Herbicide-intercalated zinc layered hydroxide nanohybrid for a dual-guest controlled release formulation

• 發表在: International Journal of Molecular Sciences
• 主要作者: 2-s2.0-84862501716
• 格式: Article
• 語言: English
• 出版: 2012
• 在線閱讀: https://www.scopus.com/inward/record.uri?eid=2-s2.0-84862501716&doi=10.3390%2fijms13067328&partnerID=40&md5=eb297f51f572a97b865d570d4a7805fd

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. © 2012 by the authors; licensee MDPI, Basel, Switzerland.