Effect of Silica Addition on Phase Transformation Characteristics of Heat-Treated Combustion-Synthesized TiO2 Nanoparticles

실리카가 첨가된 연소합성 TiO2 나노입자의 열처리에 따른 상변환 특성

  • 김민수 (전북대학교 대학원 기계설계공학부) ;
  • 이교우 (전북대학교 기계설계공학부)
  • Published : 2009.03.01


In this article, the effect of silica addition on the phase transformation characteristics of $TiO_2$ nanoparticles synthesized by using an $O_2$-enriched coflow, hydrogen, diffusion flame was investigated. TTIP(titanium tetra-isopropoxide) and TEOS(tetraethyl-orthosilicate) were used as precursors for $TiO_2$ and $SiO_2$ nanoparticles, respectively. Based on the results from TEM and XRD analysis, it is believed that the silica addition on the flame synthesis of $TiO_2$ nanoparticles reduces the particle size distribution and raises the temperature of the phase transition from anatase to rutile. But the reduced sizes of the synthesized particles due to the silica addition made the sintering and phase transformation of particles more easily.



  1. Nishide, T., Sato, M. and Hara, H., 2000, "Crystal Structure and Optical Property of TiO2 Gels and Films Prepared from Ti-edta Complexes as Titania Precursors," J. Materials. Sci., Vol. 35, No. 2, pp. 465-469
  2. Ping, C., Maoping, Z., Yanping, J., Qiang, H. and Mingyuan, G., 2003, "Preparation and Characterization of Silica-Doped Titania Photocatalyst Through Sol-Gel Method," Materials Letters., Vol. 57, pp. 2989-2994
  3. Okada, K., Yamamoto, N., Kameshima, Y., Yasumori, A. and Mackenzie, K. J. D., 2001, "Effect of Silica Additive on the Anatase-to-Rutile Phase Transition," J. Am. Ceram. Soc., Vol. 84, No. 7, pp. 1591-1596
  4. Xinrong, W., Hiroshi, M., Yoshihiro, S. and Toshio, H., 1999, "Micro-Structure and Optical Properties of Amorphous $TiO_2-SiO_2$ Composite Films Synthesized by Helicon Plasma Sputtering," Thin Solid Flims, Vol. 338, pp. 105-109
  5. Lee, M. J., Jun, A. K., Lee, J. Y. and Yoon, K. H., 2004, "Preparation of $TiO_2-SiO_2$ Sol and Its Photo-Catalyst Properties for High Temperatures," K. Am. Ceram. Soc., Vol. 41, No. 6, pp. 471-475
  6. Kornman, C., Bahnemann, D. and Hoffmann, M., 1991, "Photolysis of Chloroform and Other Molecules in Aqueous TiO2 Suspensions," Environmental Science and Technology, Vol. 25, pp. 494-500
  7. Lee, M. S., Ju, C. S., Lee, G. D. and Hong, S. S., 2003, "Effect of the Water/Surfactant Molar Ratio (W0) on Synthesis of Nanosized $TiO_2/SiO_2$ by W/O Microemulsion and Their Photocatalytic Activity," The Korean Institute of Chemical Engineers, Vol. 41, No. 4, pp. 432-438
  8. Choi, S. M. and Lee, G. W., 2008, "Phase Transformation Characteristics of Combution Synthesized $TiO_2$ Nanopaticles," Trans. of the KSME(B)., Vol. 32, No. 3, pp. 224-230
  9. Spurr, R. A. and Myers, H., 1957, "Quantative Analysis Of Anatase-to-Rutile Mixture with an x-ray Diffractometer," Anal. Chem., Vol. 29, No. 5, pp. 760-761