DC Field | Value | Language |
---|---|---|
dc.contributor.author | Lee, Min-Jae | ko |
dc.contributor.author | Kang, Shin Hyun | ko |
dc.contributor.author | Dey, Jahar | ko |
dc.contributor.author | Choi, Sung-Min | ko |
dc.date.accessioned | 2018-08-20T07:49:34Z | - |
dc.date.available | 2018-08-20T07:49:34Z | - |
dc.date.created | 2018-08-01 | - |
dc.date.created | 2018-08-01 | - |
dc.date.issued | 2018-07 | - |
dc.identifier.citation | ACS APPLIED MATERIALS & INTERFACES, v.10, no.26, pp.22562 - 22570 | - |
dc.identifier.issn | 1944-8244 | - |
dc.identifier.uri | http://hdl.handle.net/10203/244865 | - |
dc.description.abstract | A method to fabricate porous silica-coated Au sponges that show high thermal and catalytic stability has been developed for the first time. The method involves dense surface functionalization of Au sponges (made by self-assembly of Au nanoparticles) with thiolated poly(ethylene glycol) (SHPEG), which provides binding and condensation sites for silica precursors. The silica coating thickness can be controlled by using SH-PEG of different molecular weights. The silica-coated Au sponge prepared by using 5 kDa SH-PEG maintains its morphology at temperature as high as 700 degrees C. The calcination removes all organic molecules, resulting in porous silica-coated Au sponges, which contain hierarchically connected micro- and mesopores. The hierarchical pore structures provide an efficient pathway for reactant molecules to access the surface of Au sponges. The porous silica-coated Au sponges show an excellent catalytic recyclability, maintaining the catalytic conversion percentage of 4-nitrophenol by NaBH4 to 4-aminophenol as high as 93% even after 10 catalytic cycles. The method may be applicable for other porous metals, which are of great interests for catalyst, fuel cell, and sensor applications. | - |
dc.language | English | - |
dc.publisher | AMER CHEMICAL SOC | - |
dc.subject | NANOPOROUS-GOLD | - |
dc.subject | 4-NITROPHENOL REDUCTION | - |
dc.subject | CO OXIDATION | - |
dc.subject | NANOPARTICLES | - |
dc.subject | AU | - |
dc.subject | TEMPERATURE | - |
dc.subject | NITROPHENOL | - |
dc.subject | FRAMEWORK | - |
dc.title | Porous Silica-Coated Gold Sponges with High Thermal and Catalytic Stability | - |
dc.type | Article | - |
dc.identifier.wosid | 000438179000087 | - |
dc.identifier.scopusid | 2-s2.0-85047733299 | - |
dc.type.rims | ART | - |
dc.citation.volume | 10 | - |
dc.citation.issue | 26 | - |
dc.citation.beginningpage | 22562 | - |
dc.citation.endingpage | 22570 | - |
dc.citation.publicationname | ACS APPLIED MATERIALS & INTERFACES | - |
dc.identifier.doi | 10.1021/acsami.8b04811 | - |
dc.contributor.localauthor | Choi, Sung-Min | - |
dc.contributor.nonIdAuthor | Dey, Jahar | - |
dc.description.isOpenAccess | N | - |
dc.type.journalArticle | Article | - |
dc.subject.keywordAuthor | gold sponges | - |
dc.subject.keywordAuthor | porous silica coating | - |
dc.subject.keywordAuthor | thermal stability | - |
dc.subject.keywordAuthor | catalysts | - |
dc.subject.keywordAuthor | 4-nitrophenol reduction | - |
dc.subject.keywordPlus | NANOPOROUS-GOLD | - |
dc.subject.keywordPlus | 4-NITROPHENOL REDUCTION | - |
dc.subject.keywordPlus | CO OXIDATION | - |
dc.subject.keywordPlus | NANOPARTICLES | - |
dc.subject.keywordPlus | AU | - |
dc.subject.keywordPlus | TEMPERATURE | - |
dc.subject.keywordPlus | NITROPHENOL | - |
dc.subject.keywordPlus | FRAMEWORK | - |
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