| 학회 |
한국화학공학회 |
| 학술대회 |
2010년 가을 (10/21 ~ 10/22, 대전컨벤션센터) |
| 권호 |
16권 2호, p.2326 |
| 발표분야 |
환경 |
| 제목 |
Visible Photocatalytic Activities of Platinized WO3: The Generation and Role of OH Radicals |
| 초록 |
This study aims to understand the visible light photocatalytic activities of platinized WO3 (Pt/WO3) on the degradation of aquatic pollutants and the role of main photooxidants. The presence of Pt on WO3 is known to facilitate the multi-electron reduction of O2, which enables O2 to serve as an electron acceptor despite the insufficient reduction potential of the conduction band electrons (in WO3) for the one-electron reduction of O2. The concurrent oxidative reactions occurring on WO3 was markedly enhanced in the presence of Pt and accompanied the production of OH radicals under visible light, which was confirmed by both a fluorescence method (using a chemical trap) and a spin trap method. The generation of OH radicals mainly comes from the reductive decomposition of H2O2 that is produced in situ from the reduction of O2 on Pt/WO3. The rate of in-situ production of H2O2 under visible light was significantly faster with Pt/WO3 than WO3. |
| 저자 |
김정원, 최원용
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| 소속 |
포항공과대 |
| 키워드 |
visible-light photocatalyst; platinized WO3; OH radical
|
| E-Mail |
|
| 원문파일 |
초록 보기 |
