한국결정성장학회지 (Journal of the Korean Crystal Growth and Crystal Technology)

  • 제12권2호
  • /
  • Pages.91-95
  • /
  • 2002
  • /
  • 1225-1429(pISSN)
  • /
  • 2234-5078(eISSN)
한국결정성장학회 (The Korea Association of Crystal Growth)
권호 표지

Titanium tetra-isopropoxide를 이용한 $TiO_2$ Nanopowder 제초와 pH의 영향

Preparation of $TiO_2$ nanopowder using titanium tetra-isopropoxide and effect of pH

  • 임창성 (한서대학교 신소재공학과) ;
  • 오원춘 (한서대학교 신소재공학과) ;
  • 류정호 (한양대학교 세라믹공학과) ;
  • 오근호 (한양대학교 세라믹공학과)
  • 발행 : 2002.04.01
PDF 다운로드
⟨ 이전 논문 다음 논문 ⟩

초록

Titannium tetra-isoporpoxide의 가수분해 반응을 이용하여 nanosize의 $TiO_2$powder를 합성하고, 가수분해 반응에 있어서 촉매로 사용되는 HCI과 $NH_4$OH의 첨가량에 따른 반응양상과 생성된 $TiO_2$분말의 특성의 변화를 조사하였다. 염기성 촉매인 $NH_4$OH,를 사용하였을 경우에 균질한 형상의 powder 형태의 $TiO_2$를 합성할 수 있었으며, 산성 촉매인 HCI을 사 용하여 p보가 5.04 이하일 경우에는 괴상이나 과립의 형태로 생성되었다. 사용한 촉매의 종류와 양에 따라 저온의 결정상인 anatase의 생성속도와 보다 안정한 rutile상으로의 상전이 속도가 영향을 받았다.

$TiO_2$ nanopowder was successfully prepared using a titanium tetra-isopropoxide. Subsequently, the effect of pH on the characteristics of the prepared $TiO_2$ nanopowder was evaluated depending on the amounts of the catalysts such as HCI and NH40H. The morphology and phase transformation of $TiO_2$ powder prepared by hydrolysis of titanium tetraisopropoxide were strongly influenced by the presence of the catalysts. In the case of using $NH_4$OH, the morphology of the $TiO_2$ powder exhibited powder form. For the HCI catalyst, it showed bulk or granule form. The phase transformations of amorphous $Ti(OH)_4$ to anatase $TiO_2$ and the anatase to rutile was significantly influenced by the kind and amount of the catalysts.

키워드

참고문헌

  1. J. Phys. Chem. v.99 Subnanosecond relaxation dynamics in TiO₂colloidal sols (Particle Sizes Rp = 1.0~13.4 ㎚), relevant to heterogeneous photocatalysis N. Serpone;D. Lawless;R. Khairutdinov https://doi.org/10.1021/j100045a027
  2. J. Catalysis v.158 Photocatalyticdegradation of 1-octanol on anchored titanium oxide and on T₁O₂powder catalysis H. Yamashita;Y. Ichihashi;M. Harada;G. Stewart;M.A. Fox;M. Anpo https://doi.org/10.1006/jcat.1996.0010
  3. J. Photochem. Photobiol. A : Chem. v.101 Photocatalytic water treatment on immobilized TiO₂combined with ozonation K. Tanaka;K. Abe;T. Hisanaga https://doi.org/10.1016/S1010-6030(96)04393-6
  4. Environ. Sci. Technol. v.28 no.3 Phtoelectrocatalytic degradation of formic acid using a porous TiO₂thin film electrode D.H. Kim;M.A. Anderson https://doi.org/10.1021/es00052a021
  5. J. Mat. Sci. v.29 Crystal structure of TiO₂thin coatings prepared from the alkoxede solution via the dip-coating aqueous acetic acid K. Kato;A. Tsuzuki;H. Taoda;Y. Torii;T. Kato;Y. Bustsugan https://doi.org/10.1007/BF00366875
  6. J. Mat. Sci. v.29 Crystal structure of TiO₂thin coatings prepared from the alkoxede solution via the dip-coating aqueous acetic acid K. Kato;A. Tsuzuki;H. Taoda;Y. Torii;T. Kato;Y. Bustsugan https://doi.org/10.1007/BF00366875
  7. Anal Chem. v.29 Quantitative analysis fo anatase-rutile mixure with an X-ray diffractometer R.A. Spurr;H. Myers https://doi.org/10.1021/ac60125a006
  8. J. Mater. Chem. v.3 Textural evolution and phase transformation in titania membranes : part 1. unsupported membranes K.-N.P. Kumar;K. Keizer;A.J. Burggraaf https://doi.org/10.1039/jm9930301141
  9. J. Mater. Sci. Lett. v.15 Grain size dependence of anatase to rutile structural transformation in gel-derived nanocrystalline titania powder X.Z. Ding;X.H. Liu;Y.Z. He https://doi.org/10.1007/BF00275343
  10. Proceedings of ISES Solar World Congress Budapest The photocatalytic destruction of trichloroethylene and phenol in aqueous system Tai, K. Lee;D.H. Kim;Suh, H. Cho;P.C. Auh;J.W. Yang