Linked Life Data

19452984

Source:http://linkedlifedata.com/resource/pubmed/id/19452984

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
5
pubmed:dateCreated
2009-5-20
pubmed:abstractText
Mesoporous silica-pillared H(+)-kenyaite (SPK) derivatives with highly ordered gallery structure and thermal resistance were prepared by the hydrolysis of TEOS (tetraethylorthosilicate) in interlayer space, using DDA (dodecylamine) as catalyst and template. DDA-TEOS/H(+)-kenyaite intercalation compounds were obtained by the dispersion of H(+)-kenyaite in DDA-TEOS solution. DDA-TEOS/H(+)-kenyaites were hydrolyzed rapidly in pure water, forming siloxane pillared H(+)-kenyaites. Calcination of siloxane pillared H(+)-kenyaites for 5 h at 600 degrees C in air resulted in mesoporous SPK derivatives. These exhibited refractions corresponding to a basal spacing of 5.0-5.5 nm, a uniform pore size of 2.5-3.0 nm and large surface areas between 707 and 877 m2/g. TEM images confirmed that SPK had uniform interlayer spaces of 2.0-3.0 nm in agreement with the gallery height and pore size data. The structure and physical properties of SPK remained stable after heating for 5 h at 800 degrees C in air. This is attributed to the stable structure of kenyaite composed of 4-fold SiO4 tetrahedral sheets, and the formation of firm silica pillars.
pubmed:language
eng
pubmed:journal
pubmed:status
PubMed-not-MEDLINE
pubmed:month
May
pubmed:issn
1533-4880
pubmed:author
pubmed:issnType
Print
pubmed:volume
9
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
3160-5
pubmed:year
2009
pubmed:articleTitle
Mesoporous silica-pillared H(+)-kenyaite with highly ordered gallery structure.
pubmed:affiliation
Department of Chemistry and Research Institute of Natural Science, Gyeongsang National University, Jinju 660-701, Korea.
pubmed:publicationType
Journal Article