Synthesis and photocatalytic performance of hollow sphere particles of SiO2-TiO2 composite of mesocellular foam walls
Source abstract
Abstract
Abstract Hollow Microspheres of SiO 2 -TiO 2 photocatalysts whose walls are made up of mesoporous cellular foams were synthesized with the aid of hexane as a swelling agent and P123 as a pore template by an emulsion templating method. Pore structure of materials and crystal phase of titanium oxide was tailored by hydrothermal and calcination temperature during synthesis of samples. The samples were characterized with field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), N 2 adsorption–desorption experiments, X-ray photoelectron spectroscopy (XPS) and X ray diffraction (XRD) techniques. The effect of pore structure and titania phase on photoactivity were evaluated by methylene blue (MB) degradation test under UV light as well. Results showed that hydrothermal temperature during synthesis process has a significant effect on pore and window sizes of mesostructured cellular foam. Interestingly, for the sample hydrothermally treated at higher temperature (130 °C), anatase to rutile transformation was avoided after calcination treatment as high as 800 °C. The highest photocatalytic activity was detected from the sample hydrothermally treated at 130 °C and calcined at 800 °C for which the highest degree of crystallinity and anatase phase as well as enhanced pore connectivity was obtained.
Source: openaire · Quality: candidate unverified · Source record ↗
Research context
OpenAlex topics: Advanced Photocatalysis Techniques · TiO2 Photocatalysis and Solar Cells · Mesoporous Materials and Catalysis
SciVX discovery tags are terminology-based. OpenAlex topics are source-provided classifications.
References (40)
Show source-provided references
1. Photocatalytic degradation of natural organic matter: kinetic considerations and light intensity dependence
2. Nanocrystalline titanium oxide electrodes for photovoltaic application10.1111/j.1151-2916.1997.tb03245.x ↗
3. The chemical states and properties of doped TiO 2 film photocatalyst prepared using the sol-gel method with TiCl 4 as a precursor10.1016/S0169-4332(99)00587-5 ↗
4. Enhanced photocatalytic activity of mesoporous and ordinary TiO< sub> 2} thin films by sulfuric acid treatment10.1016/S0926-3373(01)00277-6 ↗
5. Synthesis of titania-silica mixed oxide mesoporous materials, characterization and photocatalytic properties10.1016/j.apcata.2005.01.037 ↗
6. Synthesis of hexagonally packed mesoporous TiO2 by a modified sol-gel method10.1002/anie.199520141 ↗
7. The hydrothermal synthesis of mesoporous TiO 2 with high crystallinity, thermal stability, large surface area, and enhanced photocatalytic activity10.1016/j.apcata.2007.02.010 ↗
8. Mesoporous titania photocatalyst: effect of relative humidity and aging on the preparation of mesoporous titania and on its photocatalytic activity performance10.1007/s11164-012-0611-0 ↗
9. Characterization and evaluation of the photocatalytic properties of wormhole-like mesoporous silica incorporating TiO2, prepared using different hydrothermal and calcination temperatures10.1007/s11164-012-0498-9 ↗
10. Photocatalytic activity, surface area and phase modification of mesoporous SiO 2–TiO 2 prepared by a one-step hydrothermal procedure10.1016/j.ceramint.2014.03.071 ↗
11. The effects of hydrothermal temperature on structural and photocatalytic properties of ordered large pore size TiO 2–SiO 2 mesostructured composite10.1016/j.jallcom.2011.12.051 ↗
12. R. Beau, J. Duchene, M. Le Page, Porous silica particles containing a crystallized phase and method, 1970.
13. Mesocellular siliceous foams with uniformly sized cells and windows10.1021/ja983218i ↗
14. Hexagonal to mesocellular foam phase transition in polymer-templated mesoporous silicas10.1021/la000660h ↗
15. Structure and catalytic properties of vanadium oxide supported on mesocellulous silica foams (MCF) for the oxidative dehydrogenation of propane to propylene10.1016/j.jcat.2005.12.028 ↗
16. TS-1 coated mesocellular titano-silica foams as new catalysts for oxidation of bulky molecules10.1039/b304834a ↗
17. Synthesis and characterization of large mesoporous silica SBA-15 sheets with ordered accessible 18 nm pores10.1016/j.matlet.2009.07.013 ↗
18. Phase evolution in the alkane–P123–water–TEOS quadru-component system: a feasible route to different complex mesostructured materials10.1039/B602374F ↗
19. Alkanes-assisted low temperature formation of highly ordered SBA-15 with large cylindrical mesopores
20. Hierarchical fabrication of silica cocoon with hexagonally ordered channel constructed wall via an emulsion-assisted process10.1016/j.micromeso.2011.09.016 ↗
21. Reporting physisorption data for gas/solid systems with special reference to the determination of surface area and porosity (Recommendations 1984)10.1351/pac198557040603 ↗
22. Physisorption of gases, with special reference to the evaluation of surface area and pore size distribution (IUPAC Technical Report)10.1515/pac-2014-1117 ↗
23. Hydrothermal stability of SBA-15 and related ordered mesoporous silicas with plugged pores10.1039/b603723b ↗
24. Hydrothermal stability of mesostructured cellular silica foams10.1021/jp9100784 ↗
25. Formation of nanosized TiO2 in mesoporous silica thin films10.1002/1521-4095(20020605)14:11<830::AID-ADMA830>3.0.CO;2-W ↗
26. Synthesis of TiO2/SiO2 core/shell nanocable arrays10.1021/jp049770d ↗
27. Thermally stable SiO 2-doped mesoporous anatase TiO 2 with large surface area and excellent photocatalytic activity10.1016/j.jcis.2010.01.002 ↗
28. Black hydroxylated titanium dioxide prepared via ultrasonication with enhanced photocatalytic activity
29. Hydrothermal synthesis, characterization, and photocatalytic performance of silica-modified titanium dioxide nanoparticles10.1016/j.jcis.2005.02.082 ↗
30. Thermodynamic analysis of phase stability of nanocrystalline titania10.1039/a802619j ↗
31. Crystallization of anatase from amorphous titania using the hydrothermal technique: effects of starting material and temperature10.1021/jp990521c ↗
32. Synthesis and characterization of nano titania powder with high photoactivity for gas-phase photo-oxidation of benzene from TiOCl2 aqueous solution at low temperatures10.1021/la0489716 ↗
33. Surfactant-directed synthesis of mesoporous titania with nanocrystalline anatase walls and remarkable thermal stability10.1021/jp036830r ↗
34. Synthesis of thermally stable and highly ordered bicontinuous cubic mesoporous titania-silica binary oxides with crystalline framework10.1016/j.micromeso.2009.05.019 ↗
35. Low temperature synthesis of nanosize rutile titania crystal in liquid media10.1016/S0254-0584(02)00034-2 ↗
36. Silica-titania mixed oxides: Si-O-Ti connectivity, coordination of titanium, and surface acidic properties10.1007/s10562-008-9500-y ↗
37. Quantitative analysis of anatase-rutile mixtures with an X-ray diffractometer10.1021/ac60125a006 ↗
38. Photocatalytic behavior of TiO 2 thin films prepared by sol–gel process10.1016/j.matchemphys.2005.06.001 ↗
39. Effect of hydrothermal treatment of amorphous titania on the phase change from anatase to rutile during calcination10.1021/cm990172z ↗
40. Zirconia-stabilized 25-Å TiO2 anatase crystallites in a mesoporous structure10.1021/cm980237i ↗