SiO2/TiO2 composite aerogels: Preparation via ambient pressure drying and photocatalytic performance
Source abstract
Abstract
Silica/titania (SiO2/TiO2) (Si/Ti= 1:1) composite aerogels have been manufactured via ambient pressure drying using tetraethoxysilane (TEOS) and tetrabutyl titanate (TBT) as precursors. Changes in the structure and the surface properties of the aerogels during the heat treatment were investigated in detail by N-2 adsorption-desorption techniques, SEM, TEM, XRD, FTIR, and UV-vis absorption spectra. The results showed that the as obtained aerogel with a porous structure possessed a surface area of 667 m(2)/g, average pore size 3.4 nm, and pore volume 0.68 cm(3)/g. After calcination, the surface area decreased while the average pore size and the pore volume increased with the rise of heat treatment temperature. FUR spectra showed the existence of Si-O-Ti in the aerogels and that after calcination at 800 degrees C, anatase nanoparticle appeared as demonstrated in XRD pattern. The photocatalytic performance was evaluated by degradation of MB and the results demonstrated that the aerogels calcined at 800 degrees C have a better photocatalytic activity than other samples. (C) 2014 Elsevier Ltd and Techna Group S.r.l. All rights reserved.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: TiO2 Photocatalysis and Solar Cells · Advanced Photocatalysis Techniques · Aerogels and thermal insulation
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (33)
Show source-provided references
1. Dependence of photocatalytic activity of anatase powders on their crystallinity10.1016/j.chemosphere.2005.11.052 ↗
2. Enhanced photocatalytic activity of TiO2–C hybrid aerogels for methylene blue degradation10.1038/srep03018 ↗
3. Photocatalytic activity and OH radical formation on TiO2 in the relation to crystallinity10.1016/j.apcatb.2005.12.036 ↗
4. Effects of particle size of TiO2 on photocatalytic degradation of methylene blue in aqueous suspensions10.1021/ie980378u ↗
5. Titanium dioxide nanomaterials: synthesis, properties, modifications, and applications10.1021/cr0500535 ↗
6. Photoactivity of titanium dioxide supported on MCM41, zeolite X, and zeolite Y10.1021/jp962494l ↗
7. Hydrothermal synthesis of nanosized anatase and rutile TiO2 using amorphous phase TiO210.1039/b008974p ↗
8. Highly crystalline spindle-shaped mesoporous anatase titania particles: solution-phase synthesis, characterization, and photocatalytic properties10.1021/la1009384 ↗
9. Mesoporous titania: from synthesis to application10.1016/j.nantod.2012.06.012 ↗
10. Synchronous role of coupled adsorption and photocatalytic oxidation on ordered mesoporous anatase TiO2–SiO2 nanocomposites generating excellent degradation activity of RhB dye10.1016/j.apcatb.2009.12.025 ↗
11. High-surface-area titania aerogels—preparation and structural-properties10.1039/jm9920200587 ↗
12. Synthesis and characterization of titania aerogels10.1021/cm00024a037 ↗
13. Size and shape characterization of TiO2 aerogel nanocrystals10.1016/S0965-9773(96)00049-9 ↗
14. Photocatalytic activity of epoxide sol–gel derived titania transformed into nanocrystalline aerogel powders by supercritical drying10.1016/j.molcata.2006.04.043 ↗
15. Titania aerogel prepared by low temperature supercritical drying10.1016/j.micromeso.2005.10.046 ↗
16. Aerogel commercialization: technology, markets and costs10.1016/0022-3093(95)00069-0 ↗
17. Superhydrophobic silica aerogel microspheres from methyltrimethoxysilane: rapid synthesis via ambient pressure drying and excellent absorption properties10.1039/C3RA46911E ↗
18. Preparation of TiO2 aerogels by a sol–gel combined solvothermal route10.1039/b819849g ↗
19. UV-resistant hydrophobic rutile titania aerogels synthesized through a nonalkoxide ambient pressure drying process10.1557/jmr.2012.272 ↗
20. SiO2 aerogels
21. Silica–titania aerogel monoliths with large pore volume and surface area by ambient pressure drying10.1007/s10971-009-2042-y ↗
22. Synthesis of TiO2–SiO2 aerogel via ambient pressure drying: effects of sol pre-modification on the microstructure and pore characteristics10.1007/s10971-013-3190-7 ↗
23. Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity10.1351/pac198557040603 ↗
24. Synthesis and micro structural investigations of titania–silica nano composite aerogels10.1016/j.matchemphys.2012.05.014 ↗
25. Fabrication of titania and titania–silica aerogels using rapid supercritical extraction10.1007/s10971-012-2741-7 ↗
26. Ambient-dried silica aerogel doped with TiO2 powder for thermal insulation10.1023/A:1026775632209 ↗
27. Synthesis and characterization of superhydrophobic silica and silica/titania aerogels by sol–gel method at ambient pressure10.1016/j.colsurfa.2009.04.016 ↗
28. Controllable and repeatable synthesis of thermally stable anatase nanocrystal−silica composites with highly ordered hexagonal mesostructures10.1021/ja073804o ↗
29. Synthesis of monolithic titania–silica composite aerogels with supercritical drying process
30. Preparation of freestanding and crack-free titania–silica aerogels and their performance for gas phase, photocatalytic oxidation of VOCs10.1016/j.apcatb.2006.07.022 ↗
31. Photo catalytic oxidation of TNT using TiO2–SiO2 nano-composite aerogel catalyst prepared using sol–gel process10.1007/s10971-011-2445-4 ↗
32. Preparation and characterization of highly active mesoporous TiO2 photocatalysts by hydrothermal synthesis under weak acid conditions10.1016/j.micromeso.2009.05.009 ↗
33. Highly efficient nanocrystalline titania films made from organic/inorganic nanocomposite gels10.1016/j.micromeso.2004.07.006 ↗