Shape-engineered carbon quantum dots embedded on CdS-nanorods for enhanced visible light harvesting towards photocatalytic application
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Moniruzzaman, M. | - |
dc.contributor.author | Kim, Jongsung | - |
dc.date.accessioned | 2021-07-04T04:41:27Z | - |
dc.date.available | 2021-07-04T04:41:27Z | - |
dc.date.created | 2021-03-22 | - |
dc.date.issued | 2021-06-30 | - |
dc.identifier.issn | 0169-4332 | - |
dc.identifier.uri | https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/81517 | - |
dc.description.abstract | Shape-engineered yellow-emissive carbon quantum dots (Y-CQDs) with discernible edges were synthesized. Three-fold-symmetric benzene-1,3,5-triol was a suitable precursor for controlling the specific structure and shape of CQDs via dehydration-facilitated covalent polymerization in sulfuric acid within 90 min of a thermal reaction at 190 °C. The formation mechanism involves ring cyclization of benzene-1,3,5-triol via a six-membered fashion through elimination of the neighboring active -H and –OH groups. Binary heterostructure nanocomposites, comprising CdS-nanorods (NRs) and Y-CQDs, were prepared using simple sonication followed by solvent evaporation under stirring. The nanocomposite with 6 wt% YCQDs (CdS@Y-CQDs-6) exhibited the highest enhanced photocatalytic degradation of rhodamine B (RhB) with a degradation efficiency of 98% within 45 min, and the degradation rate constant was ~4.8 times higher than that of pristine CdS-NRs under visible light irradiation. The degradation of RhB is carried out through the formation of a green emissive intermediate N-deethylated RhB. The improved photocatalytic degradation performance of CdS@Y-CQDs nanocomposites is attributed to the formation of near-surface heterojunction of surface-adsorbed specific-shaped Y-CQDs, which can widen the range of light absorption and promote the separation of photogenerated electron-hole pairs in CdS-NRs by trapping and boosting the transfer of photo excited charge carriers over the surface. © 2021 | - |
dc.language | 영어 | - |
dc.language.iso | en | - |
dc.publisher | ELSEVIER | - |
dc.relation.isPartOf | Applied Surface Science | - |
dc.title | Shape-engineered carbon quantum dots embedded on CdS-nanorods for enhanced visible light harvesting towards photocatalytic application | - |
dc.type | Article | - |
dc.type.rims | ART | - |
dc.description.journalClass | 1 | - |
dc.identifier.wosid | 000639694000005 | - |
dc.identifier.doi | 10.1016/j.apsusc.2021.149372 | - |
dc.identifier.bibliographicCitation | Applied Surface Science, v.552 | - |
dc.description.isOpenAccess | N | - |
dc.identifier.scopusid | 2-s2.0-85102472188 | - |
dc.citation.title | Applied Surface Science | - |
dc.citation.volume | 552 | - |
dc.contributor.affiliatedAuthor | Moniruzzaman, M. | - |
dc.contributor.affiliatedAuthor | Kim, Jongsung | - |
dc.type.docType | Article | - |
dc.subject.keywordAuthor | CdS nanorods | - |
dc.subject.keywordAuthor | Nanocomposites | - |
dc.subject.keywordAuthor | Photocatalysis | - |
dc.subject.keywordAuthor | Specific-shaped (quadrilateral and trilateral) CQDs | - |
dc.subject.keywordAuthor | Yellow emission | - |
dc.subject.keywordPlus | Benzene | - |
dc.subject.keywordPlus | Cadmium sulfide | - |
dc.subject.keywordPlus | Carbon | - |
dc.subject.keywordPlus | Degradation | - |
dc.subject.keywordPlus | Heterojunctions | - |
dc.subject.keywordPlus | Image enhancement | - |
dc.subject.keywordPlus | Light | - |
dc.subject.keywordPlus | Light absorption | - |
dc.subject.keywordPlus | Nanocomposites | - |
dc.subject.keywordPlus | Nanocrystals | - |
dc.subject.keywordPlus | Nanorods | - |
dc.subject.keywordPlus | Photocatalytic activity | - |
dc.subject.keywordPlus | Rate constants | - |
dc.subject.keywordPlus | Rhodium compounds | - |
dc.subject.keywordPlus | Semiconductor quantum dots | - |
dc.subject.keywordPlus | Carbon quantum dots | - |
dc.subject.keywordPlus | CdS | - |
dc.subject.keywordPlus | CdS nanorod | - |
dc.subject.keywordPlus | Light-harvesting | - |
dc.subject.keywordPlus | Photo catalytic degradation | - |
dc.subject.keywordPlus | Photocatalytic application | - |
dc.subject.keywordPlus | Rhodamine-B | - |
dc.subject.keywordPlus | Specific-shaped (quadrilateral and trilateral) CQD | - |
dc.subject.keywordPlus | Visible light | - |
dc.subject.keywordPlus | Yellow emissions | - |
dc.subject.keywordPlus | II-VI semiconductors | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
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