In situ reduction and exfoliation of g-C3N4 nanosheets with copious active sites via a thermal approach for effective water splitting
DC Field | Value | Language |
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dc.contributor.author | Pawar, Rajendra C. | - |
dc.contributor.author | Kang, Suhee | - |
dc.contributor.author | Han, Hyuksu | - |
dc.contributor.author | Choi, Heechae | - |
dc.contributor.author | Lee, Sunyong Caroline | - |
dc.date.accessioned | 2021-06-22T10:22:24Z | - |
dc.date.available | 2021-06-22T10:22:24Z | - |
dc.date.created | 2021-01-21 | - |
dc.date.issued | 2019-02 | - |
dc.identifier.issn | 2044-4753 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/erica/handle/2021.sw.erica/3478 | - |
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. | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | Royal Society of Chemistry | - |
dc.title | In situ reduction and exfoliation of g-C3N4 nanosheets with copious active sites via a thermal approach for effective water splitting | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Sunyong Caroline | - |
dc.identifier.doi | 10.1039/c8cy02318b | - |
dc.identifier.scopusid | 2-s2.0-85062025079 | - |
dc.identifier.wosid | 000459893900007 | - |
dc.identifier.bibliographicCitation | Catalysis Science and Technology, v.9, no.4, pp.1004 - 1012 | - |
dc.relation.isPartOf | Catalysis Science and Technology | - |
dc.citation.title | Catalysis Science and Technology | - |
dc.citation.volume | 9 | - |
dc.citation.number | 4 | - |
dc.citation.startPage | 1004 | - |
dc.citation.endPage | 1012 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Chemistry | - |
dc.relation.journalWebOfScienceCategory | Chemistry, Physical | - |
dc.subject.keywordPlus | GRAPHITIC CARBON NITRIDE | - |
dc.subject.keywordPlus | PHOTOCATALYTIC HYDROGEN EVOLUTION | - |
dc.subject.keywordPlus | DOPED G-C3N4 | - |
dc.subject.keywordPlus | CATALYSTS | - |
dc.subject.keywordPlus | FILMS | - |
dc.identifier.url | https://pubs.rsc.org/en/content/articlelanding/2019/CY/C8CY02318B | - |
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