Titanium dioxide (TiO2) was synthesized by microwave assisted sol-gel. The effect of the acidtype used as catalyst on the phase transformation of TiO2 was investigated (hydrochloricor acetic acid). The samples obtained were characterized by scanning electron microscopy(SEM), this micrographs showed particles with irregular shapes. The results of Fouriertransform-infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS) showedpresent signals of O and Ti. When hydrochloric acid was used as catalyst, three titania poly-morphs were detected by X-ray diffraction (XRD), anatase, rutile and brookite, where thecrystallite size was in the range of 9 and 16 nm. On the other hand, a single anatase phasewas formed when acetic acid was used after only 15 min of reaction time. The anataseaverage crystallite size was obtained between 11 and 22 nm.
Andrade-Guel, M., Díaz-Jiménez, L., Cortés-Hernández, D., Cabello-Alvarado, C., ávila-Orta, C., Bartolo-Pérez, P., & Gamero-Melo, P. (2018). Microwave assisted sol-gel synthesis of titaniumdioxide using hydrochloric and acetic acid ascatalysts. Boletin de La Sociedad Espanola de Ceramica y Vidrio. https://doi.org/10.1016/j.bsecv.2018.10.005