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2007 Vol.44, Issue 6 Preview Page
31 December 2007. pp. 541-547
Abstract
Titanium dioxide (TiO2) nanoparticles consisted of spherical primary nanoparticles were synthesized from titanium tetraisopropoxide (TTIP) by flame spray pyrolysis. The effect of precursor molar concentration on the powder properties such as morphology, specific surface area, crystal structure, and absorption of ultraviolet-visible rays was investigated. As the precursor concentration increased from 0.1 M to 1.0 M, the specific surface area decreased from 126 m2/g to 25 m2/g, corresponding average particle diameter increased 12 nm to 60 nm, and the mass fraction of rutile in the TiO2 particles increased from 0% to 33%. Photocatalytic property of as-prepared TiO2 nanoparticles was also investigated by measuring the degree of color-removal of methylene blue under the irradiation of ultraviolet ray. By the photocatalysis of TiO2 nanoparticles prepared at 1.0 M of TTIP concentration, 96% of the methylene blue was degraded during 1 hr.
화염분무열분해법을 이용하여 titanium tetraisopropoxide(TTIP) 용액으로부터 구형의 기본입자로 구성된 이산화티타늄 나노분말을 합성하였다. 전구체 몰농도가 분말의 형상, 비표면적, 결정구조 및 자외선 흡수와 같은 분말특성에 미치는 영향을 고찰하였다. 전구체 몰농도가 0.1 M에서 1.0 M로 증가함에 따라, 비표면적은 126 m2/g에서 25 m2/g으로 감소하였고 이에 해당하는 평균입경은 12 nm에서 60 nm로 증가하였다. 그리고 TiO2 분말 중 rutile 결정상의 함량은 0%에서 33%로 증가하였다. 자외선 조사 하에서 메틸렌 블루의 색 제거율을 측정함으로써 합성된 TiO2 나노분말의 광촉매 특성을 조사하였다. 1.0 M의 TTIP 농도에서 합성된 TiO2 나노분말의 경우 광촉매 반응을 통하여 1시간 동안에 96%의 메틸렌 블루를 분해하였다.
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Information
  • Publisher :The Korean Society of Mineral and Energy Resources Engineers
  • Publisher(Ko) :한국자원공학회
  • Journal Title :Journal of the Korean Society for Geosystem Engineering
  • Journal Title(Ko) :한국지구시스템공학회지
  • Volume : 44
  • No :6
  • Pages :541-547