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Revista de la Sociedad Química del Perú

Print version ISSN 1810-634X


CABRERA, Julieta et al. Mesoporous 1D TiO2 nanostructures obtained by the hydrothermal method. Rev. Soc. Quím. Perú [online]. 2014, vol.80, n.4, pp.262-269. ISSN 1810-634X.

Mesoporous one dimensional nanostructures (1D) such as nanotubes/nanorods of TiO2 were synthesized by alkaline hydrothermal treatment of TiO2 nanoparticles obtained by Sol Gel process (SG-TiO2). The electronic microscopy images revealed the nanotubes formation of approximately 8 nm in diameter and more than around 400 nm long after hydrothermal treatment of 18 h and 24 h. These tube-like structures were maintained after acid treatment but after annealing at 400 °C during 2 hours these turn into rod-like structures of crystalline TiO2 corresponding to anatase phase as revealed the diffraction patterns obtained by X-Ray Diffraction (XRD). The conversion of nanoparticles into nanotubes and afterward into rodlike shape was also confirmed by the variations in the BET surface area from 201, 269 and 97 m2/g around, respectively. The adsorption-desorption isotherms also revealed hysteresis loop typical of mesoporous materials. These qualities are attractive to use these materials for the treatment of pollutants in water, for example.

Keywords : BET surface area; hydrothermal method; mesoporous 1D TiO2 nanostructures.

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