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SnO2 nanoparticles with different percentage of Al (5%, 15%, and25%) weresynthesized by sol-gel method. The structure and nature of nanoparticles aredetermined by of X-ray diffraction analysis. Also morphology of the samples isevaluated by SEM. Moreover, the optical properties of the samples areinvestigated with UV-Visible and FT-IR. The XRD patterns are indicated that allsamples and incorporation aluminum ions into the SnO2 lattice have tetragonalrutile structure. The crystalline size of nanoparticles is decreased withincreasing the Al percentage. The SEM results confirmed that the size ofnanoparticles decreases with increasing the Al percentage. Also, FT-IR andUV-Visible results showed that the optical band gap of nanoparticles increaseswith the increasing the Al percentage. Finally, we have used the EDX analysisto study the chemical composition of the products. Pure tin and oxygen havebeen observed. The doped samples showed the existence of Al atoms in thesamples of the crystal structure of SnO2.

Growth and Optical Properties Investigation of Pure and Al-doped SnO2 Nanostructures by Sol-Gel Method