Structure and Organic Gas-Adsorption Properties of Some Polyamine Intercalated α-Zirconium Phosphates

Abstract

The intercalation of polyamine into α-zirconium phosphate (α-ZrP) was examined at room temperature and 80 °C. In triethylenetetramine (3E4A), tetraethylenepentamine (4E5A), and pentaethylenehexamine (5E6A) the temperature of the reactions influenced the rate of intercalation, but did not effect the structure of the intercalation compound. On the other hand, the ratios of the constituent phases in the N,N′-bis(3-aminopropyl)-1,3-propanediamine (3P4A) intercalated solid were greatly influenced by the reaction temperature, and two phases with the different interlayer distances could be formed by controlling it. In the phase with an interlayer distance of d = 20 Å, obtained predominantly at 80 °C, 3P4A was present as a monolayer of extended molecules in the interlayer region, in which the longitudinal axis of 3P4A was inclined at ca. 60° to the α-ZrP layers. In the phase with d = 17 Å, obtained at room temperature, 3P4A existed as a bent form. These polyamine intercalated solids drastically adsorbed acetic acid, formaldehyde, acetaldehyde, and cinnamaldehyde.

Unusual adsorption mechanism for carboxylic acid gases by polyamine-intercalated α-zirconium phosphate

“…Recently, we reported that polyamineintercalated layered phosphates can adsorb considerable amounts of gaseous aldehydes and carboxylic acids; however the adsorption mechanism was not described in detail. 9 Although it is remarkable for modified a-zirconium phosphate, which is known as a solid acid, to adsorb considerable amounts of gaseous carboxylic acids, our studies have shown that this can be achieved by simple modification of layered phosphate by the intercalation of polyamine and that the amount of adsorption can be controlled by the degree of modification. Herein we report on the adsorption mechanism of gaseous carboxylic acid by diethylenetriamine-and pentaethylenehexamine-intercalated a-zirconium phosphates using X-ray powder diffraction (XRD) and solid-state 31 P and 13 C NMR.…”

“…As reported in a previous paper, various types of polyamineintercalated layered phosphates were shown to adsorb acetic acid gas. 9 However, it is remarkable for modified a-zirconium phosphate, which is known as a solid acid, to adsorb gaseous carboxylic acids. In order to investigate this curious adsorption mechanism microscopically, preparation of the intercalation compounds with a uniform phase was preferable.…”

Synthesis, characterization and intercalation property of layered zirconium benzylamino-N,N-dimethylphosphonate phosphate materials

“…The characteristic diffraction peak of host ZBMPA disappears in all intercalation compounds. Thus the X-ray powder diffraction patterns clearly demonstrate that alkylamines are intercalated into the galleries of host ZBMPA and form intercalation compound along with the expansion interlayer distances at low angles [32].…”

Adsorption of gaseous formaldehyde and carboxylic acids by ammonium-ion-exchanged α-zirconium phosphate

“…n-Alkylamine formed a monolayer or bilayer structure in the interlayer region of α-ZrP depending on the uptaken amount of the amine [3]. α, ω-Alkanediamine and polyamine were intercalated to form a monolayer structure inclined at about 60 • against the phosphate layer [4,5]. These intercalation compounds are expected as the new functional composite; the interlayer region can be utilized as a new reaction field.…”

“…Previously, we reported that polyamine-intercalated α-ZrP could adsorb gaseous formaldehyde and carboxylic acids by interaction with polyamine in the interlayer region [4,[6][7][8]. Formaldehyde and carboxylic acids are known as harmful compounds causing sick-house syndrome.…”