Structural, optical and photoconductivity of Sn and Mn doped TiO sub(2) nanoparticles

The Sn and Mn doped TiO sub(2) nanostructures were synthesized by sol-gel method. The Sn doped TiO sub(2) nano-particles exhibit anatase-rutile mixed phase, while the Mn doped TiO sub(2) nanoparticles exhibit anatase phase. The Sn and Mn doped TiO sub(2) nanoparticles are spherical in shape and show tensile strain in the host lattice. The optical band gap for these nanoparticles indicates the red shift. It has been observed that the PL intensity decreases after doping of Sn in TiO sub(2) but it starts increasing with increase in Sn content. The pure TiO sub(2) exhibits all the possible emission bands while Sn and Mn doped TiO sub(2) nanoparticles show blue-green emission bands. The doping behavior of Sn and Mn on crystal phase, particle size, XRD patterns, absorption spectra, photoluminescence and photoconductivity of TiO sub(2) nanoparticles have been described.