Work

Effect of brookite on the photocatalytic properties of mixed-phase TiO2 obtained at a higher temperature

Year: 2022

Type: article

Abstract: The paper presents the synthesis and properties of nanometric TiO 2 powders obtained by the sol–gel method at elevated temperatures. The presence of brookite inhibits the anatase - rutile transformation at higher temperatures. Even after the treatment of gel at 700 °C, a large amount of anatase in the TiO 2 powders was found. Measurements in the UV–vis range were performed to determine the optical band-gap of TiO 2 . Results of photocatalytic tests for the degradation of RhB and NO under UV are also presented. The decomposition efficiency of the powders was compared with the P25 before and after treatment at 700 °C. The obtained powders despite being prepared at this temperature were more efficient in both RhB and NO decomposition compared to the reference sample. The results indicate the possibility of modifying materials that are produced or work at high temperatures, by adding such TiO 2 with high photocatalytic capacity in the UV range.

Source: Materials Science and Engineering B

DOI: 10.1016/j.mseb.2022.116104