The Flocculation and Stability of TiO₂ Nanoparticles

Abstract:

In this work, TiO₂ nanoparticles (NPs) were prepared through a well-developed hydrothermal method. The dry products were characterized by digital camera, transmission electron microscopy (TEM), X-ray diffraction (XRD) and thermogravimetric method (TGA). These results suggested that TiO₂NPs were well-crystallized and oleic acid-capped (OA-capped; 33.42 wt.%). In order to investigate the flocculation and stability of TiO2NPs colloids, redispersed experiments were carried out by altering the preparative parameters (e.g., redispersion solvent, washing times). In addition, the compounding stability of TiO₂NPs colloids with AuNPs colloids and MnO_4- solution under processing conditions (e.g., aging with stirring and under UV irradiation) were also studied. In principle, systematic investigations of flocculation and stability of TiO₂NPs will be useful for their potential applications including novel photocatalysts and biosensors.

• Periodical: Advanced Materials Research (Volume 548)
• Pages: 138-142
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.548.138
• Online since: July 2012
• Authors: Xiao Ying Liu, Xiao Dong Hao, Chun Xiang Gu, Yu Xin Zhang, Xin Lu Li, Jia Mu Huang
• Keywords: Colloids, Flocculation, Stability, TiO₂ Nanoparticle

References

[1] T. Kemmitt: Current Applied Physics, 2004, 4(2-4): 189-192.

[2] Z. Liu, X. Zhang, T. Murakami, A. Fujishima: Solar Energy Materials and Solar Cells, 2008, 92(11): 1434-1438.

DOI: 10.1016/j.solmat.2008.06.005

[3] M. Janus, J. Choina, A. W. Morawski: Journal of Hazardous Materials, 2009, 166(1): 1-5.

[4] P. Novotná, J. Zita, J. Krýsa, V. Kalousek, J. Rathouský: Applied Catalysis B: Environmental, 2008, 79(2): 179-185.

DOI: 10.1016/j.apcatb.2007.10.012

[5] A. Nakajima, K. Hashimoto, T. Watanabe, K. Takai, G. Yamauchi, A. Fujishima: Langmuir, 2000, 16(17): 7044-7047.

DOI: 10.1021/la000155k

[6] I. P. Parkin, R. G. Palgrave: Journal of Materials Chemistry, 2005, 15(17): 1689.

[7] T. Maggos, J. G. Bartzis, M. Liakou, C. Gobin: Journal of Hazardous Materials, 2007, 146(3): 668-673.

DOI: 10.1016/j.jhazmat.2007.04.079

[8] P. Evans, D. W. Sheel: Surface and Coatings Technology, 2007, 201(22-23): 9319-9324.

[9] A. Fujishima, X. Zhang, D. Tryk: Surface Science Reports, 2008, 63(12): 515-582.

[10] D. Pan, N. Zhao, Q. Wang, S. Jiang, X. Ji, L. An: Advanced Materials, 2005, (17): 1991-(1995).

[11] M. Brust, M. Walker, D. Bethell, D. J. Scjoffrin, R. Whyman: J. CHEM. SOC., CHEM. COMMUN, 1994: 801-802.

[12] Y. X. Zhang, H. C. Zeng: The Journal of Physical Chemistry B, 2006, 110(34): 16812-16815.

[13] J. Li, H. C. Zeng: Chemistry of Materials, 2006, 18(18): 4270-4277.