| 학회 |
한국화학공학회 |
| 학술대회 |
2007년 가을 (10/26 ~ 10/27, 한국과학기술원) |
| 권호 |
13권 2호, p.2521 |
| 발표분야 |
촉매 및 반응공학 |
| 제목 |
Enhanced photocatalytic properties of electron rich W-doped PbBi2Nb2O9 layered perovskite material under visible light irradiation |
| 초록 |
The substitution effect of W6+ at Nb5+ site in PbBi2Nb2O9, a layered Aurivillius-phase perovskite system, has been studied and further optimized to fabricate an efficient photocatalyst. The material doped with electron donor (W+6), PbBi2Nb2-xWxO9 with an optimum composition of x=0.15 exhibited a red shifted (0.14eV) band gap, generated two times higher photocurrent, and showed analogous higher quantum yield for photodecomposition of H2O/CH3OH solution than undoped material under visible light (λ≥420nm). In contrast, the material doped with hole donor (Ti+4) revealed deteriorated photochemical properties. The higher electron density by n-type doping seems to be responsible for the more efficient charge separation in PbBi2Nb2-xWxO9 (0＜x＜0.5). |
| 저자 |
김현규1, 장점석2, 지상민2, 배상원2, 정의덕1, 유성미1, 이재성2
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| 소속 |
1한국기초과학지원(연), 2포항공과대 |
| 키워드 |
perovskite; photoelectrochemical; photocatalysis; solar energy material
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| E-Mail |
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| 원문파일 |
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