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Photocatalytic activity of TiO2-capped ZnO nanoparticles [electronic resource]
, Article Journal of Materials Science: Materials in Electronics ; 2011 , Vol. 23, Issue 2, P.361-369 ; Simchi, A. (Abdolreza) ; Nemati, Ziarat Ali ; Sharif University of Technology
Abstract
Using a combined hydrothermal and sol–gel route, TiO2-capped ZnO nanoparticles with an average size of 60 nm were prepared. The titania shell was amorphous with a thickness of ~10 nm. Formation of Zn2TiO4 phase at higher calcination temperature was noticed. Effects of Ti/Zn molar ratio and coating time on the thickness of TiO2 shell and the photoactivity of the particles for decolorization of Methylene Blue (MB) under UV lamp irradiation (3 mW/cm2) were investigated. The nanoparticles were characterized by X-ray diffraction, transmission electron microscopy, fourier-transform infrared spectrometry (FTIR), diffuse reflectance spectroscopy (DLS), and atomic absorption spectroscopy. Analysis of...
The Effect of Nonlinear Behavior of Soil on Inelastic Response of SDOF Structures
,
M.Sc. Thesis
Sharif University of Technology
;
Ghannad, Mohammad Ali
(Supervisor)
Abstract
In this research, the effect of nonlinear behavior of soil on the nonlinear responses of super-structure has been investigated. During the design process of practical buildings, engineers usually disregard the effect of soil-structure interaction. In some cases in which the effect of soil-structure interaction is considered, nonlinear behavior of soil usually is modeled through an equivalent linear method which is proposed by the most existing design codes. Past studies show that considering the effect of soil-structure interaction, could change the responses of super-structure in comparison with those whose base are fixed. In many of these studies, nonlinear behavior of beneath soil is...