Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Synthesis and Optical Property of TiO2 Nanoparticles Using a Salt-assisted Ultrasonic Spray Pyrolysis Process

염 보조 초음파 분무 열분해법을 이용한 TiO2 나노입자의 합성 및 광학적 성질

  • Ji, Myeong-Jun (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Park, Woo-Young (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Yoo, Jae-Hyun (Department of Materials Science and Engineering, Seoul National University of Science and Technology) ;
  • Lee, Young-In (Department of Materials Science and Engineering, Seoul National University of Science and Technology)
  • 지명준 (서울과학기술대학교 신소재공학과) ;
  • 박우영 (서울과학기술대학교 신소재공학과) ;
  • 유재현 (서울과학기술대학교 신소재공학과) ;
  • 이영인 (서울과학기술대학교 신소재공학과)
  • Received : 2019.01.31
  • Accepted : 2019.02.22
  • Published : 2019.02.28
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Abstract

Current synthesis processes for titanium dioxide ($TiO_2$) nanoparticles require expensive precursors or templates as well as complex steps and long reaction times. In addition, these processes produce highly agglomerated nanoparticles. In this study, we demonstrate a simple and continuous approach to synthesize $TiO_2$ nanoparticles by a salt-assisted ultrasonic spray pyrolysis method. We also investigate the effect of salt content in a precursor solution on the morphology and size of synthesized products. The synthesized $TiO_2$ nanoparticles are systematically characterized by X-ray diffraction, transmission electron micrograph, and UV-Vis spectroscopy. These nanoparticles appear to have a single anatase phase and a uniform particle-size distribution with an average particle size of approximately 10 nm. By extrapolating the plots of the transformed Kubelka-Munk function versus the absorbed light energy, we determine that the energy band gap of the synthesized $TiO_2$ nanoparticles is 3.25 eV.

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