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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...
Effects of tin valence on microstructure, optical, and electrical properties of ITO thin films prepared by sol–gel method
, Article Journal of Sol-Gel Science and Technology ; Volume 75, Issue 3 , September , 2015 , Pages 582-592 ; 09280707 (ISSN) ; Dolati, A ; Sharif University of Technology
Kluwer Academic Publishers
2015
Abstract
Abstract: This study aimed to understand the microstructural, optical, and electrical properties of tin-doped indium oxide (ITO) prepared with tetravalent and divalent tin salts. The influence of tin valence on the electrical, optical, structural, and morphological properties of the films were characterized by the mean of four-point probe, thermogravimetric analysis, differential thermal analysis (DTA), UV–Vis spectroscopy, X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), and X-ray photoelectron spectroscope. XRD results revealed formation of cubic bixbyite structure of In2 O3 with a small shift in major peak position toward lower angles with...
Plasma surface functionalization of boron nitride nano-sheets
, Article Diamond and Related Materials ; Volume 77 , 2017 , Pages 110-115 ; 09259635 (ISSN) ; Achour, A ; Solaymani, S ; Islam, M ; Vizireanu, S ; Arman, A ; Ahmadpourian, A ; Dinescu, G ; Sharif University of Technology
Elsevier Ltd
2017
Abstract
On silicon substrates, boron nitride nanosheets (BNNS) consisting of interconnected hexagonal boron nitride nano-layers were produced via chemical vapor deposition process at 1200 °C whose roughness's are at the micrometer- and nanometer-scale. The BNNS were functionalized in argon plasma admixed with ammonia or nitrogen or oxygen. The samples were characterized to investigate the surface chemistry and structural changes after plasma treatment using X-ray photoelectron spectroscope and Micro-Raman spectroscope techniques, respectively. While no significant changes in the surface features, upon plasma treatments of the BNNS, were noticed during SEM and TEM examination, the oxygen functional...