Synthesis of Porous TiO2-SiO2 Particles by Self-assembly of Nanoparticles

나노입자들의 자기조립에 의한 TiO2-SiO2 다공체 제조

  • Oh, Kyoung Joon (Industrial Materials Research Department, Korea Institute of Geoscience and mineral Resources) ;
  • Kim, Sun Kyung (Industrial Materials Research Department, Korea Institute of Geoscience and mineral Resources) ;
  • Chang, Hankwon (Industrial Materials Research Department, Korea Institute of Geoscience and mineral Resources) ;
  • Jang, Hee Dong (Industrial Materials Research Department, Korea Institute of Geoscience and mineral Resources)
  • 오경준 (한국지질자원연구원 산업원료화연구실) ;
  • 김선경 (한국지질자원연구원 산업원료화연구실) ;
  • 장한권 (한국지질자원연구원 산업원료화연구실) ;
  • 장희동 (한국지질자원연구원 산업원료화연구실)
  • Received : 2011.07.27
  • Accepted : 2011.09.27
  • Published : 2011.09.30

Abstract

Porous $TiO_2-SiO_2$ particles were synthesized by co-assembly of nanoparticles of $TiO_2$ and $SiO_2$ in evaporating aerosol droplets. Poly styrene latex (PSL) particles were employed as a template of porous particles. Flowrate of dispersion gas, weight ratio of $TiO_2/SiO_2$ and $SiO_2$ concentration in the precursor, and PSL size were chosen as process variables. The morphology, crystal structure, chemical bonding, and pore size distribution were analyzed by FE-SEM, XRD, FT-IR, BET. The morphology of porous $TiO_2-SiO_2$ particles was spherical and the average particle size range were from 1 to $10{\mu}m$. The particles were composed of meso and macro pores. The average particle diameter and pore volume of the as prepared particles were dependant on process variables. It was found that UV-Vis absorption of the porous particles was comparable with pure $TiO_2$ nanoparticles even though $TiO_2/SiO_2$ ratio is low in the porous particles.

Acknowledgement

Grant : 광물자원으로부터 나노소재의 원료물질 제조 기술

Supported by : 한국지질자원연구원

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