Journal of Powder Materials (한국분말재료학회지)

The Korean Powder Metallurgy & Materials Institute (한국분말재료학회 (*구 분말야금학회))
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Photocatalytic and Adsorption Properties of WO3 Nanorods Prepared by Hydrothermal Synthesis

수열합성법으로 제조된 나노막대 구조 WO3의 광촉매 효과 및 염료 흡착 반응

  • Yu, Su-Yeol (Department of Applied Physics, Hannam University) ;
  • Nam, Chunghee (Department of Applied Physics, Hannam University)
  • 유수열 (한남대학교 광.전자물리학과) ;
  • 남충희 (한남대학교 광.전자물리학과)
  • Received : 2017.12.07
  • Accepted : 2017.12.26
  • Published : 2017.12.28
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Abstract

Transition-metal oxide semiconductors have various band gaps. Therefore, many studies have been conducted in various application fields. Among these, methods for the adsorption of organic dyes and utilization of photocatalytic properties have been developed using various metal oxides. In this study, the adsorption and photocatalytic effects of $WO_3$ nanomaterials prepared by hydrothermal synthesis are investigated, with citric acid added in the hydrothermal process as a structure-directing agent. The nanostructures of $WO_3$ are studied using transmission electron microscopy and scanning electron microscopy images. The crystal structure is investigated using X-ray diffraction patterns, and the changes in the dye concentrations adsorbed on $WO_3$ nanorods are measured with a UV-visible absorption spectrophotometer based on Beer-Lambert's law. The methylene blue (MB) dye solution is subjected to acid or base conditions to monitor the change in the maximum adsorption amount in relation to the pH. The maximum adsorption capacity is observed at pH 3. In addition to the dye adsorption, UV irradiation is carried out to investigate the decomposition of the MB dye as a result of photocatalytic effects. Significant photocatalytic properties are observed and compared with the adsorption effects for dye removal.

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