Cellulose acetate-Al2O3 hybrid material coated with N-Propyl-1,4-diazabicyclo [2.2.2] octane chloride: preparation, characterization and study of some metal halides adsorption from ethanol solution

Abstract

) and its affinities to the metal halides were determined by analyzing the adsorption isotherms with the help of the model of fixed polydentate centers. The constants of the adsorption equilibria (β, in L mol -1 ) were used as the quantitative characteristics of affinity. For the FeCl 3 adsorption equilibrium the specific concentration of the sorption centers t σ-L + Clis equal to 1.42 and log β 11 = 3.14. The adsorption of CoCl 2 and CuCl 2 (MCl 2 ) is described in a more complicated way:The following values of parameters were obtained: t {σ -L+ Cl-} 2 = 0.20 and 0.115; log β 21 = 4.08 and 3.3 for CoCl 2 and CuCl 2 respectively.

Simulation of adsorption equilibria on hybrid materials: Binding of metal chlorides with 3-n-propylpyridinium silsesquioxane chloride ion exchanger

“…In general, for new kinds of hybrid materials, origins of nonideality and cooperativity are not clear enough. Thus, in contrast to the material studied in the present work, silica and cellulose/Al 2 O 3 carriers modified with pyridinium groups do not demonstrate nonideality effects when metal chlorides are adsorbed [18,23,24]. Many factors may affect the chemisorption process and the state of bound ligands and complexes, for instance, heterogeneous surface topography, porous structure of materials, peculiar conformation and accessibility of fixed reacting groups, electrostatic effects, solvation/desolvation effects, and so on.…”

“…They were used, in particular, to get keener insight into sorption and ion exchange equilibria on surfaces of such hybrids as cellulose acetate fibers (CAF) coated with Al 2 O 3 and modified with nitrogen-containing ligands [17], sol-gel derived SiO 2 /TiO 2 /Sb 2 O 5 mixed oxide [18], CAF coated with highly dispersed aluminum [19,20] and zirconium [21] phosphates, silica gel coated with 3-n-propyl(4-methylpyridinium) silsesquioxane chloride polymer [22,23], CAF coated with n-propyl-1,4-diazabicyclo(2.2.2)octane chloride [24], SiO 2 /Nb 2 O 5 prepared by the sol-gel method and modified with phosphoric acid [25], xerogels containing aniline [26] and xylenol orange groups [27], and others. This paper discusses the simulation of sorption equilibria of metal chlorides on the surface of 3-n-propylpyridinium silsesquioxane chloride polymer from ethanol media.…”

Structure and property studies of hybrid xerogels containing bridged positively charged 1,4-diazoniabicycle[2.2.2]octane dichloride

“…An important characteristic of this xerogel was its high solubility in water and its capacity to form stable thin layer films on various surfaces containing silanol, SiOH, or aluminol, Al-OH, groups [10]. The solubility observed in this case was dependent on the amount of the organic, material i.e., on the Si/C mole ratios.…”

Anisotropic self-organization of hybrid silica based xerogels containing bridged positively charged 1,4-diazoniabicycle[2.2.2]octane chloride group

“…Recently it was reported the synthesis of hybrids containing charged organic groups like quaternary ammonium, pyridinium and dabconium halides, bonded in a pendant way, which showed interesting properties like thermal stability, water solubility, ability to form films over inorganic surfaces [27][28][29][30][31]. Due to these characteristics they can be used as anion-exchangers, stationary phase for chromatography and electrochemical devices [31][32][33][34][35].…”