Oxygen-deficient titania (TiO2) nanoparticle photocatalysts were synthesized using a flame synthesis method. The degree of oxygen deficiency in the TiO2 particles could be changed by moving position quenching N2 gas ring with respect to reduce concentration flame. Photocatalytic property evaluation revealed that produced had better photocatalytic performance visible light region (wavelength λ >...

The potential of nanofluids for the improvement of heat transfer coefficient in various heat exchangeequipment has been considered and studied as a major application during recent decades. In this research,heat transfer coefficient of ZnO, TiO2 and ZnO/TiO2 nanofluids in a shell and tube heat exchanger has beenstudied experimentally. ZnO nanoparticle was synthesized through pre...

Titanium dioxide (TiO2) nanoparticles, with an average size of about 45 nm, were encapsulated by polystyrene using in situ nitroxide mediated radical polymerization   in the presence of 3-aminopropyl triethoxy silane (APTES) as a coupling agent and 2, 2, 6, 6-tetramethylpiperidinyl-1-oxy  as a initiator. First, the initiator for NMRP was covalently bonded onto the surface of Titanium dioxide na...

in this study, we investigated the effect of using large tio2 nanoparticles in the matrix of small nanoparticles to improve the performance of dye-sensitized solar cells (dsscs), as light scatter to increase the light harvesting. the mixed powder was deposited by electrophoretic deposition (epd) on fto (f-sno2 coated glass). it is shown that adding small quantity of larger nanoparticles can enh...

In the current research, atmosphere effects on photoinduced electron relaxations of undecorated TiO2 and Ag-decorated (Ag/TiO2) were carefully studied by means in situ photoconductance diffuse reflection measurements. pure N2 atmosphere, results showed that relaxation mainly occurs through transfer to residual O2, Ag nanoparticles form a fast pathway. It was seen apparent activation energy O2 g...

tio2 thin films and ag/tio2 nanoparticles were prepared by cvd and plasma bombardment method. xrd results showed the presence of ag nanoparticles in tio2 matrix. sem image confirmed formation of ag nanoparticles. xps analysis was utilized to study the chemical state of the ag/tio2 nanostructure. statistical surface analysis revealed that since there is a linear relation between logarithmic diag...

The titanium oxide (TiO2) nanoparticles were prepared using the sol-gel technique. calcination temperature (650, 850) has produced different TiO2 structures (anatase and rutile), effect of particles was studied. on structural properties nanomaterial. Furthermore, at room-temperature casting process used to create a PVA/TiO2 nanocomposite with phases. showed results X-ray diffraction (XRD) that ...