INFLUENCE OF SN ADDITION ON THE STRUCTURAL, MORPHOLOGICAL, OPTICAL, ANTI- OXIDANT PROPERTIES OF TITANIUM DIOXIDE PREPARED BY SPRAY PYROLYSIS TECHNIQUE
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Titanium dioxide TiO2 is famous materials that have turned a well-organized photocatalyst for environmental sustainability. It is also known as solar driven catalysis, TiO2 is determined as the major promising way to alleviate environmental problem caused by the combustion of fossil fuels and to meet global demands for energy. Major effort has been included on TiO2 band gap changes to become a visible-light-activated photocatalysts of TiO2 because it can simply be excited by UV light irradiation owing to its large band gap. Alteration like metals and nonmetals doping has been proposed in the earlier decades. Tin doped Titanium dioxide (TiO2: Sn) thin films were deposited onto glass substrates by the spray pyrolysis method with the substrate temperature 450 _C. The structural, optical, photoluminescence (PL) properties and morphological studies were researched for the films deposited with various doping concentration (1, 3, 5 and 7 at. %) of zinc. The conclusion of X-ray diffraction (XRD) had displayed the presence of anatase peak with a strong orientation along (101) plane at 7 at. % of Zn-doped TiO2 film. Scanning electron microscopy (SEM) study showed the uniform distribution of grains with porous nature. Atomic force microscopy (AFM) observations indicated the tetragonal shape at 7 at. % of Sn-doped TiO2 with the particle size and reduced in surface roughness. The emission at 398 nm was observed at the 7 at. % of Sn-doped TiO2 thin film. The carrier concentration and Hall mobility was increased with doping. The antibacterial activity was highly yielded for the Sn-doped TiO2 thin films. Following that, no structural or surface chemical modification were appeared in the thin film utilized for the photocatalytic activity, even after five cycles, which denotes that the film’s release high photostability.
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