https://scholars.lib.ntu.edu.tw/handle/123456789/301901
DC Field | Value | Language |
---|---|---|
dc.contributor.author | Wu, C.-W. | en_US |
dc.contributor.author | Kuwabara, M. | en_US |
dc.contributor.author | KEVIN CHIA-WEN WU | en_US |
dc.creator | KEVIN CHIA-WEN WU;Kuwabara, M.;Wu, C.-W.;KEVIN CHIA-WEN WU | - |
dc.date.accessioned | 2018-09-10T04:29:04Z | - |
dc.date.available | 2018-09-10T04:29:04Z | - |
dc.date.issued | 2003 | - |
dc.identifier.issn | 15741443 | - |
dc.identifier.uri | http://www.scopus.com/inward/record.url?eid=2-s2.0-0242524621&partnerID=MN8TOARS | - |
dc.identifier.uri | http://scholars.lib.ntu.edu.tw/handle/123456789/301901 | - |
dc.identifier.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-0242524621&partnerID=40&md5=7736c9e16af7e779e8089371d27964b2 | - |
dc.description.abstract | High titanium-loading hexagonal mesostructured silica thin films (Ti-HMSTF) have been successfully synthesized by carefully controlling two factors. One is the hydrolysis and condensation reaction of titanium alkoxide and the other is the aging condition of as-made Ti/Si mixed thin films. The former was controlled by adding acetylacetone (AcAc) as a Ti chelating agent. Regarding the latter, aging under a hydrothermal water vapor ambient environment was found to be effective in synthesizing Ti-HMSTFs with well-defined mesostructures. The maximum molar ratio of Ti/Si in the Ti-HMSTF materials attained a value of 0.3 (referred to as Ti-HMSTF-0.3) for the as-made films. These materials were subjected to a specific hydrothermal aging process, which was prepared from a precursor solution containing AcAc with the molar ratio AcAc/Ti = 1. Small angle X-ray diffractometry (SA-XRD) and transmission electron microscopy (TEM) demonstrated that Ti-HMSTF-0.3 had a highly ordered 2-dimensional hexagonal mesostructure. This 2D hexagonal mesostructure was thermally stable even after the removal of the triblock copolymer template by calcination at 450°C for 4 h. Moreover, small amounts of TiO2 anatase nanocrystals with a size of about 3 nm were formed in the calcined Ti-HMSTF-0.3. O(1s) X-ray photoelectron spectroscopy (XPS) analysis indicated that the incorporation of titanium into the HMSTF was through the Si-O-Ti bonds. The Ti(2p) XPS showed that the binding energy of the titanium in HMSTF decreased with increasing Ti loading. © 2003 Plenum Publishing Corporation. | - |
dc.language | en | en |
dc.relation.ispartof | Journal of Inorganic and Organometallic Polymers and Materials | en_US |
dc.source | AH | - |
dc.subject | Hydrothermal water vapor treatments; Mesoporous materials; TiO2 anatase nanocrystals; Titania/silica mixed thin films; X-ray photo-electron spectroscopy | - |
dc.subject.other | silicon dioxide; titanium; titanium dioxide; article; crystal; film; hydrolysis; nanoparticle; reaction analysis; synthesis; transmission electron microscopy; X ray diffraction; X ray photoelectron spectroscopy | - |
dc.title | Direct synthesis and characterization of high titanium-loading hexagonal mesostructured silica thin films | - |
dc.type | journal article | en |
dc.identifier.scopus | 2-s2.0-0242524621 | - |
dc.relation.pages | 131-141 | - |
dc.relation.journalvolume | 13 | - |
dc.relation.journalissue | 3 | - |
item.openairecristype | http://purl.org/coar/resource_type/c_6501 | - |
item.openairetype | journal article | - |
item.grantfulltext | none | - |
item.cerifentitytype | Publications | - |
item.fulltext | no fulltext | - |
crisitem.author.dept | Chemical Engineering | - |
crisitem.author.orcid | 0000-0003-0590-1396 | - |
crisitem.author.parentorg | College of Engineering | - |
Appears in Collections: | 化學工程學系 |
Items in DSpace are protected by copyright, with all rights reserved, unless otherwise indicated.