화학공학소재연구정보센터
홈 로그인 로그아웃 연락처 사이트맵
Journal of Industrial and Engineering Chemistry, Vol.10, No.3, 435-441, May, 2004
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Formation and Characterization of TiO2-coated SiO2 Nanoparticles by W/O Microemulsion Method
Soon Hoi Kim, Ki Do Kim, Kun Yong Song, and He Taik Kim†
  • Department of Chemical Engineering, Hanyang University, Ansan-si 426-791, Korea
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Monodisperse, spherical TiO2-coated SiO2 nanoparticles were synthesized using a Water-in-Oil (W/O) microemulsion method. In this process, SiO2 nanoparticles, which act as carrier particles for the coating, were also prepared by a microemulsion method. The mean size of the SiO2 nanoparticles was 20 nm. The reaction parameters were the concentration of tetraethylorthotitanate (TEOT), the feed rate of the starting solutions (TEOT + NP-5 + cyclohexane), the pH, and the reaction temperature. We found that the particle size decreased upon decreasing the TEOT concentration and the feed rate. In addition, it was advisable to maintain the reaction temperature and pH at 15 ℃ and 4, respectively. Consequently, the optimal conditions for the preparation of TiO2-coated SiO2 nanoparticles having narrow particle size distribution were a TEOT concentration of 0.03 ~ 0.04 M, a feed rate of 1.3 ~ 1.5 mL/min, a reaction temperature of 15 ~ 18 ℃, and a pH 4 ~ 5.
Keywords:TiO2-coated SiO2;W/O microemulsion;nanoparticles
  1. Yoldas BE, J. Appl. Chem. Biotechnol., 23, 803 (1973)
  2. Kim KD, Kim HT, Powder Technol., 119(2-3), 164 (2001)
  3. Ogihara T, Ikemoto T, Mizutani N, Kato M, Mitarai Y, J. Mater. Sci., 21, 2771 (1986)
  4. Park SK, Kim KD, Kim HT, J. Ind. Eng. Chem., 6(6), 365 (2000)
  5. Guo XC, Dong P, Langmuir, 15(17), 5535 (1999)
  6. Schrijnemakers K, Impens NREN, Vansant EF, Langmuir, 15(18), 5807 (1999)
  7. Garbassi F, Balducci L, Microporous Mesoporous Mater., 47, 51 (2001)
  8. Fu X, Qutubuddin S, Colloids Surf. A: Physicochem. Eng. Asp., 179, 65 (2001)
  9. Hanprasopwattana A, Srinivasan S, Sault AG, Datye AK, Langmuir, 12(13), 3173 (1996)
  10. Brinker CJ, Scherer GW, Sol-Gel Science, pp. 216-227, Academic Press, San Diego (1990)
  11. Kim KD, Kim HT, Colloids Surf. A: Physicochem. Eng. Asp., 207, 263 (2001)
  12. Chang CL, Fogler HS, Langmuir, 13(13), 3295 (1997)
  13. Chhabra V, Pillai V, Mishra BK, Morrone A, Shah DO, Langmuir, 11(9), 3307 (1995)
  14. Arriagada FJ, Osseo-Asare K, J. Colloid Interface Sci., 211(2), 210 (1999)
  15. Alexandridis P, Holzwarth JF, Hatton TA, J. Phys. Chem., 99(20), 8222 (1995)
  16. Miller JB, Mathers LJ, J. Mater. Chem., 5, 1759 (1995)
  17. Myung JJ, Ph.D. Thesis, Hanyang University, Korea (1997)
  18. Lee MS, Lee GD, Park SS, Hong SS, J. Ind. Eng. Chem., 9(1), 89 (2003)