Endre søk
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf
Delamination of Ti-MWW and high efficiency in epoxidation of alkenes with various molecular sizes
Stockholms universitet, Naturvetenskapliga fakulteten, Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi.
Vise andre og tillknytning
2004 Inngår i: Journal of Physical Chemistry B, ISSN 1089-5647, Vol. 108, nr 50, s. 19126-19131Artikkel i tidsskrift (Fagfellevurdert) Published
sted, utgiver, år, opplag, sider
2004. Vol. 108, nr 50, s. 19126-19131
Identifikatorer
URN: urn:nbn:se:su:diva-24770OAI: oai:DiVA.org:su-24770DiVA, id: diva2:198281
Merknad
Part of urn:nbn:se:su:diva-7439Tilgjengelig fra: 2008-04-03 Laget: 2008-03-28bibliografisk kontrollert
Inngår i avhandling
1. Development of electron microscopy towards nano-structured porous materials: Focus on novel zeolites from layered silicates and chiral mesoporous nanotubes
Åpne denne publikasjonen i ny fane eller vindu >>Development of electron microscopy towards nano-structured porous materials: Focus on novel zeolites from layered silicates and chiral mesoporous nanotubes
2008 (engelsk)Doktoravhandling, med artikler (Annet vitenskapelig)
Abstract [en]

Three novel zeolites (M-IEZ-MWW, IEZ-FER and IEZ-CDO) have been successfully synthesised from the corresponding precursors. Structure characterisation of those materials was conducted by TEM. Our studies show that the structure of the new zeolites keeps identical layer to the corresponding known 3D zeolite, except for the distinct expansion of the layer spacing. Combining with results from XRD, N2 adsorption, IR and NMR, the expansion can be explained by the pillaring of T sites between the layers. Meanwhile, the intergrowth of 3D MWW and IEZ-MWW was observed in the Al-IEZ-MWW and Si-IEZ-MWW crystals, IEZ-CDO structure was found in the IEZ-FER crystals, and the intergrowth of CDO and new polymorph was observed in the CDS-1 crystal. Moreover, two new zeolites IM-5 and SSZ-57 were also studied by TEM. We found that the space group of IM-5 is non-centrosymmetrical, and in SSZ-57 the new structure with slightly larger c parameter was observed compared to MEL.

Chiral mesoporous silica nanotube and chiral mesoporous carbon nanotube were aslo investigated by TEM. We found that the former was synthesised by hollowing out process and it possesses chiral mesopores in the wall, the latter was synthesised by templating and seeding method. Electron tomography was first applied to study the handedness of the chiral mesoporous nanotube. Furthermore, TEM studies verified that bifunctional mesoporous silica has a Fm-3m structure, and mesoporous carbon FDU-16 has a Im-3m structure.

sted, utgiver, år, opplag, sider
Stockholm: Institutionen för fysikalisk kemi, oorganisk kemi och strukturkemi, 2008. s. 125
Emneord
Transmission electron microscopy, Layered silicates, Chiral mesoporous nanotubes
Forskningsprogram
strukturkemi
Identifikatorer
urn:nbn:se:su:diva-7439 (URN)978-91-7155-602-8 (ISBN)
Disputas
2008-04-25, Magnélisalen, Kemiska övningslaboratoriet, Svante Arrhenius väg 12 A, Stockholm, 13:30 (engelsk)
Opponent
Veileder
Tilgjengelig fra: 2008-04-03 Laget: 2008-03-28 Sist oppdatert: 2010-04-14bibliografisk kontrollert

Open Access i DiVA

Fulltekst mangler i DiVA

Av organisasjonen

Søk utenfor DiVA

GoogleGoogle Scholar

urn-nbn

Altmetric

urn-nbn
Totalt: 174 treff
RefereraExporteraLink to record
Permanent link

Direct link
Referera
Referensformat
  • apa
  • ieee
  • modern-language-association-8th-edition
  • vancouver
  • Annet format
Fler format
Språk
  • de-DE
  • en-GB
  • en-US
  • fi-FI
  • nn-NO
  • nn-NB
  • sv-SE
  • Annet språk
Fler språk
Utmatningsformat
  • html
  • text
  • asciidoc
  • rtf