title: Textural, structural and electrical properties of TiO2nanoparticles using Brij 35 and P123 as surfactants.
abstract: The effect of the use of the triblock copolymer Pluronic P123[(PEO)20(PPO)70(PEO)20, Aldrich] and the non-ionic polyoxyethylene-lauryl ether Brij 35 as surfactants on the textural, structural and electrical properties of nanosized TiO2is analyzed in this work. The as-obtained samples were thermally treated at 400 °C to eliminate the surfactant, promote dehydroxylation and crystallize the sample. The TiO2samples were characterized by thermal analysis, N2physisorption, x-ray diffraction analysis, micro-Raman spectroscopy and scanning electron microscopy. To evaluate the TiO2electrical features, I-V data were obtained. The x-ray diffraction results show that in the chemical synthesis using surfactants, the crystallite size is smaller than that of the commercial sample. The Raman spectroscopy results clearly indicate that, when P123 is used, the anatase phase of TiO2is obtained, whereas when Brij 35 is used a mixture of the anatase and brookite phases is obtained. The specific surface area and crystallite size of the TiO2prepared as indicated above are higher and smaller, respectively, than the corresponding properties found in commercial TiO2. The I-V plot showed a nonlinear behavior of the nanosized TiO2. The samples obtained with P123 showed the best electrical conductivity.
authors.affiliation: Facultad de Química, UAEM, Paseo Colón y Tollocan 50,000, Toluca, México.
authors.forename: Dora
authors.initials: D
authors.lastname: Solís
authors.affiliation: Facultad de Química, UAEM, Paseo Colón y Tollocan 50,000, Toluca, México.
authors.forename: Enrique
authors.initials: E
authors.lastname: Vigueras-Santiago
authors.affiliation: Facultad de Química, UAEM, Paseo Colón y Tollocan 50,000, Toluca, México.
authors.forename: Susana
authors.initials: S
authors.lastname: Hernández-López
authors.affiliation: Instituto de Física, UNAM A. P. 20-364 México DF 01000 México.
authors.forename: Antonio
authors.initials: A
authors.lastname: Gómez-Cortés
authors.affiliation: Instituto de Física, UNAM A. P. 20-364 México DF 01000 México.
authors.forename: Manuel
authors.initials: M
authors.lastname: Aguilar-Franco
authors.affiliation: Facultad de Química, UAEM, Paseo Colón y Tollocan 50,000, Toluca, México.
authors.forename: Marco Antonio
authors.initials: MA
authors.lastname: Camacho-López
keywords: Brij 35; P123; electrical resistance; nanosized titania; self-assembly technique