TiO2 thin films using organic liquid materials prepared by Hot-Wire CVD method

Influence of annealing temperature on the photoluminescence property of ZnO thin film covered by TiO2 nanoparticles

“…However, here the (1 0 1) peak is weaker than the (2 0 0) peak. It is similar to the XRD pattern of TiO 2 thin film deposited by Iida et al at total gas pressure 266 Pa [12]. It is well-known that the variation of the diffraction peaks of TiO 2 thin films mainly depends on the deposition conditions, annealing treatment and substrates.…”

“…It means the deposited ZnO thin films are hexagonal wurtzite structures and have a preferential orientation along the c-axis perpendicular to the substrate surface. Besides the (0 0 2) peak, they also have a weak diffraction peak located at 48.31, which corresponds to the (2 0 0) diffraction peak of anatase-structured TiO 2 [12]. This indicates that the TiO 2 layer is composed of anatase-structured TiO 2 crystals.…”

Deposition of TiO2 Film on Duplex Stainless Steel Substrate Using the Cathodic Cage Plasma Technique

“…Anatase TiO 2 is considered one of the best photocatalysts with high activity and non-toxic properties 5 , furthermore, it exhibits high chemical reactivity and stability under UV illumination 2 , which leads to greater possibilities for practical application as antibacterial agents [2][3][4][5] , self-cleaning surfaces 7 , organic photo degradation 8,6 , and hydrogen generation by the splitting of water, termed solar-hydrogen 6,9,10 . In addition, depending of phase and preparation conditions, anatase TiO 2 has high durability, high refractive index (n = 2.3), high resistivity and dielectric constant 11 k, with values from 30 to 100, so it is suitable for applications in optical wave-guides 12 , antireflection coatings 13 , photochemical solar cells 14,15 and gas sensors 11,12 . Photons with energy equal or higher than the energy band gap (~3.2eV) are able to generate electron/hole pairs 7 and have energy high enough to initiate redox and oxidation reactions 16 .…”

“…These intermediate species induce the decomposition of various molecules such as those which are organic or microbes, which leads to the self-cleaning ability and anti-microbial applications of a TiO 2 surface 17 . In order to improve and expand upon the range of applications some modifications have been studied and several approaches have been proposed: First, to reduce the band gap of TiO 2 with the intention of improving the light absorption in the visible region, studies have been conducted involving doping with metallic and non-metallic impurities [4][5][6]18 Recent investigations have included the use of practical and economical substrates such as metallic materials 5,15,16,20 . The particular properties of metals, such as its conductivity, flexibility, mechanical robustness and capacity to be shaped easily can change the photocatalytic characteristics and expand the possibility for practical application 7,16 , such as self-cleaning surfaces, antibacterial agents, photo degradation of organics, use in the manufacture of components introduced in hospital equipment, utensils for food preparation and air conditioning 11,14 .…”

Preparation and characterization of ZnO–TiO2 films obtained by sol-gel method

“…Thin films of TiO 2 and ZnO can be deposited by a variety of physical and chemical technologies such as magnetron sputtering, CVD and electrochemical method [11][12][13]. The Sol-gel route is a wet-chemical deposition suitable for fabrication of thin films, ceramics, fibers and nanocomposites [14,15].…”