Novel bimodal micro?mesoporous Ni50Co50-LDH/UiO-66-NH2 nanocomposite for Tl(I) adsorption

Ni50Co50-layered double hydroxide/UiO-66-NH2 metal–organic framework nanocomposite (Ni50Co50-LDH/UiO-66-NH2 NC) was synthesized through a facile ultrasonic-assisted hydrothermal method. UiO-66-NH2 MOF nanocrystals were in situ grown on the surface of ultrathin 2-dimensional functionalized Ni50Co50-LDH nanosheets. Using this method, uniform architecture obtained by uniformly distributing Ni50Co50-LDH. The LDH/MOF NC possesses essential properties potential nanoadsorbent such as high area (907 m2 g?1), large pore volume (0.91 cm3 bimodal micro-mesoporous structure, and chemical functionality. Accordingly, Ni50Co50-LDH/UiO-66-NH2 used an adsorbent for uptake toxic thallium (I) from water. Isotherm, thermodynamic, kinetic studies conducted to gain better insight into adsorption mechanism (s) involved removal process. Langmuir pseudo-first-order models present fit isotherm data, respectively, maximum capacity found be 601.3 mg g?1 after non-linear fitting analysis (pH=7.0, solution volume=30 mL, initial concentration=50 L–1, contact time=15 min, temperature=293 K). Thermodynamic parameters estimated (?H0=+64.979 kJ mol?1, ?S0=+0.335 mol?1 K?1, ?G0=–33.176 –39.876 mol?1) it that is endothermic spontaneous with physicochemical nature.