화학공학소재연구정보센터
Korean Journal of Materials Research, Vol.22, No.10, 526-530, October, 2012
Preparation of SiO2-CuO-CeO2 Composite Powders and Its Thin Film Templated with Oxalic Acid
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Silica-based ceramic-matrix composites have shown promise as advanced materials for many applications such as chemical catalysts, ceramics, pharmaceuticals, and electronics. SiO2-CuO-CeO2 multi-component powders and their thin film, using an oxalic acid template as a chelating agent, have larger surface areas and more uniform pore size distribution than those of inorganic acid catalysts. SiO2-CuO-CeO2 composite powders were synthesized using tetraethylorthosilicate, copper (II) nitrate hemi (pentahydrate), and cerium (III) nitrate hexahydrate with oxalic acid as template or pore-forming agent. The process of thermal evolution, the phase composition, and the surface morphology of these powders were monitored by thermogravimetrydifferential thermal analysis (TG-DTA), X-ray diffractometry (XRD), field-emission scanning electron microscopy (FE-SEM), and energy dispersive X-ray spectrometry (EDXS). The mesoporous property of the powders was observed by Brunner-Emmett- Teller surface (BET) analysis. The improved surface area of this powder template with oxalic acid was 371.4 m2/g. This multicomponent thin film on stainless-steel was prepared by sol-gel dip coating with no cracks.
  1. Yun YL, Ju WH, Chem. Ind. Technol., 16(2), 98 (1998)
  2. Hwang K, Ko H, Yeu T, J. Korean Ind. Eng. Chem., 11(5), 495 (2000)
  3. Kim HH, Park H, Kim KN, Korean J. Mater. Res., 20(5), 252 (2010)
  4. Deng YH, Wang CC, Hu JH, Yang WL, Fu SK, Colloid. Surface. Physicochem. Eng. Aspect., 262, 87 (2005)
  5. Dupont A, Parent C, Le Garrec B, Heintz JM, J. Solid State Chem., 171, 152 (2003)
  6. Pileni MP, J. Phys. Chem. B, 105(17), 3358 (2001)
  7. Khoabane K, Mokoena EM, Coville NJ, Microporous Mesoporous Mater., 83, 67 (2005)