Effect of Heat Treatment Temperatures on Photocatalytic Degradation of Methylene Blue by Mesoporous Titania

메틸렌블루 광촉매 분해반응에서 이산화티타늄 열처리 온도 영향

  • Lim, Samryong (Ulsan Science High School) ;
  • Nguyen-Phan, Thuy-Duong (School of Chemical Engineering and Bioengineering, University of Ulsan) ;
  • Shin, Eun Woo (School of Chemical Engineering and Bioengineering, University of Ulsan)
  • 임삼룡 (울산과학고등학교) ;
  • 웬 판 사이 유엉 (울산대학교 생명화학공학부) ;
  • 신은우 (울산대학교 생명화학공학부)
  • Received : 2010.09.27
  • Accepted : 2010.11.09
  • Published : 2011.02.10

Abstract

In this study, we prepared $TiO_2$ with the sol-gel method and controlled physico-chemical properties by a simple heat treatment. All materials were applied to photocatalytic decomposition of methylene blue and the material treated at 473 K showed the highest photocatalytic efficiency. The high performance resulted from a high adsorption amount of methylene blue due to a high surface area of $229.8m^2/g$. However, the material treated at 873 K, despite of a low surface area of $23.8m^2/g$ and a large particle size of 28.38 nm, exhibits a good photocatalytic performance due to the effect of mixed cyrstalline rutile and anatase phases formed by the high heat treatment temperature.

Acknowledgement

Supported by : 한국연구재단

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