Abstract
Nanosized titanium dioxide (TiO2) is used in different applications that require a specific crystalline structure. In this work, SBA-15:TiO2 nanocomposites (80 mol% Si and 20 mol% Ti) were prepared using two different synthesis routes (direct and post-synthesis), with and without acetylacetone and a modified hydrothermal route (M). The small angle X-ray diffraction data showed that all nanocomposites are ordered mesoporous materials. N2 adsorption-desorption analysis showed that the materials exhibit a narrow pore size distribution with mean pore diameters up to 9.9 nm, high surface areas up to 810 m2 g−1 and large pore volumes up to 1.3 cm3 g−1. The analysis of the morphology by scanning electron microscopy (SEM) revealed different particle shapes due to the inclusion of Ti together with the Si source in the direct synthesis route. The characterization by X-ray diffraction revealed that the presence of acetylacetone and the M route in the direct synthesis method favored the formation of the rutile phase (>90%). Additionally, the posterior inclusion of Ti (post-synthesis) favored the formation of single phase anatase (100%). In addition, the SEM images showed that the silica particle size is about 1 μm, thus being biologically safe and making the composite a very promising photoprotector.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: 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.