Preparation and sustained-release study of Litsea cubeba essential oil inclusion complex with γ-cyclodextrin-metal–organic frameworks

Chemical and Biological Technologies in Agriculture, Journal Year: 2023, Volume and Issue: 10(1)

Published: Sept. 27, 2023

Abstract Background Litsea cubeba essential oil (LCEO) is a food additive that requires encapsulation to delay its release due irritating nature. To identify an appropriate inclusion material, gamma (γ)-cyclodextrin (CD)-metal organic frameworks (MOF) were prepared, and the sustained of complex (IC) was studied. Results The γ-CD-MOF formed using γ-CD, potassium hydroxide (KOH), cetyltrimethylammonium bromide (CTAB), silane coupling agents through vapor diffusion method. highest encapsulated rate achieved 26.02%, with temperature 50 °C, stirring time 2.5 h, LCEO γ-CD dosage ratio 1:8. During adsorption test, amount gradually increased within first 180 min. However, after this time, there no significant change in LCEO, indicating had reached equilibrium. average IC 9.76% at 11 h. By comparison, 9.30% 10 min, resulting index 0.349. Under ultraviolet (UV) scanning, sustained-release solution exhibited strong characteristic citral absorption peak 238 nm. Moreover, under infrared spectroscopy intensity 1.19 times higher than blank 1676 cm −1 . IC, as observed scanning electron microscope, round pellets diameter 40–60 μm. Energy dispersive images showed uniform distribution sulfur elements. In X-Ray diffraction, diffraction peaks found 5.27°, 7.45°, 10.54°, 12.08°, 14.20°, 14.92°, 15.84°, 16.68°, 19.24°, 21.80°, 23.69°, LCEO. Brunauer–Emmett–Teller (BET) testing revealed surface area 5.089 m 2 /g, pore 3.409 nm by Barrett–Joyner–Halenda (BJH) Conclusion These data demonstrated effect superior γ-CD. kinetics curve followed Quasi-primary model, while adhered Ritger–Peppas model. Furthermore, behavior primarily governed Fick mechanism, which advantageous for achieving UV spectrum, (IR), microscopy–energy (SEM–EDS), X-ray (XRD), BET techniques confirmed successful formation γ-CD-MOF. This study offers promising technical delaying improving product Graphical

Language: Английский

Post-synthetic modification of zirconium-based metal-organic frameworks for enhanced simultaneous adsorption of heavy metal ions and organic dyes

Journal of Solid State Chemistry, Journal Year: 2024, Volume and Issue: 339, P. 124987 - 124987

Published: Aug. 30, 2024

Language: Английский

Oxalic acid-functionalized metal-organic framework MIL-125/carboxylic magnetite composites for adsorptive Pb(II) removal

Materials Chemistry and Physics, Journal Year: 2024, Volume and Issue: unknown, P. 130315 - 130315

Published: Dec. 1, 2024

Language: Английский