RESUMO
Objective: Intercalations of plant growth regulator 4-chloro phenoxy acetate [4CPA] with zinc oxide [ZnO], developed using ZnO-layered hydroxide [ZLH] as host material and 4CPA as a guest
Methods: Ion exchange technique via sol-gel method synthesized under aqueous environment, resulted in the formation of inorganic-organic nanotube materials
Results: The release of 4CPA from its nanohybrid was found to occur in a controlled manner, governed by pseudo-second order kinetics model. The maximum amount of 4CPA released was governed by pseudo-second order kinetics model. Powder X-ray diffraction showed that the basal spacing of the nanohybrid was developed with the increasing of 4CPA concentrations; the maximum concentration of 0.2M shows an interlayer basal of 1.9 nm. FTIR study showed that the intercalated 4CPA-ZnO spectral feature is generally similar to that of 4CPA, but with bands sightly shifted due to the formation of host-guest nanotubes
Conclusion: The resulted nanotubes were characterized by using scanning electron microscopy [SEM], and transmission electronic microscope [TEM], shows a uniform nanoparticles and monodisperse with average diameter of 35 nm, which correlated a very well with size scale obtained from XRD data. The development of crystals is the function of concentrations