Full metadata record
DC Field | Value | Language |
---|---|---|
dc.contributor.author | 김동하 | * |
dc.date.accessioned | 2016-08-27T04:08:12Z | - |
dc.date.available | 2016-08-27T04:08:12Z | - |
dc.date.issued | 2015 | * |
dc.identifier.issn | 2046-2069 | * |
dc.identifier.other | OAK-15684 | * |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/217634 | - |
dc.description.abstract | We introduce a new type of doped TiO2 nanostructures, an N-doped mesoporous inverse opal (N-mIO) TiO2 structure as a high-performance visible-light photocatalyst. The mIO TiO2 structure with a 60 nm pore diameter, which possesses a much higher specific area compared with conventional macroporous IO structures, is prepared via a templating approach. The N doping in the mIO TiO2 is achieved via a heat-treatment in the presence of a N-rich precursor. We characterize that the N atom is incorporated in an oxygen-substitution configuration, which effectively narrowed the bandgap of TiO2. We observe that the N doping with a 9.4 wt% doping concentration narrows the bandgap from 3.2 eV to 2.4 eV, which corresponds to light absorption at wavelengths as long as 520 nm. The N doping also changes the surface polarity of TiO2 to a more negative value, which leads to greater adsorption of methylene blue (MB) organic molecules. In the photocatalytic decomposition of MB, the highly N-doped mIO TiO2 exhibits a decomposition rate under visible light exposure that is 4.9 times greater than that of bare IO TiO2. Moreover, compared with the conventional macroporous IO structure, the N-doped mIO exhibits 1.7 times greater activity as a result of its high specific area. We believe this mIO structure can provide a new platform for various electrode applications. | * |
dc.language | English | * |
dc.publisher | ROYAL SOC CHEMISTRY | * |
dc.title | N-doped mesoporous inverse opal structures for visible-light photocatalysts | * |
dc.type | Article | * |
dc.relation.issue | 95 | * |
dc.relation.volume | 5 | * |
dc.relation.index | SCIE | * |
dc.relation.index | SCOPUS | * |
dc.relation.startpage | 77716 | * |
dc.relation.lastpage | 77722 | * |
dc.relation.journaltitle | RSC ADVANCES | * |
dc.identifier.doi | 10.1039/c5ra13198g | * |
dc.identifier.wosid | WOS:000361559900031 | * |
dc.identifier.scopusid | 2-s2.0-84942020190 | * |
dc.author.google | Ha, Su-Jin | * |
dc.author.google | Kim, Dong Ha | * |
dc.author.google | Moon, Jun Hyuk | * |
dc.contributor.scopusid | 김동하(26039227400) | * |
dc.date.modifydate | 20240123104500 | * |