By James A. Schwarz, Cristian I. Contescu
This leading edge reference collects cutting-edge tactics for the development and layout of nanoparticles and porous fabric whereas suggesting acceptable parts of software. offering either synthesis and characterization protocols, Surfaces of Nanoparticles and Porous fabrics includes over 3000 references, tables, equations, drawings, and images. It examines the thermodynamics and kinetics of adsorption related to natural and inorganic beverages, solids, and gaseous media.. themes comprise characterization, shipping procedures, diffusion, and the adsorption of heavy metals, ions, proteins, and pharmaceutical organics.
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Extra info for Surfaces of nanoparticles and porous materials
The solvated gel-like derivative has a bilayered structure. The reaction of silicate gel with T E O S yields TEOS-intercalated layered silicate. The increase of basal spacing in the TEOSintercalated layered silicate may be caused by interlayer solvation and the factor of TEOS molecules The of intercalated T E O S by acid o r base catalyst produces siloxane-intercalated derivatives with well-ordered basal spacing as well as a n increase in the gallery. T h e calcined samples have high specific surface areas between 533 and depending on the catalyst type.
39 n m larger than the gallery height of magadiite precursor gel. 15 n m observed in et reported the effects of organic solvents o n the intercalation of octylamine into According to this result, the expansion of gallery height could be effected not only by the solvation of intercalated octylamine but also by the steric effects of solvated solvent molecules and solvent itself. In the layered silicate gel reacting with excess TEOS, T E O S could be exchanged with solvated free octylamine molecules in the interlayers a n d hydrogen-bonded ion on the inner surface.
The higher molar ratio and the direct synthesis without an intermediate could be taken advantage of for obtaining pure kenyaite industrially. Figure 4 shows scanning electron micrographs of the synthetic magadiite and kenyaite. Na-magadiite shows a particle morphology composed of silicate layers intergrown to form spherical nodules resembling rosettes. The shape of kenyaite is very similar to that of magadiite. The chemical compositions of Na-magadiite and Na-kenyaite were obtained by T G A and EDS analyses for silica and sodium.