Abstract
Controlled release formulations have been shown to have potential in overcoming the drawbacks of conventional plant growth regulators formulations. A controlled-release formulation of 1-naphthylacetic acid (NAA) and indole-3-butyric acid (IBA) simultaneous intercalated MgAl-layered double hydroxides (LDHs) was prepared. The synthetic nanohybrid material was characterized by various techniques, and release kinetics was studied. NAA and IBA anions located in the gallery of MgAl-LDHs with bilayer arrangement, and the nanohybrids particles were of typical plate-like shape with the lateral size of 50–100 nm. The results revealed that NAA and IBA have been intercalated into the interlayer spaces of MgAl-LDHs. The release of NAA and IBA fits pseudo-second-order model and is dependent on temperature, pH value, and release medium. The nanohybrids of NAA and IBA simultaneously intercalated in LDHs possessed good controlled release properties.
Highlights
In recent years, plant growth regulators (PGRs) including indole-3-butyric acid (IBA) and 1-naphthalene acetic acid are widely used in agriculture to increase plant growth and reproduction [1, 2]
The formation of carboxylate anion was done by dissolving the acid in NaOH solution and the anion was intercalated between inorganic lamella of the MgAl-layered double hydroxides (LDHs) as evidence from powder X-ray and Fourier transform infrared spectroscopy (FT-IR) studies and will be discussed later
The X-ray diffraction (XRD) pattern of the contrast MgAl-CO3-LDHs (Figure 1(b)) exhibits typical characteristics of the LDHs phase corresponding to the basal spacing of 0.75 nm, which agrees well with the literature data [27]
Summary
Plant growth regulators (PGRs) including indole-3-butyric acid (IBA) and 1-naphthalene acetic acid (αNAA) are widely used in agriculture to increase plant growth and reproduction [1, 2]. Layered double hydroxides (LDHs) have attracted intensive attentions because of their potential in functional materials [13,14,15,16,17,18,19,20,21,22]. The application of plant growth regulators intercalated LDHs has been reported. Qiu and Hou [12] prepared the indole-3-butyric acid intercalated LDHs and studied the release kinetics. The preparation and simultaneous controlled release of NAA and IBA anions from LDHs interlayer have not been reported in the literature. Journal of Nanomaterials synthetic nanohybrid material was characterized by various techniques, and release kinetics was studied
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
