Preparation of TiO2-SiO2 Powder by Modified Sol-Gel Method and their Photocatalytic Activities

수식 졸-겔법에 의한 TiO2-SiO2분체합성 및 광촉매활성

  • Kim, Byung-Kwan (Dept. of Chemical Technology, Changwon National Univ) ;
  • Mizuno, Noritaka (Institute of Industrial Science, University of Tokyo) ;
  • Yasui, Itaru (Institute of Industrial Science, University of Tokyo)
  • Received : 1996.04.23
  • Accepted : 1996.09.30
  • Published : 1996.12.10


Various $TiO_2-SiO_2$ composite powders were prepared by the modified sol-gel method using 1-dodecanol as DCCA (Dryng Control Chemical Additive ). Their characterizations were carried out and their photocatalytic catalysis was examined on the evolution reaction of hydrogen. The weight losses at $500^{\circ}C$ of only $TiO_2$ and $SiO_2$ powders were 33. 0wt% and 42.5wt%, respectively, and those of the $TiO_2/SiO_2$ powders ($TiO_2/SiO_2=25/75$, 50/50 and 75/25) were about $70.0{\pm}3.0wt%$. The released substances from the powders were almost organic matters. The as-prepared powders except only $TiO_2$ powder were amorphous. Transformation of anatase to rutil was hindered by $SiO_2$ component and the crystallinity of anatase was decreased with increasing $SiO_2$ contents. The as-prepared powders were bulky states. By heating at $600^{\circ}C$ for 1 hr $TiO_2-SiO_2$ powders ($TiO_2=100%$, $TiO_2/SiO_2=75/25,\;50/50$) showed agglomerates consisted of particles in submicron, but those of $TiO_2/SiO_2=25/75$ and $SiO_2=100%$ were still bulky states. Specific surface area of the powders heat-treated at $600^{\circ}C$ for 1hr was increased with $SiO_2$ concents and their pore sizes were also depended on $SiO_2$ contents. The photocatalytic activity of $TiO_2/SiO_2=75/25$ heat-treated at $600^{\circ}C$ for 1hr was 0.240mo1/h.g-cat as $H_2$ evolution rate. This value was about 2.0 times that of P-25(Degussa P-25) as a standard photocatalyst.



  1. 공업화학 v.6 김병관;김종향
  2. 대한환경공학회지 v.17 양종규;김종향;김병관
  3. Environ. Sci. Technol. v.25 G. K.-C. Low;S. R. McEvoy;R. W. Mathews
  4. Chemosphere v.18 E. Pelzzetti;V. Maurino;C. Minero;O. Zerbinati;E. Borgarello
  5. The First International Conference on TiO₂Photocatalytic Purification and Treatment of Water and Air P. Pichat;J.-C. D. Oliverira;J.-F. Maffre;D. Mas.
  6. New J. Chem. v.15 E. Pelizzetti;C. Carlin;C. Minero;M. Gratzel
  7. Chemosphere v.17 E. Pelizzetti;M. Borgarello;C. Minero;E. Pramauro;E. Borgarello;N. Serpone
  8. J. Cat. v.102 A. Kudo;A. Tanaka;K. Domen;K. Maruya;K. Aika;T. Onishi
  9. 觸媒 v.33 佐藤眞理
  10. J. Chem. Soc., Chem. Comm. T. Kawai;T. Sakada
  11. Nature v.286 T. Kawai;T. Sakada
  12. 觸媒 v.30 佐藤眞理
  13. J. Am. Chem. Soc. v.103 E. Borgarello;J. Kiwi;E. Pelizzetti;M. Gratzel
  14. J. Am. Chem. Soc. v.105 J. Moser;M. Gratzel
  15. J. Non-cryst. Solids v.105 G. Orcel;L. L. Hench;I. Artaki;J. Jonas;T. W. Zerda
  16. J. Non-cryst. Solids v.109 A. H. Boonstra;T. N. M. Bernards;J. J. T. Smits
  17. J. Non-cryst. Solids v.99 T. Adachi;S. Sakka
  18. 窯業協會誌 v.95 足立龍彦;作花濟夫;岡田正夫
  19. 窯業協會誌 v.94 大野正善;山田武;高戶範夫
  20. Am. Ceram. Soc. Bull. v.54 B. E. Yoldas
  21. Colloids and Surfaces v.12 J. H. A. Van Der Woude;P. O. DeBruyn
  22. Thin Solid Films v.81 R. L. Nelson;J. D. F. Ramsay;J. L. Woodhead;J. A. Cairns;J. A. A. Crassley
  23. Appl. Optics v.29 D. P. Partlow;T. W. O'Keeffe
  24. Thin Solid Films v.175 H. G. Floch;J.-J. Priotton;I. M. Thomas
  25. Appl. Optics v.19 B. E. Yoldas
  26. 窯業協會誌 v.86 神谷寬一;作花濟夫;水谷通利
  27. 日本化學會誌 神谷寬一;作花濟夫
  28. 觸媒 v.33 T. M. Salama;山口力
  29. 日本化學會誌 頓行宏;伊舟正郞;堀田和彦;河本洋二
  30. 日本化學會誌 山口經一;佐藤眞理