Influence of high energy ball milling on structural,microstructural and optical properties of TiO2 nanoparticles |
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Affiliation: | 1. Universidad Autónoma de Nuevo León, Facultad de Ingeniería Mecánica y Eléctrica, Centro de Investigación e Innovación en Ingeniería Aeronáutica (CIIIA); Carretera a Salinas Victoria Km. 2.3, C.P., 66600, Apodaca, N.L., Mexico;2. Nanomateriales SA de CV, Av. Milimex 215, Parque Industrial Milimex, C.P., 66626, Apodaca, N.L., Mexico;3. Centro de Investigación y de Estudios Avanzados Del IPN-Unidad Saltillo, Av. Industria Metalúrgica 1062, Parque Industrial Saltillo-Ramos Arizpe, Ramos Arizpe, Coah., 25900, Mexico;4. Universidad Autónoma de Coahuila, Facultad de Metalurgia, Carr. 57, Km 4.5, C.P., 25710, Monclova, Coah., Mexico;5. Universidad Nacional de Moquegua; Facultad de Ingeniería de Minas, Calle Ancash S/N, Moquegua, Peru |
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Abstract: | The influence of high-energy ball milling on structural, microstructural, and optical properties of TiO2 by modifying the nanoparticle size was studied. Five samples were extracted at different milling times (0, 2, 4, 8, and 13 h). The average particle sizes estimated by dynamic light scattering (DLS) were 205, 155.8, 116.8, 82.9, and 82.7 nm at 0, 2, 4, 8, and 13 h, respectively. X-ray diffraction analysis confirmed progressive broadening of the peaks as the milling time elapsed. Besides, a correlation was found between d spacing and the average crystal size. The UV–Vis diffuse reflectance spectra of TiO2 revealed a decrease in reflectance due to particle size reduction. Similarly, an alteration of the bandgap transition energy was presented, whose values gradually decreased from 2.966 eV to 2.861 eV for the sample without and with the maximum duration milling performed (13 h), respectively. Likewise, the SEM analysis showed a distribution in nanoparticle size that became more homogeneous and smaller average grain size as the milling duration was longer. |
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Keywords: | High-energy ball milling Particle size X-ray diffraction Optical properties |
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