Hostname: page-component-76fb5796d-skm99 Total loading time: 0 Render date: 2024-04-25T15:04:55.268Z Has data issue: false hasContentIssue false
  • English
  • Français

Polymer-Titania Composites for Photocatalysis of Organics in Aqueous Environments

Published online by Cambridge University Press:  31 January 2011

Cecil A Coutinho  and
Vinay K Gupta
Cecil A Coutinho
Affiliation:
ccoutinh@mail.usf.edu, University of South Florida, Chemical Engineering, Tampa, Florida, United States
Vinay K Gupta
Affiliation:
vkgutpa@eng.usf.edu, University of South Florida, Chemical Engineering, Tampa, Florida, United States
Get access

Abstract

Microcomposites composed of titanium dioxide nanoparticles embedded within cross-linked, thermally responsive microgels of poly(N-isopropylacrylamide) were prepared. These microcomposites showed rapid sedimentation, which is useful for gravity separation of the titania nanoparticles in applications such as environmental remediation. To investigate the degradation kinetics using these microcomposites in aqueous suspensions, methyl orange was employed as a model contaminant. The decline in the methyl orange concentration was monitored using UV-Vis spectroscopy. Degradation of methyl orange was also measured using only nanoparticles TiO2 (DegussaTM P25) for comparison with the microcomposites. Experiments were performed at different pH conditions that spanned acidic, neutral, and basic conditions to gain insight into the interplay of TiO2 surface charge, ionization of the polyelctrolyte chains in the microcomposites, and ionization of the methyl orange.

Keywords

compositeenvironmentally benigncatalytic
Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 1171: Symposium S – Materials in Photocatalysis and Photoelectrochemistry for Environmental Applications and H2 Generation , 2009 , 1171-S04-01-Q05-01
Copyright
Copyright © Materials Research Society 2009

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

1 Earle, M. D. Physical Review 61, 56–62 (1942).Google Scholar
2 Fujishima, A. Rao, T. N. and Tryk, D. A. Journal of Photochemistry and Photobiology, C: Photochemistry Reviews 1 (1), 1–21 (2000).Google Scholar
3 Serpone, N. and Khairutdinov, R. F. Studies in Surface Science and Catalysis 103, 417–444 (1997).Google Scholar
4 Hoffmann, M. R. Martin, S. T. Choi, W. and Bahnemann, D. W. Chemical Reviews 95 (1), 69–96 (1995).Google Scholar
5 Chun, H. Yizhong, W. and Hongxiao, T. Applied Catalysis, B: Environmental 30 (3,4), 277–285 (2001).Google Scholar
6 Lee, S. A. Choo, K. H. Lee, C. H. Lee, H. I. Hyeon, T. Choi, W. and Kwon, H. H. Industrial & Engineering Chemistry Research 40 (7), 1712–1719 (2001).Google Scholar
7 Pozzo, R. L. Giombi, J. L. Baltanas, M. A. and Cassano, A. E. Catalysis Today 62 (2-3), 175–187 (2000).Google Scholar
8 Coutinho, C. A. Harrinauth, R. K. and Gupta, V. K. Colloids and Surfaces, A: Physicochemical and Engineering Aspects 318 (1-3), 111–121 (2008).Google Scholar
9 Bacsa, R. R. and Kiwi, J. Applied Catalysis, B: Environmental 16 (1), 19–29 (1998).Google Scholar
10 Gupta, V. K. Jain, R. Mittal, A. Mathur, M. and Sikarwar, S. Journal of colloid and interface science 309 (2), 464–469 (2007).Google Scholar
11 Kansal, S. K. Singh, M. and Sud, D. Journal of hazardous materials 141 (3), 581–590 (2007).Google Scholar
12 Zhu, F. Zhang, J. Yang, Z. Guo, Y. Li, H. and Zhang, Y. Physica E: Low-Dimensional Systems & Nanostructures 27 (4), 457–461 (2005).Google Scholar
13 Kurihara, M. and Matsuyama, H. JP Patent 2004067740 Patent No. JP Patent 2004067740 (2004).Google Scholar
14 Gupta, V. Kumar, A. Coutinho, C. and Mudhivarthi, S. WO 2008052216Google Scholar