Full metadata record
DC Field | Value | Language |
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dc.contributor.author | 황성주 | - |
dc.date.accessioned | 2016-08-27T02:08:50Z | - |
dc.date.available | 2016-08-27T02:08:50Z | - |
dc.date.issued | 2008 | - |
dc.identifier.issn | 0253-2964 | - |
dc.identifier.other | OAK-4821 | - |
dc.identifier.uri | https://dspace.ewha.ac.kr/handle/2015.oak/216244 | - |
dc.description.abstract | We have investigated the influence of the crystal structure on the chemical bonding nature and photocatalytic activity of cubic and hexagonal perovskite A[Cr1/2Ta1/2]O-3 (A = Sr, Ba) compounds. According to neutron diffraction and field emission-scanning electron microscopy, the crystal structure and particle size of these compounds are strongly dependent on the nature of A-site cations. Also, it was found that the face-shared octahedra in the hexagonal phase are exclusively occupied by chromium ions, suggesting the presence of metallic (Cr-Cr) bonds. X-ray absorption and diffuse UV-vis spectroscopic analyses clearly demonstrated that, in comparison with cubic Sr[Cr1/2Ta1/2]O-3 phase, hexagonal Ba[Cr1/2Ta1/2]O-3 phase shows a decrease of Cr oxidation state as well as remarkable changes in interband Cr d-d transitions, which can be interpreted as a result of metallic (Cr-Cr) interactions. According to the test of photocatalytic activity, the present semiconducting materials have a distinct activity against the photodegradation of 4-chlorophenol. Also the Sr-based compound was found to show a higher photocatalytic activity than the Ba-based one, which is attributable to its smaller particle size and its stronger absorption in visible light region. | - |
dc.language | English | - |
dc.publisher | KOREAN CHEMICAL SOC | - |
dc.subject | hexagonal perovskite structure | - |
dc.subject | face sharing | - |
dc.subject | metal-metal bonds | - |
dc.subject | photocatalysis | - |
dc.subject | particle size | - |
dc.title | Influence of crystal structure on the chemical bonding nature and photocatalytic activity of hexagonal and cubic perovskite compounds | - |
dc.type | Article | - |
dc.relation.issue | 4 | - |
dc.relation.volume | 29 | - |
dc.relation.index | SCIE | - |
dc.relation.index | SCOPUS | - |
dc.relation.index | KCI | - |
dc.relation.startpage | 817 | - |
dc.relation.lastpage | 821 | - |
dc.relation.journaltitle | BULLETIN OF THE KOREAN CHEMICAL SOCIETY | - |
dc.identifier.wosid | WOS:000256000700022 | - |
dc.identifier.scopusid | 2-s2.0-44149104577 | - |
dc.author.google | Lee, Sun Hee | - |
dc.author.google | Kim, In Young | - |
dc.author.google | Kim, Tae Woo | - |
dc.author.google | Hwang, Seong-Ju | - |
dc.contributor.scopusid | 황성주(7404626171) | - |
dc.date.modifydate | 20190901081003 | - |