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Yolk-shell-type gold nanosphere-encapsulated mesoporous silica for catalytic oxidation of organic pollutants in the presence of persulfate
DC Field | Value | Language |
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dc.contributor.author | Kim, Geun Young | - |
dc.contributor.author | Lee, Donghyun | - |
dc.contributor.author | Choe, Hyun-Seok | - |
dc.contributor.author | Park, Jeong-Min | - |
dc.contributor.author | Jeong, Suyoung | - |
dc.contributor.author | Park, Erwin Jongwoo | - |
dc.contributor.author | Lee, Ji Won | - |
dc.contributor.author | Lee, Changha | - |
dc.contributor.author | Kim, Jae-Hyuk | - |
dc.date.accessioned | 2022-10-26T07:45:40Z | - |
dc.date.available | 2022-10-26T07:45:40Z | - |
dc.date.created | 2022-07-21 | - |
dc.date.issued | 2022-07 | - |
dc.identifier.citation | Environmental Science: Nano, Vol.9 No.7, pp.2510-2520 | - |
dc.identifier.issn | 2051-8153 | - |
dc.identifier.uri | https://hdl.handle.net/10371/187029 | - |
dc.description.abstract | The increased production and release of organic pollutants due to industrial development has necessitated effective water treatment technologies. In this study, an unprecedented yolk-shell-structured catalyst was developed and evaluated for the oxidative degradation of organic pollutants. Gold nanospheres (AuNSs) encapsulated in mesoporous silica nanocapsules (AuNS@ySiO2) were synthesized via seeded growth and a subsequent selective etching process, and their characteristic properties were analyzed thoroughly. To investigate the catalytic performance of the AuNS@ySiO2/peroxydisulfate (PDS) system, comparative experiments were performed with various control groups of different structures (bulk AuNS suspension, hollow silica nanocapsules without AuNSs, and AuNS-decorated silica nanoparticles) with phenol as the target compound. The AuNS@ySiO2/PDS system exhibited outstanding performance in phenol degradation compared to the control groups with an identical amount of AuNSs, which resulted from the enhanced colloidal stability of the AuNSs. A series of experiments to elucidate the mechanism of phenol degradation suggested that electron transfer from phenol to PDS mediated by AuNSs is a highly plausible pathway. Furthermore, in the presence of humic acid, phenol degradation by the AuNS@ySiO2/PDS system was significantly less inhibited compared to the results for the control group (AuNS-decorated silica nanoparticles), owing to the molecular sieving effect of the mesoporous silica shell constituting AuNS@ySiO2. The newly developed yolk-shell-structured catalyst can prospectively be effectively applied in the catalytic oxidation of organic pollutants owing to its unique structural properties and high catalytic activity. | - |
dc.language | 영어 | - |
dc.publisher | Royal Society of Chemistry | - |
dc.title | Yolk-shell-type gold nanosphere-encapsulated mesoporous silica for catalytic oxidation of organic pollutants in the presence of persulfate | - |
dc.type | Article | - |
dc.identifier.doi | 10.1039/d2en00305h | - |
dc.citation.journaltitle | Environmental Science: Nano | - |
dc.identifier.wosid | 000809867800001 | - |
dc.identifier.scopusid | 2-s2.0-85132421305 | - |
dc.citation.endpage | 2520 | - |
dc.citation.number | 7 | - |
dc.citation.startpage | 2510 | - |
dc.citation.volume | 9 | - |
dc.description.isOpenAccess | N | - |
dc.contributor.affiliatedAuthor | Lee, Changha | - |
dc.type.docType | Article | - |
dc.description.journalClass | 1 | - |
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