Abstract
The relationship between the hydrolysis conditions of titanium tetraisopropoxide (TTIP) and the thermal transformation of the hydrolysis products was investigated as a part of study on the properties of TiO2 formed by the hydrolysis of titanium alkoxide. The amorphous products formed under the HNO3 and HCl acidic conditions transformed to anatase at about 200°C. This temperature was about 100°C higher than that of the amorphous products formed with neutral water, and was not correlated with the H2O/TTIP molar ratio. On the other hand, the anatase-rutile transformation was significantly accelerated under the acidic condition. In particular, the single-phase rutile particles which were needle-shaped and about 0.1μm in length were formed at room temperature when the concentrations of acids were more than 6wt% for HNO3 and more than 4wt% for HCl at the molar ratio of H2O/TTIP=20. In the case of the hydrolysis product formed under H2SO4 acidic condition, on the contrary, the temperatures of the amorphous-anatase and anatase-rutile transformations were higher than those of hydrolysis products with neutral water, and its values were 300 and 700°C, respectively.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
