| 학회 |
한국공업화학회 |
| 학술대회 |
2015년 봄 (04/29 ~ 05/01, BEXCO (부산)) |
| 권호 |
19권 1호 |
| 발표분야 |
고분자_포스터 |
| 제목 |
Soft-Template-Carbonization Route to Highly Textured Mesoporous Carbon-TiO2 Inverse Opals for Efficient Photocatalytic and Photoelectrochemical Applications |
| 초록 |
TiO2 has been recognized as representative metal oxide semiconductor material with excellent photocatalytic activity due to its good stability, nontoxicity, and UV absorbance. However, the lack of visible light activity has been a critical issue due to the relatively large band gap. In this work, hierarchically organized mesoporous carbon-TiO2 inverse opal nanostructures were synthesized by complementary colloid and block copolymer (BCP) self-assembly, where the triblock copolymer P123 acts simultaneously as template and carbon source. Highly ordered mesoporous inverse opal nanostructures with nano-textured surface morphology and multiple-length scale nanopores provide increased light-activated surface area and scattering effects, leading to enhanced photoabsorption efficiency and the transport of matters. UV-vis absorption and X-ray photoelectron spectroscopy studies show that incorporation of carbon moieties into TiO2 via direct conversion of BCPs creates a new energy level above the valence band of TiO2, resulting in an effective decrease in the band gap. A significant enhanced visible light photocatalytic activity was demonstrated for the mesoporous carbon-TiO2 inverse opals in terms of the degradation of p-nitrophenol and photoelectrochemical water splitting. |
| 저자 |
Li Na Quan, 장윤희, 장유진, 사지 토마스, 김동하
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| 소속 |
이화여자대 |
| 키워드 |
Photocatalytic Activity; Photoelectrochemical Activity; Mesoporous Carbon-TiO2 Inverse Opals
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| E-Mail |
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