DC Field | Value | Language |
---|---|---|
dc.contributor.author | Hong, Inju | - |
dc.contributor.author | Moon, Hyun Sik | - |
dc.contributor.author | Park, Byoung Joon | - |
dc.contributor.author | Chen, Yi-An | - |
dc.contributor.author | Chang, Yu-Peng | - |
dc.contributor.author | Song, Byeongju | - |
dc.contributor.author | Lee, Dongmin | - |
dc.contributor.author | 윤용주 | - |
dc.contributor.author | Hsu, Yung-Jung | - |
dc.contributor.author | Han, Jeong Woo | - |
dc.contributor.author | Yong, Kijung | - |
dc.date.accessioned | 2024-03-06T01:40:23Z | - |
dc.date.available | 2024-03-06T01:40:23Z | - |
dc.date.created | 2024-02-29 | - |
dc.date.issued | 2024-03 | - |
dc.identifier.issn | 1385-8947 | - |
dc.identifier.uri | https://oasis.postech.ac.kr/handle/2014.oak/121404 | - |
dc.description.abstract | Photocatalytic nitrate reduction to ammonia (PcNRA) not only tackles nitrate pollution in wastewater but also transforms it into valuable ammonia, attracting attention as an eco-friendly and carbon-free ammonia synthesis technology. However, it still suffers from insufficient ammonia selectivity due to active side reactions such as nitrogen gas formation and hydrogen production. In this work, we synthesized B-doped and N-deficient g-C3N4 (NVCN) by thermal treatment using NaBH4 as a reduction reagent for selective photocatalytic nitrate-ammonia conversion. The simultaneous introduction of B dopants and nitrogen vacancies (NVs) into the g-C3N4 (CN) framework modulated the band structure: the narrowed band gap and the generated mid-gap states suppressed charge carrier recombination and allowed more electrons to participate in the reduction reaction, while the reduced conduction band energy effectively inhibited hydrogen evolution, defining possible reaction pathways to nitrate reduction. Moreover, nitrate species were strongly adsorbed and activated on the catalyst surface in the co-presence of B dopants and NVs, which consequently facilitated selective and active nitrate-to-ammonia conversion. The optimal catalyst, NVCN475, achieved exceptional ammonia selectivity (96.9 %) and production activity (8.83 μmol h−1) with negligible H2 evolution (0.52 μmol h−1) under visible light irradiation. | - |
dc.language | English | - |
dc.publisher | Elsevier BV | - |
dc.relation.isPartOf | Chemical Engineering Journal | - |
dc.title | Band alignment modulation of g-C3N4 by tuning structural defects for selective ammonia photosynthesis from nitrate reduction under visible light irradiation | - |
dc.type | Article | - |
dc.identifier.doi | 10.1016/j.cej.2024.149506 | - |
dc.type.rims | ART | - |
dc.identifier.bibliographicCitation | Chemical Engineering Journal, v.484, pp.149506 | - |
dc.identifier.wosid | 001182551700001 | - |
dc.citation.startPage | 149506 | - |
dc.citation.title | Chemical Engineering Journal | - |
dc.citation.volume | 484 | - |
dc.contributor.affiliatedAuthor | 윤용주 | - |
dc.identifier.scopusid | 2-s2.0-85187279679 | - |
dc.description.journalClass | 1 | - |
dc.description.journalClass | 1 | - |
dc.description.isOpenAccess | N | - |
dc.type.docType | Article | - |
dc.subject.keywordPlus | PHOTOCATALYTIC HYDROGEN EVOLUTION | - |
dc.subject.keywordPlus | CARBON NITRIDE | - |
dc.subject.keywordPlus | CONVERSION | - |
dc.subject.keywordPlus | WATER | - |
dc.subject.keywordPlus | NANOSHEETS | - |
dc.subject.keywordPlus | PROSPECTS | - |
dc.subject.keywordPlus | VACANCIES | - |
dc.subject.keywordPlus | NITROGEN | - |
dc.subject.keywordAuthor | 2D nanosheet structure | - |
dc.subject.keywordAuthor | Defect engineering | - |
dc.subject.keywordAuthor | Haber-Bosch process | - |
dc.subject.keywordAuthor | Hydrogen carrier | - |
dc.subject.keywordAuthor | Solar fuel production | - |
dc.relation.journalWebOfScienceCategory | Engineering, Environmental | - |
dc.relation.journalWebOfScienceCategory | Engineering, Chemical | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Engineering | - |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.
library@postech.ac.kr Tel: 054-279-2548
Copyrights © by 2017 Pohang University of Science ad Technology All right reserved.