Hollow spheres of CoCr2O4-Cr2O3 mixed oxides with nanoscale heterojunctions for exclusive detection of indoor xylene
DC Field | Value | Language |
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dc.contributor.author | Kim, Bo-Young | - |
dc.contributor.author | Yoon, Ji-Won | - |
dc.contributor.author | Lim, Kyeorei | - |
dc.contributor.author | Park, Sung Hyun | - |
dc.contributor.author | Yoon, Ji-Wook | - |
dc.contributor.author | Lee, Jong-Heun | - |
dc.date.accessioned | 2021-09-02T05:01:08Z | - |
dc.date.available | 2021-09-02T05:01:08Z | - |
dc.date.created | 2021-06-19 | - |
dc.date.issued | 2018-10-28 | - |
dc.identifier.issn | 2050-7526 | - |
dc.identifier.uri | https://scholar.korea.ac.kr/handle/2021.sw.korea/72432 | - |
dc.description.abstract | As an effective alternative to simple binary oxide chemiresistors, polynary oxides with excellent tunability of the composition and hetero-interfaces are considered as promising material platforms for designing highly selective and sensitive gas sensors. In this study, ternary spinel CoCr2O4 hollow spheres and CoCr2O4-Cr2O3 mixed oxide hollow spheres were prepared via one-pot ultrasonic spray pyrolysis using solutions with different cation compositions (i.e., [Cr]/[Co] = 2, 3, and 4), and their gas-sensing characteristics were investigated. The pure CoCr2O4 hollow spheres exhibited an unusually high response to 5 parts per million (ppm) of p-xylene (ratio of resistance to gas and air = 61.4), with negligible cross-responses to 5 ppm of ethanol, toluene, benzene, trimethylamine, ammonia, formaldehyde, and carbon monoxide. When CoCr2O4-Cr2O3 hollow spheres with discrete Cr2O3 nanoclusters were formed using a spray solution with a [Cr]/[Co] ratio of 3, the xylene response was enhanced to 144.1, which allows the sensitive and selective detection of sub-ppm level p-xylene. The unprecedentedly high xylene selectivity and response in the present study are explained by the gas-accessible hollow morphology, the unique catalytic activity of the ternary and mixed oxides, and the enhanced chemiresistivity due to the formation of a heterojunction between CoCr2O4 and Cr2O3. The novel ternary oxide-based gas sensors with excellent xylene-sensing performance can be used in indoor air-monitoring applications. | - |
dc.language | English | - |
dc.language.iso | en | - |
dc.publisher | ROYAL SOC CHEMISTRY | - |
dc.subject | HIGHLY-ACTIVE CATALYSTS | - |
dc.subject | GAS-SENSING PROPERTIES | - |
dc.subject | SELECTIVE DETECTION | - |
dc.subject | FACILE SYNTHESIS | - |
dc.subject | CO | - |
dc.subject | OXIDATION | - |
dc.subject | SENSOR | - |
dc.subject | COMBUSTION | - |
dc.subject | METHANE | - |
dc.subject | TOLUENE | - |
dc.title | Hollow spheres of CoCr2O4-Cr2O3 mixed oxides with nanoscale heterojunctions for exclusive detection of indoor xylene | - |
dc.type | Article | - |
dc.contributor.affiliatedAuthor | Lee, Jong-Heun | - |
dc.identifier.doi | 10.1039/c8tc04166k | - |
dc.identifier.scopusid | 2-s2.0-85055212798 | - |
dc.identifier.wosid | 000448342700011 | - |
dc.identifier.bibliographicCitation | JOURNAL OF MATERIALS CHEMISTRY C, v.6, no.40, pp.10767 - 10774 | - |
dc.relation.isPartOf | JOURNAL OF MATERIALS CHEMISTRY C | - |
dc.citation.title | JOURNAL OF MATERIALS CHEMISTRY C | - |
dc.citation.volume | 6 | - |
dc.citation.number | 40 | - |
dc.citation.startPage | 10767 | - |
dc.citation.endPage | 10774 | - |
dc.type.rims | ART | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
dc.description.journalRegisteredClass | scie | - |
dc.description.journalRegisteredClass | scopus | - |
dc.relation.journalResearchArea | Materials Science | - |
dc.relation.journalResearchArea | Physics | - |
dc.relation.journalWebOfScienceCategory | Materials Science, Multidisciplinary | - |
dc.relation.journalWebOfScienceCategory | Physics, Applied | - |
dc.subject.keywordPlus | HIGHLY-ACTIVE CATALYSTS | - |
dc.subject.keywordPlus | GAS-SENSING PROPERTIES | - |
dc.subject.keywordPlus | SELECTIVE DETECTION | - |
dc.subject.keywordPlus | FACILE SYNTHESIS | - |
dc.subject.keywordPlus | CO | - |
dc.subject.keywordPlus | OXIDATION | - |
dc.subject.keywordPlus | SENSOR | - |
dc.subject.keywordPlus | COMBUSTION | - |
dc.subject.keywordPlus | METHANE | - |
dc.subject.keywordPlus | TOLUENE | - |
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