The study of specifications of nano Ti̇O2 doped si̇lver

There are many studies for enviromental applications due to the high chemical activities of phototocatalysts. Nano sized TiO2 is one of the most widely used photocatalyst of the working photocatalysts. The nano-sized TiO2 has found extensive applications for removing organic pollutants from air and water and also in hydrogen production from ionisation of water.The use of nano-sized TiO2 is popular because of its low cost, low toxicity, high chemical and thermal stability. But, one of the critical limitations of TiO2 as photocatalyst is its poor response to visible light.In the most of studies, TiO2 is used to enhance its activity in the visible light region such as adding transition metal, metal ion loading, cationic and anionic doping and sensitisation, in the recent years.Surface modifiers are improving photocatalytic activities of TiO2 by effecting in two ways: 1- By preventing recombine of loaded particles 2- By increasing the used wavelength range To improve fotocatlytic activity metals such as Pt, Au, Ag, Zn, Cu, Mn, Mg, Fe, Sn should be doped on TiO2.The Ag metal out of doping metals is used to disinfect both air and water due to its good disinfection property.The main purpose of this study is doping of nano sized silver particules on semiconductor TiO2 that is one of the semiconducter oxide used mostly in the studies on developing tecnologies with drastic changes in the field of environmental purification and energie production. The use of Nano sized silver particules inceases day by day especially in the area of medical andcosmetic sector and in biosensor applications due to their various properties. The silver is added into TiO2 sol at different concentrations, and surfactants is used together with reducing agents polyethyleneglycole, ascorbic acid, sodyum bor hydride and hydrazine and the change of the structure is investigated.The TiO2 photocatalyst was synthesized by the hydrotermal route. The morphological surface structure and the structure of the photocatalyst were evaluated by scanning electron microscopy (SEM), Brunauer-Emmett-Teller (BET) surface area measurements, Fourier transform infrared spectroscopy (FT-IR), TEM and x-ray diffraction (XRD).SEM results show the synthesized particles have spherical morphology.XRD studies indicate the form of the synthesized powder by the thermal route at 180°C, as anatase TiO2 and elemental silver form.The EDS spectrum confirm that the anatase TiO2 and elemental Ag are in the structure of the powder. The photocatalytic, antifungal, antibacterial and conductivity properties of the obtained nano-sized powders were studied.The indigo blue dye, which is used widely in the textie industry, is used as model molecule for photocatalytic degradation and aquarium system was designed.Photocatalytic performance of the coated ceramic beads was investigated under long wavelength uv ligth (365 nm). Dipping technique was used to coat the surfaces of the ceramic beads . The ceramic beads coated with Ag-doped TiO2 indicate better photocatalytic performance under UV light against the indigo blue dye comparing to the ceramic beads that coated with undoped TiO2.The antimicrobial activity of powder was investigated against both Escherichia coli ATCC 25922 and Staphylococcus aureus ATCC 25923 bacteria and MIC diffusion method was performed.To investigate the antifungal activity of powders Aspergergilus parasiticus NRRL 465 fungus was used.For conductivity , they are measured in AC and DC electricity. By conductivity measures , the best conductive powder has been identified.