| 학회 |
한국화학공학회 |
| 학술대회 |
2019년 가을 (10/23 ~ 10/25, 대전컨벤션센터) |
| 권호 |
25권 2호, p.1604 |
| 발표분야 |
에너지 환경 (Energy and Environment) |
| 제목 |
Natural Leaf Inspired Z-scheme Photocatalytic CO2 Reduction by 3-Dimensional BiVO4/Carbon-coated Cu2O Nanowire Arrays under Visible Light |
| 초록 |
Most promising and attractive CO2 conversion photocatalysts developed thus far suffer from quite low CO2 photoconversion efficiency due to serious bottlenecks. In this study, we present Z-scheme photocatalyst for carbon dioxide reduction by 3-dimensional BiVO4/carbon coated Cu2O nanowire array which is inspired from natural leaf. 3-D structure enhanced surface area and mass transport and charge transport. High redox potential with significantly decreased electron-hole recombination can be obtained by Z-schematic electron flow between BiVO4 and Cu2O and mediation by ultrathin carbon layer. Also, protecting effect of carbon layer and Z-scheme charge flow induced outstanding photostability of Cu2O that is retention of 98% activity after 20hours reaction. We achieved ~3μmol/g/h CO formation rate in visible light irradiation that is 9.4 and 4.7times higher than those of Cu2O mesh and Cu2O nanowire arrays, respectively. We present characterization with various analysis method and prove Z-scheme charge flow mechanism by using coumarin as a probe molecule. |
| 저자 |
김찬솔, 조경민, 정희태
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| 소속 |
KAIST |
| 키워드 |
에너지 환경 |
| E-Mail |
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| 원문파일 |
초록 보기 |
