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Joo, Sang Hoon
Nanomaterials & Catalysis Lab
Research Interests
  • Catalyst, energy conversion, fuel cells, electrolyzer, ORR, HER, OER

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Pore structure and graphitic surface nature of ordered mesoporous carbons probed by low-pressure nitrogen adsorption

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dc.contributor.author Darmstadt, H ko
dc.contributor.author Roy, C ko
dc.contributor.author Kaliaguine, S ko
dc.contributor.author Joo, Sang Hoon ko
dc.contributor.author Ryoo, R ko
dc.date.available 2014-10-02T00:25:12Z -
dc.date.created 2014-09-30 ko
dc.date.issued 2003-06 ko
dc.identifier.citation MICROPOROUS AND MESOPOROUS MATERIALS, v.60, no.1-3, pp.139 - 149 ko
dc.identifier.issn 1387-1811 ko
dc.identifier.uri https://scholarworks.unist.ac.kr/handle/201301/6771 -
dc.description.abstract Ordered mesoporous carbons (OMCs) were produced by pyrolysis of sucrose adsorbed in two different silica matrices (MCM-48 and SBA-15), followed by dissolution of the matrix in hydrofluoric acid. Subsequently, some of these OMCs were heat-treated at temperatures of up to 1600 °C. The OMC pore structure was studied by low-pressure nitrogen adsorption. Information on the graphitic order of the surface of the mesopore walls was also obtained from the nitrogen adsorption data. These results were correlated to the order of the graphene layers at the outer surface, which was studied by X-ray photoelectron spectroscopy (XPS). The OMCs were predominantly mesoporous, but they also contained micropores. For OMCs produced in an SBA-15 matrix, the micropore volume decreased upon heating. After heating to 1600 °C, nearly all micropores had disappeared. Furthermore, upon heating the width of the mesopores increased from 35 to 50 A. All these changes can be explained by a shrinking of the OMC framework upon heating. A different behavior was found for OMCs derived from MCM-48. Upon heating these materials at increasingly high temperatures, the width of the mesopores first decreased, and for temperatures above 1100 °C it increased again. For all OMCs studied the graphitic order of the mesopores and the order of the graphene layers at the outer surface increased upon heating. For a given temperature, the graphitic surface order of OMCs derived from SBA-15 and MCM-48 was similar. ko
dc.description.statementofresponsibility close -
dc.language 영어 ko
dc.publisher ELSEVIER SCIENCE BV ko
dc.title Pore structure and graphitic surface nature of ordered mesoporous carbons probed by low-pressure nitrogen adsorption ko
dc.type ARTICLE ko
dc.identifier.scopusid 2-s2.0-0037803431 ko
dc.identifier.wosid 000183748700013 ko
dc.type.rims ART ko
dc.description.wostc 36 *
dc.description.scopustc 38 *
dc.date.tcdate 2015-05-06 *
dc.date.scptcdate 2014-09-30 *
dc.identifier.doi 10.1016/S1387-1811(03)00335-4 ko
dc.identifier.url http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=0037803431 ko
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