Particle and aerosol research (한국입자에어로졸학회지)

Korean Association for Particle and Aerosol Research (한국입자에어로졸학회)
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Preparation of Nanoporous Silica Particles containing Various Pore Sizes from Silicic Acid by Spray Pyrolysis

분무열분해 공정에 의한 규산수용액으로부터 다양한 미세기공을 갖는 실리카 나노다공체 제조

  • Kim, Sun Kyung (Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Lee, Chongmin (Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Chang, Hankwon (Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources) ;
  • Jang, Hee Dong (Resources Utilization Research Center, Korea Institute of Geoscience and Mineral Resources)
  • 김선경 (한국지질자원연구원 자원활용연구센터) ;
  • 이총민 (한국지질자원연구원 자원활용연구센터) ;
  • 장한권 (한국지질자원연구원 자원활용연구센터) ;
  • 장희동 (한국지질자원연구원 자원활용연구센터)
  • Received : 2016.03.24
  • Accepted : 2016.09.18
  • Published : 2016.09.30
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Abstract

Nanoporous $SiO_2$ particles containing different pore volume and size were prepared from silicic acid by a spray pyrolysis. The pore size, pore volume and particle size could be controlled with varying the precursor concentration, reaction temperature, and amount of organic templates such as Urea and poly ethylene glycol (PEG). The pore size distribution, pore volume and specific surface area of as-prepared particles were analyzed by BET and BJH methods, and the average particle sizes were measured by a laser diffraction method. The nanoporous $SiO_2$ particles ranged $0.6-0.9{\mu}m$ in diameter were successfully synthesized and the average particle size increased as the silicic acid concentration increased. The morphology of nanoporous $SiO_2$ particles was spherical and pores ranged 1 - 40 nm in diameter were measured in the particles. In case of Urea added into silicic acid, it showed no much difference in the morphology, pore size and pore volume at different Urea concentration. On the other hand, when PEG was added, it was clearly observed that pore diameter and pore volume of the particles surface increased with respect to PEG concentration.

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References

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