of the TiO(2)-SiO(2) composite nanoparticles was attributed to their higher surface area, larger pore volume, greater band-gap energy and smaller crystallite size compared with pure TiO(2).
Related Links	http://onlinelibrary.wiley.com/doi/10.1111/j.1751-1097.2011.00930.x/pdf
Ending Page	801
Page Count	7
Starting Page	795
e-ISSN	17511097
DOI	10.1111/j.1751-1097.2011.00930.x
Journal	Photochemistry and Photobiology
Issue Number	4
Volume Number	87
Language	English
Publisher	Wiley-Blackwell
Publisher Date	2011-05-03
Access Restriction	Open
Subject Keyword	Journal: Photochemistry and Photobiology Characterization and Testing of Materials Photocatalytic Degradation Sio2 Composite Nanoparticles Thermal Stability
Content Type	Text
Resource Type	Article

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