Multi-step Coating of Monodisperse Silica Spheres by Titania Nanoparticles Base on Electrostatic Attraction Strategy

Journal: Vol.7, No.4, autumn 2014 - Article 4   Pages :   Until 

Article Code:

Maryam Khame Forosh: Iran University of Science and Technology - School of Metallurgy and Materials Engineering
Vahideh Tajer Kajinebaf: Takestan Branch, Islamic Azad University - Department of Materials Engineering
Hossein Sarpoolaky: Iran University of Science and Technology - School of Metallurgy and Materials Engineering

Article's abstract:

TiO2-SiO2 core-shell particles include of monodisperse silica core and nanostructured titania shell were synthesized by a multi-step coating process. The monodisperse silica spheres were synthesized by Stöber method and titania shell was obtained of a colloidal sol prepared by a hydrolysis–condensation reaction. The titania sol was deposited on monodisperse silica spheres by a multi-step coating method based on electrostatic attraction. Characterization was performed by DLS, SEM, DTA-TG, FT-IR and XRD. Also, the activity of the core-shell particles was evaluated using methyl orange photodegradation by UV–visible spectrophotometer. The mean particle size of the colloidal titania sol was determined about 20 nm. The particle size of TiO2-SiO2 core-shell was about 500 nm. The deposit of titania nanoparticles on silica spheres was caused to delay anatase-rutile transformation. The core-shell particles calcined at 650 °C showed a much higher photocatalytic activity than pure titania.

Titania nanoparticle, Silica microsphere, Core-shell, Multi-step coating, Stöber method

1. J. Yu, L. Zhao, B. Cheng, Facile preparation of monodispersed SiO2/TiO2 composite microspheres with high surface area, Mater. Chem. Phys., 96(2006), 311-316.#2. S. Farrokhpay, TiO2 pigment suspension behaviour upon adsorption of polymeric dispersants, Prog. Color Colorants Coat., 3(2010), 66-72.#3. M. Alzamani, A. Shokuhfar, S. Mastali, E. Eghdam, M. A. Hossaini, On the investigation of sol-gel TiO2 nanostructured films applied on windshields pre-coated with SiO2 layer by dip-coating method, Prog. Color Colorants Coat., 6(2013), 51-59.#4. N. Barati, M. A. Faghihi Sani, Coating of titania nanoparticles on stainless steel using an alkoxide precursor, Prog. Color Colorants Coat., 2(2009), 71-78.#5. H. Choi, E. Stathatos, D. D. Dionysiou, Photocatalytic TiO2 films and membranes for the development of efficient wastewater treatment and reuse systems, Desalination, 202(2007), 199-206.#6. H. Choi, E. Stathatos, D. D. Dionysiou, Sol-gel preparation of mesoporous photocatalytic TiO2 films and TiO2/Al2O3 composite membranes for environmental applications, Appl. Catal., B, 63(2006), 60-67.#7. C. J. Tavares, J. Vieira, L. Rebouta, G. Hungerford, P. Coutinho, V. Teixeira, J. O. Carneiro, A. J. Fernandes, Reactive sputtering deposition of photocatalytic TiO2 thin films on glass substrates, Mater. Sci. Eng., B, 138(2007), 139-143.#8. A. Alem, H. Sarpoolaky, M. Keshmiri, Titania ultrafiltration membrane: preparation, characterization and photocatalytic activity, J. Eur. Ceram. Soc., 29(2009), 629-635.#9. A. Alem, H. Sarpoolaky, M. Keshmiri, Sol-gel preparation of titania multilayer membrane for photocatalytic applications, Ceram. Int., 35(2009), 1837-1843.#10. A. A. Habibpanah, S. Pourhashem, H. Sarpoolaky, Preparation and characterization of photocatalytic titania–alumina composite membranes by sol–gel methods, J. Eur. Ceram. Soc., 31(2011), 2867-2875.#11. H. Hao, J. Zhang, Low temperature synthesis of crystalline mesoporous titania with high photocatalytic activity by post-treatment in nitric acid ethanol solution, Mater. Lett., 63(2009), 106-108.#12. T. H. Meen, W. Water, W. R. Chen, S. M. Chao, L. W. Ji, C. J. Huang, Application of TiO2 nano-particles on the electrode of dye-sensitized solar cells, J. Phys. Chem. Solids, 70(2009), 472-476.#13. J. W. Lee, M. R. Othman, Y. Eom, T. G. Lee, W. S. Kim, J. Kim, The effects of sonification and TiO2 deposition on the micro-characteristics of the thermally treated SiO2/TiO2 spherical core-shell particles for photo-catalysis of methyl orange, Microporous Mesoporous Mater., 116(2008), 561-568.#14. Y. Badr, M. A. Mahmoud, Photocatalytic degradation of methyl orange by gold silver nano-core/shell nano-shell, J. Phys. Chem. Solids, 68(2007), 413–419.#15. D. H. Ryu, S. C. Kim, S. M. Koo, Deposition of titania nanoparticles on spherical silica, J. Sol-Gel Sci. Technol., 26(2003), 489-493.#16. J. W. Lee, S. Kong, W. S. Kim, J. Kim, Preparation and characterization of SiO2/TiO2 core-shell particles with controlled shell thickness, Mater. Chem. Phys., 106(2007), 39-44.#17. S. Kamaruddin, D. Stephan, The preparation of silica-titania core-shell particles and their impact as an alternative material to pure nano-titania photocatalysts, Catal. Today, 161(2011), 53-58.#18. S. Kalele, R. Dey, N. Hebalkar, J. Urban, S. W. Gosavi, S. K. Kulkarni, Synthesis and characterization of silica-titania core-shell particles, Pramana J Phys, 65(2005), 787-791.#19. K. Gude, V. M. Gun’ko, J. P. Blitz, Adsorption and photocatalytic decomposition of methylene blue on surface modified silica and silica-titania, Colloids Surf., A, 325(2008), 17-20.#20. O. Kesmez, H. E. Çamurlu, E. Burunkaya, E. Arpac, Sol-gel preparation and characterization of anti-reflective and self-cleaning SiO2-TiO2 double-layer nanometric films, Sol. Energy Mater. Sol. Cells, 93(2009), 1833-1839.#21. W. Stöber, A. Fink, E. Bohn, Controlled growth of monodisperse silica spheres in the micron size range, J. Colloid Interface Sci., 26(1968), 62-69.#22. A. Imhof, Preparation and characterization of titania-coated polystyrene spheres and hollow titania shells, Langmuir, 17(2001), 3579-3585.#23. L. Zhou, S. Yan, B. Tian, J. Zhang, M. Anpo, Preparation of TiO2–SiO2 film with high photocatalytic activity on PET substrate, Mater. Lett., 60(2006), 396-399.#24. Z. Li, B. Hou, Y. Xu, D. Wu, Y. Sun, W. Hu, F. Deng, Comparative study of sol–gel-hydrothermal and sol–gel synthesis of titania–silica composite nanoparticles, J. Solid State Chem., 178(2005), 1395-1405.#25. K. M. S. Khalil, A. A. Elsamahy, M. S. Elanany, Formation and characterization of high surface area thermally stabilized titania/silica composite materials via hydrolysis of titanium(IV) tetra-isopropoxide in sols of spherical silica particles, J. Colloid Interface Sci., 249(2002), 359-365.#26. Y. Djaoued, S. Badilescu, P. V. Ashrit, D. Bersani, P. P. Lottici, J. Robichaud, Study of anatase to rutile phase transition in nanocrystalline titania films, J. Sol-Gel Sci. Technol., 24(2002), 255-264.#27. S. Mozia, A. W. Morawski, M. Toyoda, M. Inagaki, Application of anatase-phase TiO2 for decomposition of azo dye in a photocatalytic membrane reactor, Desalination, 241(2009), 97-105.#28. D. Beydoun, R. Amal, Implications of heat treatment on the properties of a magnetic iron oxide-titanium dioxide photocatalyst, Mater. Sci. Eng., B, 94(2002), 71-81.

Article's file
Page view: 5022
Article's download quantity : 484

Article System Login

Prof. Zahra Ranjbar
Dr. Farahnaz Nourmohammadian
Assistant Editor:
Dr. Mozhgan Hosseinnezhad
ISSN (online):
Institute for Color Science and Technology (ICST)

Quick Access
What is your opinion about the manuscript subscription system of PCCC website?
Website Statistics
Page view:5,023
Online Visitors:32