title: Herbicide-intercalated zinc layered hydroxide nanohybrid for a dual-guest controlled release formulation.
abstract: Herbicides, namely 4-(2,4-dichlorophenoxy) butyrate (DPBA) and 2-(3-chlorophenoxy) propionate (CPPA), were intercalated simultaneously into the interlayers of zinc layered hydroxide (ZLH) by direct reaction of zinc oxide with both anions under aqueous environment to form a new nanohybrid containing both herbicides labeled as ZCDX. Successful intercalation of both anions simultaneously into the interlayer gallery space of ZLH was studied by PXRD, with basal spacing of 28.7 Å and supported by FTIR, TGA/DTG and UV-visible studies. Simultaneous release of both CPPA and DPBA anions into the release media was found to be governed by a pseudo second-order equation. The loading and percentage release of the DPBA is higher than the CPPA anion, which indicates that the DPBA anion was preferentially intercalated into and released from the ZLH interlayer galleries. This work shows that layered single metal hydroxide, particularly ZLH, is a suitable host for the controlled release formulation of two herbicides simultaneously.
authors: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia.
authors: Mohd Zobir
authors: MZ
authors: Hussein
authors: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia.
authors: Nor Shazlirah Shazlyn
authors: NSS
authors: Abdul Rahman
authors: Faculty of Applied Science, Universiti Teknologi MARA (UiTM), Shah Alam, Selangor 40450, Malaysia.
authors: Siti H
authors: SH
authors: Sarijo
authors: Department of Chemistry, Faculty of Science, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia.|Advanced Materials and Nanotechnology Laboratory, Institute of Advanced Technology (ITMA), Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia.
authors: Zulkarnain
authors: Z
authors: Zainal
mesh_terms: D003692:Delayed-Action Preparations / Q000737:chemistry; D006540:Herbicides / Q000737:chemistry*; D006878:Hydroxides / Q000737:chemistry*; D049329:Nanostructures / Q000737:chemistry*; D015032:Zinc / Q000737:chemistry; D017967:Zinc Compounds / Q000737:chemistry*
chemical_list: D003692:Delayed-Action Preparations; D006540:Herbicides; D006878:Hydroxides; D017967:Zinc Compounds; D015032:Zinc; C052745:zinc hydroxide