Structural characterisation of water / ice formation in SBA - 15
نویسندگان
چکیده
If you believe this document infringes copyright then please contact the KAR admin team with the take-down information provided at http://kar.kent.ac.uk/contact.html Citation for published version Seyed-Yazdi, J. and Farman, Hossein and Dore, John C. and Webber, J. Beau W. and Findenegg, G.H. (2008) Structural characterization of water/ice formation in SBA-15 silicas: III. The triplet profile for 86 angstrom pore diameter. Journal of Physics: Condensed Matter, 20 (20). ISSN 0953-8984.
منابع مشابه
Structural characterization of water and ice in mesoporous SBA-15 silicas: II. The 'almost-filled' case for 86 Å pore diameter.
Neutron diffraction measurements for D(2)O in SBA-15 silica of pore diameter 86 Å have been made in a temperature range from 300 to 100 K. The pore-filling factor for the liquid phase is 0.95, resulting in an 'almost-filled' sample. The nucleation and transformation of the ice phase were determined for cooling and warming cycles at two different rates. The primary nucleation event at 258 K lead...
متن کاملClathrate formation and dissociation in vapour/water/ice/hydrate systems in SBA-15, Sol-Gel and CPG porous media, as probed by NMR relaxation, novel protocol NMR Cryoporometry, Neutron Scattering and ab-initio QM-MD simulation
The Gibbs Thomson effect modifies the pressure and temperature at which clathrates occur, hence altering the depth at which they occur in the sea-bed. NMR measurements as a function of temperature are being conducted for water/ice/hydrate systems in a range of pore geometries, including templated SBA-15 silicas, controlled pore glasses and sol-gel silicas. Rotator-phase plastic ice is shown to ...
متن کاملMelting behavior of water in cylindrical pores: carbon nanotubes and silica glasses.
We report a study of the effects of confinement in multi-walled carbon nanotubes and mesoporous silica glasses (SBA-15) on the solid structure and melting of both H(2)O and D(2)O ice, using differential scanning calorimetry, dielectric relaxation spectroscopy, and neutron diffraction. Multi-walled nanotubes of 2.4, 3.9 and 10 nm are studied, and the SBA-15 studied has pores of mean diameter 3.9...
متن کاملStructural Characterisation of a Polysaccharide from Radix Ranunculus ternati
A water soluble polysaccharide, HB-1, with a molecular weight of 23,930, was isolated from radix Ranunculi ternati. by hot water extraction, ethanol precipitation, deproteination，ultrafiltration and gel-filtration column chromatography. Its sugar composition was determined by GLC as Glc, Ara, and Gal in a molar ration of 16.071: 2.722: 1. And the absolute configuration of Glc was identified as ...
متن کاملStructural Characterisation of a Polysaccharide from Radix Ranunculus ternati
A water soluble polysaccharide, HB-1, with a molecular weight of 23,930, was isolated from radix Ranunculi ternati. by hot water extraction, ethanol precipitation, deproteination，ultrafiltration and gel-filtration column chromatography. Its sugar composition was determined by GLC as Glc, Ara, and Gal in a molar ration of 16.071: 2.722: 1. And the absolute configuration of Glc was identified as ...
متن کامل