تحضير وتشخيص المركبات النانوية الهجينة ودراسة حركية السيطرة على تحرر فيتامين C من بين طبقات اوكسيد الخارصين بطريقة التبادل الايوني المباشر

Abstract

This study presents the synthesis of nano hybrids compound through interaction of ascorbic acid inside zinc oxides layers by using indirect ion exchange method. We had by character this compound by Fourier Transform Infrared Spectroscopy (FT-IR) and proving the nano hybrid formation by see new spectroscopic signals with comparison with signal of zinc of zinc oxide layers that evidence for success the interaction process. The kinetic studies for release V.C.by using Lagregran equations in different aqueous solutions as (Na2CO3 , Na3PO4) and differentconcentrations (0.005,0.05,0.5)M by this results the kinetic release is governed by Pseudo-second order rate expression. The effect of velocity of diffusion on ionic exchange process also studied, the higher steric effect for both solutions(Na2CO3Na3PO4) is at lower concentration (0.005 M). Study the percentage for both solution at higher concentration (0.5 M) also we can see the higher release time for both solutions at higher concentration (0.5 M).