Publication: Synthesis, characterization and controlled release properties of zinc�aluminium-beta-naphthoxyacetate nanocomposite
Date
2017
Authors
Jubri Z.
Yusoff N.Z.A.M.
Sarijo S.H.
Marsom E.S.
Hussein M.Z.
Journal Title
Journal ISSN
Volume Title
Publisher
Springer New York LLC
Abstract
An organic�inorganic nanohybrid nanocomposite was synthesized by co-precipitation method using beta-naphthoxyacetate (BNOA) as guest anion and zinc�aluminium layered double hydroxide (Zn�Al-LDH) as the inorganic host. A well-ordered nanohybrid nanocomposite was formed when the concentration of BNOA was 0.08�M and the molar ratio of Zn to Al, R�=�2. Basal spacing of layered double hydroxide containing nitrate ions expanded from 8.9 to 19.5�� in resulting of Zn�Al-BNOA nanocomposite was obtained indicates that beta-naphthoxyacetate was successfully intercalated into interlayer spaces of layered double hydroxide. It was also found out the BET surface area increased from 1.13 to 42.79�m2�g?1 for Zn�Al-LDH and Zn�Al-BNOA nanocomposite, respectively. The BJH average pore diameter of the synthesized nanocomposite is 199�� which shows mesoporous-type of material. CHNS analysis shows the Zn�Al-BNOA nanocomposite material contains 36.2�% (w/w) of BNOA calculated based on the percentage of carbon in the sample. Release of BNOA from the lamella of Zn�Al-BNOA was controlled by the zeroth and first order kinetics at the beginning of the deintercalation process up to 200�min and controlled by pseudo-second order kinetics for the whole process. This study suggests that layered double hydroxide can be used as a carrier for organic acid herbicide controlled release formulation of BNOA. � 2016, Springer Science+Business Media New York.
Description
Carbon; Characterization; Herbicides; Nanocomposites; Nanostructured materials; Precipitation (chemical); Weed control; Zinc; Beta-naphthoxyacetate; Controlled release formulations; Controlled release properties; Coprecipitation method; Deintercalation process; Hydrotalcites; Layered double hydroxides; Pseudo second order kinetics; Aluminum