Applied Chemistry for Engineering (공업화학)

The Korean Society of Industrial and Engineering Chemistry (한국공업화학회)
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Visible Light Responsive Titanium Dioxide (TiO2)

가시광 감응 산화티탄(TiO2)

  • Shon, Hokyong (Faculty of Engineering, University of Technology) ;
  • Phuntsho, Sherub (Faculty of Engineering, University of Technology) ;
  • Okour, Yousef (Faculty of Engineering, University of Technology) ;
  • Cho, Dong-Lyun (School of Applied Chemical Engineering & The Research Institute for Catalysis, Chonnam National University) ;
  • Kim, Kyoung Seok (School of Applied Chemical Engineering & The Research Institute for Catalysis, Chonnam National University) ;
  • Li, Hui-Jie (School of Applied Chemical Engineering & The Research Institute for Catalysis, Chonnam National University) ;
  • Na, Sukhyun (School of Applied Chemical Engineering & The Research Institute for Catalysis, Chonnam National University) ;
  • Kim, Jong Beom (School of Applied Chemical Engineering & The Research Institute for Catalysis, Chonnam National University) ;
  • Kim, Jong-Ho (School of Applied Chemical Engineering & The Research Institute for Catalysis, Chonnam National University)
  • 손호경 (시드니공과대학교 환경공학부) ;
  • ;
  • ;
  • 조동련 (전남대학교 응용화학공학부 촉매연구소) ;
  • 김경석 (전남대학교 응용화학공학부 촉매연구소) ;
  • 이휘지 (전남대학교 응용화학공학부 촉매연구소) ;
  • 나숙현 (전남대학교 응용화학공학부 촉매연구소) ;
  • 김종범 (전남대학교 응용화학공학부 촉매연구소) ;
  • 김종호 (전남대학교 응용화학공학부 촉매연구소)
  • Received : 2008.01.25
  • Published : 2008.02.10
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Abstract

Titanium dioxide ($TiO_2$) is one of the most researched semiconductor oxides that has revolutionised technologies in the field of environmental purification and energy generation. It has found extensive applications in heterogenous photocatalysis for removing organic pollutants from air and water and also in hydrogen production from photocatalytic water-splitting. Its use is popular because of its low cost, low toxicity, high chemical and thermal stability. But one of the critical limitations of $TiO_2$ as photocatalyst is its poor response to visible light. Several attempts have been made to modify the surface and electronic structures of $TiO_2$ to enhance its activity in the visible light region such as noble metal deposition, metal ion loading, cationic and anionic doping and sensitisation. Most of the results improved photocatalytic performance under visible light irradiation. This paper attempts to review and update some of the information on the $TiO_2$ photocatalytic technology and its accomplishment towards visible light region.

산화티탄은 가장 많이 연구된 반도체 산화물로 환경 정화와 에너지 생산에 응용이 크게 기대되고 있다. 공기와 물 속의 유해 유기물을 제거하고 물분해를 통한 수소 생산은 대표적인 응용 분야이다. 산화티탄의 저렴한 가격, 낮은 독성, 화학적 및 열적 안정성은 잘 알려진 장점이다. 그러나, 산화티탄의 단점은 가시광 영역에서 광촉매 활성이 낮다는 점이다. 이러한 문제점을 해결하기 위하여, 귀금속, 금속, 양이온, 음이온 도핑 방법으로 산화티탄의 표면과 전기적 구조를 변형시켜 가시광 영역에서 광촉매 활성을 높이기 위한 연구가 많이 진행되고 있다. 이번 총설에서는 산화티탄의 가시광 감응을 유도하는 방법에 대한 광범위한 정보를 정리하였다.

Keywords

Acknowledgement

Supported by : Chonnam National University

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