Simple preparation of UiO-66-NH2-modified microsphere layer/nanofibrous membrane by coaxial spinning for purification of complex wastewater

Facile Prepared MOF-OH-PAN Nanofiber for Separation Co(II) from Waste Batteries

“…The XRD results for MOF-OH, PAN, and MOF-OH-PAN NFs are presented in Figure 1a. The presence of diffraction peaks at 2θ = 8.8°, 12.2°, and 25.8° in pure MOF-OH particles, corresponding to the crystallographic planes of (002), (022), and (024) respectively, aligns with the characteristic XRD diffraction peaks of the typical zirconium-based MOF material UiO-66, providing evidence of the successful preparation of MOF-OH [18,22]. The identification of a peak at 2θ = 16.8° confirms the presence of the PAN polymer, offering conclusive proof of its integration into the material structure.…”

“…The stretching mode bands of the O-H group in MOF-OH were observed at 1245 cm −1 and 1440 cm −1 . The asymmetric and symmetric stretching vibrations of the C=O bond in MOF-OH were observed at 1634 cm −1 [22]. From the FT-IR spectrum, the characteristic peaks belonging to MOF-OH particles and PAN polymer can both be noticed in MOF-OH-PAN NFs, indicating the successful preparation of the composite.…”

“…Metal-organic frameworks (MOFs) are crystalline materials, the porous structure of which is constructed by the coordination of aromatic carboxylic acids or multi-dentate organic ligands with central metal ions [13][14][15][16][17][18]. MOFs have a wide variety, abundant porosity, steerable pore size, and high surface area, making them ideal for preparing adsorbents [19][20][21][22][23]. Li et al reported on a composite fiber material prepared through the in situ growth of Ce-based MOF on electrospun NFs using a solvothermal method.…”

One-Step Prepared Multifunctional Polyacrylonitrile/MIL-100(Fe) Membrane with High-Density Porous Fibers for Efficient Dye/Oil Wastewater Remediation

“…Moreover, the adsorption kinetic models (pseudofirst-order kinetic model and pseudo-second-order kinetic model) and adsorption isotherm models (Langmuir model and Freundlich model) of MB and CR for the C-PAN/MIL-100(Fe)-0.5 membrane were applied to analyze the adsorption behaviors. Here, the correlation equations were as follows (eqs4−7): 33,34 Q Q Pseudo first order model:…”

“…Moreover, the adsorption kinetic models (pseudo-first-order kinetic model and pseudo-second-order kinetic model) and adsorption isotherm models (Langmuir model and Freundlich model) of MB and CR for the C-PAN/MIL-100(Fe)-0.5 membrane were applied to analyze the adsorption behaviors. Here, the correlation equations were as follows (eqs –): , Pseudo ‐first ‐order .25em model : .25em Q t = Q e false( 1 − e − k 1 t false) Pseudo ‐second ‐order .25em model : .25em Q t = k 2 Q e 2 t 1 + k 2 Q e t where Q t (mg g –1 ) and Q e (mg g –1 ) represent the adsorption capacity at time t and equilibrium state, respectively. k 1 and k 2 represent rate constants of corresponding adsorption kinetics. Langmuir .25em isotherm : .25em Q e = Q m K L C e 1 + K L C e Freundlich .25em isotherm : .25em Q e = K F C e 1 n where Q m (mg/g) and Q e values are the maximum adsorption capability at time t and equilibrium state, respectively.…”