Journal ArticleDOI
A New Approach to the Silica Gel Surface. Characterization of Different Surface Regions by 29Si Magic Angle Spinning NMR Relaxation Parameters and Consequences for Quantification of Silica Gels by NMR.
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This article is published in ChemInform.The article was published on 1990-08-14. It has received 43 citations till now. The article focuses on the topics: Magic angle spinning & Silica gel.read more
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Chemical modification of silica surface by immobilization of functional groups for extractive concentration of metal ions.
TL;DR: Increased utilization of mechanically stable synthetic matrices particularly silica gel as a solid support and its surface modification by impregnation of organic ligands directly or covalent grafting through spacer unit for extractive concentration of trace elements are highlighted in the present article.
Journal ArticleDOI
A structural investigation relating to the pozzolanic activity of rice husk ashes
TL;DR: A structural study of RHA samples in relation to their reactivity has been performed; Silica in RHA formed by burning rice husk in a laboratory furnace under continuous supply of air have been characterized as a function of incineration temperature, time and cooling regime as mentioned in this paper.
Journal ArticleDOI
Characterization of bonded phases by solid-state NMR spectroscopy
Klaus Albert,Ernst Bayer +1 more
TL;DR: In this paper, the structure and dynamics of chemically modified silica gels have been investigated by high-resolution solid-state NMR spectroscopy using 29Si cross-polarization and magic angle spinning (CP-MAS).
Journal ArticleDOI
Particle morphology and chemical microstructure of colloidal silica spheres made from alkoxysilanes
A. van Blaaderen,A.P.M. Kentgens +1 more
TL;DR: In this paper, a comparison between colloidal colloidal silica spheres with radii in the range 10-500 nm were prepared by hydrolysis and condensation of tetraethoxysilane (TES) in a mixture of water, ammonia and a lower alcohol at several temperatures.
Journal ArticleDOI
Survey and Trends in the Preparation of Chemically Bonded Silica Phases for Liquid Chromatographic Analysis
TL;DR: In order to increase chromatographic selectivity and to extend the analytical capability of reversed phase liquid chromatography (RP HPLC) many investigators have concentrated on the preparation of silica based column packings with chemically bonded phases (CBP) as discussed by the authors.
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A new approach to the silica gel surface : characterization of different surface regions by 29Si magic angle spinning NMR relaxation parameters and consequences for quantification of silica gels by NMR: characterization of different surface regions by silicon-29 magic angle spinning NMR relaxation parameters and consequences for quantification of silica gels by NMR
TL;DR: In this article, the longitudinal relaxation process of native silica gels generally can be separated into at least three different processes, each with its characteristic average value for Tlsi.
Related Papers (5)
Silicon-29 NMR study of the surface of silica gel by cross polarization and magic-angle spinning
Gary E. Maciel,Dean W. Sindorf +1 more