Abstract
In this study, SiO2/TiO2–organoclay hybrids with high adsorption capability and high photocatalytic activity were synthesized by immobilizing mixed silica and titanium dioxide nanoparticles on organically modified clay via a hydrothermal sol–gel method. Addition of negatively charged silica particles enhanced the uniform dispersion of titanium dioxide nanoparticles on organoclay layers by decreasing the system tension, which resulted in high photocatalytic activity of SiO2/TiO2–organoclay hybrids. The high adsorption capability endowed by organically modified clay enriched the organic compounds around the photoactive sites, and thus greatly improved the photodegradation efficiency. Combining the high adsorption capability of organoclay with the high photocatalytic activity of TiO2 nanoparticles, SiO2/TiO2–organoclay hybrids were promising and cost-effective photocatalysts in removal of pollutants from wastewater.
Similar content being viewed by others
References
Theng BKG (1974) The chemistry of clay-organic reactions. Wiley, New York
Ogawa M, Kuroda K (1997) Bull Chem Soc Jpn 70:2593
Shen YH (2002) Water Res 36:1107
Boyd SA, Lee J-F, Mortland MM (1988) Nature 333:345
Jaynes WF, Boyd SA (1991) Soil Sci Soc Am J 55:43
Wagner J, Chen H, Brownawell BJ, Westall JC (1994) Environ Sci Technol 28:231
Celik A, Yildiz N, Calimli A (1999) Rev Chem Eng 15:349
Dentel SK, Bottero JY, Khatib K, Demougeot H, Duguet JP, Anselme C (1995) Water Res 29:1273
Koh SM, Dixon JB (2001) Appl Clay Sci 18:111
Hoffmann MR, Martin ST, Choi WY, Bahnemann DW (1995) Chem Rev 95:69
Fujishima A, Hashimoto K, Watanabe T (1999) TiO2 photocatalysis: fundamentals and applications. BKC Inc., Tokyo
Wan-Kuen J, Park KH (2004) Chemosphere 57:555
Nagaveni K, Sivalingam G, Hegde MS, Madras G (2004) Environ Sci Technol 38:1600
Ao CH, Lee SC, Yu JC (2003) J Photochem Photobiol A-Chem 156:171
Xu YM, Langford CH (1997) J Phys Chem B 101:3115
Bhattacharyya A, Kawi S, Ray MB (2004) Catal Today 98:431
Kun R, Mogyorosi K, Dekany I (2006) Appl Clay Sci 32:99
Zhu HY, Li JY, Zhao JC, Churchman GJ (2005) Appl Clay Sci 28:79
Letaief S, Martin-Luengo MA, Aranda P, Ruiz-Hitzky E (2006) Adv Funct Mater 16:401
Zhang WF, He YL, Zhang MS, Yin Z, Chen Q (2000) J Phys D Appl Phys 33:912
Pottier AS, Cassaignon S, Chaneac C, Villain F, Tronc E, Jolivet JP (2003) J Mater Chem 13:877
Tyagi B, Chudasama CD, Jasra RV (2006) Appl Clay Sci 31:16
Stol RJ, DeBruyn PL (1980) J Colloid Interf Sci 75:185
Acknowledgements
This work was financially supported by the National Natural Science Foundation of China (Grant nos. 50473054 and 50533070) and the Major Basic Research Projects of China (Grant 003CB615600).
Author information
Authors and Affiliations
Corresponding author
Rights and permissions
About this article
Cite this article
Meng, X., Qian, Z., Wang, H. et al. Sol–gel immobilization of SiO2/TiO2 on hydrophobic clay and its removal of methyl orange from water. J Sol-Gel Sci Technol 46, 195–200 (2008). https://doi.org/10.1007/s10971-008-1677-4
Received:
Accepted:
Published:
Issue Date:
DOI: https://doi.org/10.1007/s10971-008-1677-4