Öztürk, Abdullah
Eskişehir Technical University Journal of Science and Technology B-Theoritical Sciences


TiO2-Al2O3 binary mixed oxide surfaces for photocatalytic NOx abatement
Soylu, Asli Melike; Polat, Meryem; Altunöz Erdoğan, Deniz; Say, Zafer; Yildirim, Cansu; Birer, Ozgur; Ozensoy, Emrah (2014-11-01)
TiO2-Al2O3 binary oxide surfaces were utilized in order to develop an alternative photocatalytic NOx abatement approach, where TiO2 sites were used for ambient photocatalytic oxidation of NO with O-2 and alumina sites were exploited for NOx storage. Chemical, crystallographic and electronic structure of the TiO2-Al2O3 binary oxide surfaces were characterized (via BET surface area measurements, XRD, Raman spectroscopy and DR-UV-Vis Spectroscopy) as a function of the TiO2 loading in the mixture as well as the...
PEO - A new hydrate inhibitor polymer
Karaaslan, U; Parlaktuna, Mahmut (2002-11-01)
The hydrate inhibition potential of four different polymers has been tested in a high-pressure apparatus at high pressures and low temperatures. Aqueous polymer solutions were prepared at 1 wt % concentration. Methane (99.5% purity) was used as hydrate former gas. Hydrate formation rates of the tests were calculated to decide the best inhibitors. A known hydrate inhibitor, poly(N-vinylpyrrolidone) (PVP) and a water-soluble thermoplastic polymer TEO) were determined the best kinetic inhibitors among them.
TL and OSL studies on gallium sulfide (GaS) single crystals
Isik, M.; YÜKSEL, MEHMET; TOPAKSU, MUSTAFA; Hasanlı, Nızamı (Elsevier BV, 2020-09-01)
Gallium sulfide (GaS) single crystals were investigated using thermoluminescence (TL) and optically stimulated luminescence (OSL) measurements. TL experiments performed in the room temperature (RT)-450 °C range presented a glow curve consisting in six single discrete peaks. Analyses of TL glow curve by computerized glow curve deconvolution method showed that the trapping centers responsible for peaks are located at 0.98, 1.09, 1.15, 1.76, 1.87 and 1.90 eV. The order of kinetics found between 1 and 2 indicat...
TFA catalyzed sequential amination/annulation/aromatization reaction of 2-propynyl-1.3-dicarbonyl compounds with amines: A new one-pot approach to functionalized pyrroles
Demir, Ayhan Sıtkı; Aybey, Asuman; Kayalar, Metin (ARKAT USA, Inc., 2005-10-9)
Highly flexible and efficient syntheses of 1,2,3,5-substituted pyrroles starting from 2-propynyl1,3-dicarbonyl compounds and amines are presented. TFA catalyzed formation of the pyrroles is suggested to proceed through sequential amination of the carbonyl compounds followed by regioselective 5-exo-dig cyclization of the enaminone intermediate and aromatization.
FEM solution to natural convection flow of a micropolar nanofluid in the presence of a magnetic field
TÜRK, ÖNDER; Tezer, Münevver (2017-03-01)
The two-dimensional, laminar, unsteady natural convection flow in a square enclosure filled with aluminum oxide ()-water nanofluid under the influence of a magnetic field, is considered numerically. The nanofluid is considered as Newtonian and incompressible, the nanoparticles and water are assumed to be in thermal equilibrium. The mathematical modelling results in a coupled nonlinear system of partial differential equations. The equations are solved using finite element method (FEM) in space, whereas, the ...
Citation Formats
N. ERDOĞAN, J. PARK, and A. Öztürk, “TiO2 FILMS WITH VARIOUS CRYSTAL STRUCTURES FOR SINGLE AND BILAYER PHOTOANODES OF DYE-SENSITIZED SOLAR CELLS,” Eskişehir Technical University Journal of Science and Technology B-Theoritical Sciences, pp. 235–242, 2018, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/69465.