Preparation of Nano-Kaolinite and Mechanism

Abstract

With potassium acetate as an intercalation agent, kaolinite-potassium acetate(KAc) intercalation complexes was prepared. Afterwards, nano-kaolinite was successfully made through exfoliated intercalation complexes using power ultrasonic. The intermediate and final products were characterized by X-ray diffraction(XRD), infrared spectroscopy(IR), laser particle size analyzer, and scanning electron microscope (SEM). The results show that intercalation of KAc into kaolinite resulted in a crystal space expansion, from a basal spacing of 7.14Ǻ to 14.20 Ǻ, and the intercalation rate was about 80%. KAc intercalation causes the weakening of interlayer stability. It was shown that the particles of nano-kaolinite is very thin lamellar in shape, whose average thickness, average particle size, are 50 nm and 450 nm respectively.

Preparation and characterization of nano Muscovite by intercalation method for adsorption of heavy metals from polluted water

“…The bands at 1403 cm -1 , 1542 cm -1 are corresponding to the symmetric and asymmetric stretching vibration of the CH 3 COO-group, respectively. The 1395-1440 cm -1 band is attributed to the formation of coupling between C-O vibration and deformation vibration mode of the O-H groups (Ding et al, 2011). In the case of PN/Muscovite, not all peaks appear and have a new band around 1385 cm -1 which is attributed to N-O stretching…”

“…The slop and intercept of the linear plot of qt vs. t 1/2 allow for the determination of the K i and C from equation ( 7) (Figures 10,11 ). , 2015).…”

“…R is temperature (K) and T is the gas constant (8.314 J/mol K) .Table (11) lists the estimated thermodynamic parameters.…”