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Preparation and characterization of nanostructured TiO2 thin film codoped with nitrogen and vanadium on glass surface by sol-gel dip-coating method
,
Article
Research on Chemical Intermediates
;
Volume 41, Issue 10
,
October
,
2015
,
Pages 7349-7361
;
09226168 (ISSN)
; Sani, M. A. F
;
Sharif University of Technology
Kluwer Academic Publishers
2015
Abstract
To enhance hydrophilicity and photocatalytic activity, N-doped and N-V-codoped TiO2 films were coated on glass substrates by the sol-gel dip-coating method. The substrates were previously coated with SiO2 using the same method. The coated samples, after annealing at 450 °C for 30 min in air, were analyzed by an X-ray diffractometer, scanning electron microscope, Fourier transform infrared spectroscope, X-ray photoelectron spectroscope, and UV-visible spectroscope. The SiO2 /N-V-codoped TiO2 photocatalyst showed a narrower band gap (2.93 eV) compared to the SiO2 /N-doped. Degradation tests, methyl orange under UV light and stearic acid...
Flash photo stimulation of human neural stem cells on graphene/TiO 2 heterojunction for differentiation into neurons
, Article Nanoscale ; Volume 5, Issue 21 , 2013 , Pages 10316-10326 ; 20403364 (ISSN) ; Ghaderi, E ; Sharif University of Technology
2013
Abstract
For the application of human neural stem cells (hNSCs) in neural regeneration and brain repair, it is necessary to stimulate hNSC differentiation towards neurons rather than glia. Due to the unique properties of graphene in stem cell differentiation, here we introduce reduced graphene oxide (rGO)/TiO2 heterojunction film as a biocompatible flash photo stimulator for effective differentiation of hNSCs into neurons. Using the stimulation, the number of cell nuclei on rGO/TiO2 increased by a factor of ∼1.5, while on GO/TiO2 and TiO2 it increased only ∼48 and 24%, respectively. Moreover, under optimum conditions of flash photo stimulation (10 mW cm-2 flash intensity and 15.0 mM ascorbic acid in...