Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 이선영 | - |
dc.date.accessioned | 2019-11-18T01:47:06Z | - |
dc.date.available | 2019-11-18T01:47:06Z | - |
dc.date.issued | 2019-01 | - |
dc.identifier.citation | CATALYSIS SCIENCE & TECHNOLOGY, v. 9, No. 4, Page. 1004-1012 | en_US |
dc.identifier.issn | 2044-4753 | - |
dc.identifier.issn | 2044-4761 | - |
dc.identifier.uri | https://pubs.rsc.org/en/content/articlehtml/2019/cy/c8cy02318b | - |
dc.identifier.uri | https://repository.hanyang.ac.kr/handle/20.500.11754/112141 | - |
dc.description.abstract | Poor optical absorbance and charge recombination are the major drawbacks of polymeric graphitic carbon nitride (g-C3N4)-based photocatalysts. In this paper, we show for the first time a single-step in situ technique to control the porosity of two-dimensional g-C3N4 sheets and exfoliate them by introducing ascorbic acid (AA) molecules. The AA simultaneously acts as the carbon (C) source and deposits amorphous C onto g-C3N4 sheets. Nanosized pores are also introduced into the g-C3N4 sheets, leading to a large number of active sites. The as-prepared C-doped porous g-C3N4 nanosheets demonstrate a high visible light-photocatalytic H-2 production activity of 793 mol g(-1) with the optimum structure, which is almost 25 times higher than the value obtained with bulk g-C3N4 (31 mol g(-1)). This exceptional photocatalytic performance arises from the C-doped conjugated system and porous nanosheets. The enhanced photocatalytic H-2 evolution was attributed to the effective separation and transport of charge carriers by the deposition of C onto the nanosheets and an increased number of active sites resulting from the nanopores created inside the g-C3N4 sheets. Moreover, molecular dynamics (MD) simulations confirm that the interaction between AA and melamine molecules at elevated temperatures results in the formation of C-doped porous and exfoliated g-C3N4 structures. Therefore, the present approach is very promising for application to the design of new and efficient photocatalysts for photocatalytic H-2 evolution under visible irradiation. | en_US |
dc.description.sponsorship | This work was supported by the Human Resources Development Program (No. 20174030201830) of the Korea Institute of Energy Technology Evaluation and Planning (KETEP) grant funded by the Korean Government Ministry of Trade, Industry and Energy and by a National Research Foundation of Korea (NRF) grant funded by the Korean Government (Ministry of Education) (No. NRF-2016R1D1A1A02936936). | en_US |
dc.language.iso | en_US | en_US |
dc.publisher | ROYAL SOC CHEMISTRY | en_US |
dc.title | In situ reduction and exfoliation of g-C3N4 nanosheets with copious active sites via a thermal approach for effective water splitting | en_US |
dc.type | Article | en_US |
dc.relation.no | 4 | - |
dc.relation.volume | 9 | - |
dc.identifier.doi | 10.1039/c8cy02318b | - |
dc.relation.page | 1004-1012 | - |
dc.relation.journal | CATALYSIS SCIENCE & TECHNOLOGY | - |
dc.contributor.googleauthor | Pawar, Rajendra C. | - |
dc.contributor.googleauthor | Kang, Suhee | - |
dc.contributor.googleauthor | Han, Hyuksu | - |
dc.contributor.googleauthor | Choi, Heechae | - |
dc.contributor.googleauthor | Lee, Caroline S. | - |
dc.relation.code | 2019036206 | - |
dc.sector.campus | E | - |
dc.sector.daehak | COLLEGE OF ENGINEERING SCIENCES[E] | - |
dc.sector.department | DEPARTMENT OF MATERIALS SCIENCE AND CHEMICAL ENGINEERING | - |
dc.identifier.pid | sunyonglee | - |
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