Comparison of Sonochemistry Method and Sol-Gel Method for the Fabrication of TiO₂ Powder

Abstract:

Sol-gel with sonochemical process and sol-gel method were used for the fabrication of photocatalytic TiO₂ powder and the properties of the TiO₂ powder thus prepared were examined and compared. For the synthesis of TiO₂ powder, the starting material was Ti-butoxide and H₂O and the reaction was carried out at 80 °C in a sol-gel method. On the other hand, Ti-butoxide was reacted with H₂O in an ultrasonic frequency of 23 kHz with ultrasonic powers of 800 W for two hours. After evaporation, 24 hours aging time was kept at 400 °C in both cases, the final product appeared was the anatase phase. Ultrasonic chemical method was found to be excellent for flocculation and crushing effects where as in sol-gel method, the product obtained was of high purity and high homogeneity. Sol-gel with sonochemical process has found to be excellent for flocculation and crushing effects. From Sol-gel method, the size of TiO₂ particles produced were found to be about 20 nm, spherical, homogeneous while severe agglomeration. In contrast, by sonochemistry method, the size of TiO₂ particles produced were about 10 ~ 22 nm size and it has shown more photocatalytic activity than sol-gel sample which is about 28.7 % greater efficiency

• Periodical: Materials Science Forum (Volume 695)
• Pages: 109-112
• DOI: https://doi.org/10.4028/www.scientific.net/MSF.695.109
• Online since: July 2011
• Authors: Jinhyuk Choi, Sung Hun Cho, Tae Ho Kim, Soo Wohn Lee
• Keywords: Sol-Gel (SG), Sonochemistry, TiO₂

References

[1] S. Klosek and D. Raftery, J. Phys. Chem. B, Vol. 105 (2001), p.2815.

[2] O. Diwald, T. L. Thompson, T. Zubkov, E. G. Goralski, S. D. Walck, and J. T. Yates, J. Phys. Chem. B, Vol. 108 (2004), p.6004.

[3] R. Bacsa, J.K. Kiwi, T. Ohno, P. Albers, and V. Nadtochenko, J. Phys. Chem. B, Vol. 108 (2001), p.2815.

[4] B. Xin, L. Jing, Z. Ren, B. Wang, and H. Fu, J. Phys. Chem. B, Vol. 109, (2005), p.2805.

[5] Y. Q. Wang, X. J. Yu, and D. Z. Sun, Journal of Hazardous Materials, Vol. 144 (2006), p.328.

[6] A. Di Paola, E. Garcia-Lopez, S. Ikeda, G. Marci, B. Ohtani, and L. Palmisano, Catalysis Today, Vol. 75 (2002), p.87.

[7] Kang Ryeol Lee, Sun Jae Kim, J. Am. Ceram. Soc., Vol. 85 (2002), p.341.

[8] E.A. Barringer and H.K. Bowen, Langmuir, Vol. 1 (1985), p.414.