A low field NMR study of water adsorbed on silica and alumina surfaces

被引：2

作者：

Alhajji, E. ^{[1
]}

Mrad, O. ^{[2
]}

机构：

[1] Atom Energy Commiss, Dept Protect & Safety, Damascus, Syria

[2] Atom Energy Commiss, Dept Chem, Damascus, Syria

来源：

COMPOSITE INTERFACES | 2012年 / 19卷 / 05期

关键词：

NMR; relaxation times; water; silica alumina; DROPLET SIZE DISTRIBUTIONS; INTEGRAL-EQUATIONS; RELAXATION; EMULSIONS; SYSTEM; GLASS;

D O I：

10.1080/15685543.2012.726057

中图分类号：

TB33 [复合材料];

学科分类号：

摘要：

Low field (0.54 T) proton nuclear magnetic resonance spectroscopy (H-1 NMR) was used in order to determine the water adsorbed on porous silica and nano-powder alumina, between 0 and 36% of water content by analyzing free induction decay (FID) and Carr-Purcell-Meiboom- Gill (CPMG) relaxation curves at room temperature. The main objective of this study is to demonstrate the usefulness of NMR relaxation times in characterization of the state of water in silica and alumina, the first results showed that the CPMG sequence detected all added adsorbed water and very probably the few residual water molecules of dry samples. A short apparent transverse relaxation time T-2* of 50 mu s was observed for silica and a very short one of 15 mu s for alumina.

引用

页码：313 / 320

页数：8

共 50 条

[31] IR-SPECTRA OF WATER ADSORBED ON HYDROTHERMALLY TREATED SILICA PLATE SURFACES
ERSHOVA, GF
CHURAEV, NV
COLLOID JOURNAL OF THE USSR, 1979, 41 (06): : 994 - 996
[32] The Measurements of Correlation Times of Molecules Adsorbed on Silica Gel, Alumina and Charcoal Using NOESY and MAS NMR
Xue, Y.
Du, Y. -R.
Ye, C. -H.
Kong, Y. -H.
APPLIED MAGNETIC RESONANCE, 1990, 1 (03) : 413 - 421
[33] Electrical Conductivity at Surfaces of Silica Nanoparticles with Adsorbed Water at Various Relative Humidities
Umezawa, Ryosuke
Katsura, Makoto
Nakashima, Satoru
E-JOURNAL OF SURFACE SCIENCE AND NANOTECHNOLOGY, 2018, 16 : 376 - 381
[34] Solid-state NMR and computational chemistry study of mononucleotides adsorbed to alumina
Fry, Roderick A.
Kwon, Kideok D.
Komarneni, Sridhar
Kubicki, James D.
Mueller, Karl T.
LANGMUIR, 2006, 22 (22) : 9281 - 9286
[35] NMR Relaxation Dispersion of Liquids Adsorbed on Modified Surfaces of SBA-15 Mesoporous Silica
Gizatullin, Bulat
Mattea, Carlos
Stapf, Siegfried
Wissel, Till
Buntkowsky, Gerd
JOURNAL OF PHYSICAL CHEMISTRY C, 2024, 128 (21): : 8785 - 8796
[36] Desorption of lysine modified and unmodified proteins from solid surfaces -: Elution of β-lactoglobulin adsorbed on alumina and silica
Bhaduri, A
Das, KP
JOURNAL OF DISPERSION SCIENCE AND TECHNOLOGY, 1999, 20 (04) : 1125 - 1142
[37] PHOTOIONIZATION ON INSULATOR SURFACES - DIFFUSE REFLECTANCE LASER FLASH-PHOTOLYSIS OF DISTYRYLBENZENES ADSORBED ON SILICA AND ALUMINA
OELKRUG, D
REICH, S
WILKINSON, F
LEICESTER, PA
JOURNAL OF PHYSICAL CHEMISTRY, 1991, 95 (01): : 269 - 274
[38] ESR STUDY OF NO2 ADSORBED ON SILICA-GEL SURFACES
IWAIZUMI, M
ISOBE, T
KUBOTA, S
BULLETIN OF THE CHEMICAL SOCIETY OF JAPAN, 1971, 44 (12) : 3227 - +
[39] ATR-FTIR study of IgG adsorbed on different silica surfaces
Giacomelli, CE
Bremer, MGEG
Norde, W
JOURNAL OF COLLOID AND INTERFACE SCIENCE, 1999, 220 (01) : 13 - 23
[40] DIELECTRIC BEHAVIOR OF WATER ADSORBED ON ALUMINA
BALDWIN, MG
MORROW, JC
JOURNAL OF CHEMICAL PHYSICS, 1962, 36 (06): : 1591 - &

← 1 2 3 4 5 →