Korean Chemical Engineering Research

The Korean Institute of Chemical Engineers (한국화학공학회)
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Synthesis of Titanium Dioxides from Peroxotitanate Solution Using Hydrothermal Method and Their Photocatalytic Decomposition of Methylene Blue

수열합성법에 의한 과산화티탄 수용액으로부터 이산화티탄의 합성 및 메틸렌블루의 광분해반응

  • Jung, Won Young (Department of Chemical Engineering, Pukyong National University) ;
  • Lee, Seung Ho (Composite Materials Lab., Korea Institute of Ceramic Engineering & Technology) ;
  • Kim, Dae Sung (Composite Materials Lab., Korea Institute of Ceramic Engineering & Technology) ;
  • Lee, Gun Dae (Department of Chemical Engineering, Pukyong National University) ;
  • Park, Seong Soo (Department of Chemical Engineering, Pukyong National University) ;
  • Hong, Seong-Soo (Department of Chemical Engineering, Pukyong National University)
  • 정원영 (부경대학교 화학공학과) ;
  • 이승호 (한국세라믹기술연구원, 에코복합소재센터) ;
  • 김대성 (한국세라믹기술연구원, 에코복합소재센터) ;
  • 이근대 (부경대학교 화학공학과) ;
  • 박성수 (부경대학교 화학공학과) ;
  • 홍성수 (부경대학교 화학공학과)
  • Received : 2010.03.08
  • Accepted : 2010.04.05
  • Published : 2010.08.31
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Abstract

Nanosized $TiO_2$ particles were prepared by hydrothermal method from the aqueous peroxotitanate solution using the different carboxylic acids as an additives. The physical properties of prepared nanosized $TiO_2$ particles were investigated and we also examined the activity of $TiO_2$ particles as a photocatalyst on the decomposition of methylene blue. The major phase of all the prepared $TiO_2$ particles was an anatase structure regardless of carboxylic acids and a rutile peak was observed above $700^{\circ}C$. The photocatalytic activity increased with an increase of hydrocarbon number of carboxylic compounds and the highest activity was shown on the catalysts which was prepared using succinic acid as an additive and calcined at $500^{\circ}C$.

서로 다른 관능기를 가진 카르복시산 화합물을 첨가제로 하여 과산화티탄 수용액으로부터 수열합성법으로 나노 크기의 이산화티탄을 제조하였다. 제조된 나노 크기의 이산화티탄의 물리적 성질을 조사하였으며, 이들을 사용하여 메틸렌블루의 광분해 반응에서의 활성을 조사하였다. 첨가된 카르복시산 화합물에 관계없이 아나타제형 나노 크기의 이산화티탄이 합성되었으며, 소성온도가 $700^{\circ}C$ 이상에서는 아나타제 결정구조가 루틸 결정구조로 변환되기 시작하였다. 광촉매 반응의 활성은 카르복시산의 탄소수가 커질수록 증가하였으며, 숙신산을 첨가제로 한 경우와 $500^{\circ}C$에서 소성시킨 경우에 가장 높은 활성을 보여주었다.

Keywords

References

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