Current location: JICS Archive > Vol. 7 > Supplement. 1 > Articles : 3
Synthesis and Characterization of Hippurate-Layered Double Hydroxide Nanohybrid and Investigation of its Release Property
M.Z. Husseina,b,*, F.A. Bahara and A. Hj Yahayac
aAdvanced Material and Nanotechnology Laboratory, Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, 43000 UPM, Serdang, Selangor Malaysia
bDepartment of Chemistry, Faculty of Science, Universiti Putra Malaysia, 43000 UPM, Serdang, Selangor Malaysia
cCentre of Foundation Studies for Agricultural Science, Universiti Putra Malaysia, 43000 UPM, Serdang, Selangor Malaysia
The anion of hippuric acid, hippurate (A-), as an organic guest was intercalated into the interlayers of anionic clay, Zn/Al hydrotalcite-like or layered double hydroxides (LDH) host by direct co-precipitation method from aqueous solution for the formation of new nanohybrid compounds, Zn/Al-hippurate nanohybrids (ZAHs). Various Zn/Al molar ratios (R) = 3-5 and concentrations of HA (0.06-0.15 M) were used for the synthesis. ZAHs synthesized, using 0.15 M HA, was found to give well-ordered layered nanohybrid materials with an increase of the basal spacing to 19.6-21.0 Å compared to 8.8-9.0 Å in the LDHs. The increase in the basal spacing is due to the insertion of A- organic moiety into the LDH interlayers. Formation of the host-guest type of material was confirmed by XRD, FTIR, TGA/DTG and compositional analysis. The release of the intercalated guest was found to be tunable in a controlled manner by Zn/Al molar ratio and is governed by pseudo-second order kinetics. Thus, by varying the experimental conditions, the release property of the guest anion can be tailored as required.
Keywords: Anionic clay, Hippuric acid, Intercalation, Layered double hydroxides, Hydrotalcite, Nanohybrid
