Synthesis of Fe3O4@chitosan@ZIF-8 towards removal of malachite green from aqueous solution: Theoretical and experimental studies

ZIF-8 metal organic framework materials as a superb platform for the removal and photocatalytic degradation of organic pollutants: a review

“…The pseudo-second-order model was more applicable compared to the pseudo-first-order model in describing the adsorption pathway due to its R 2 correlation coefficient of 0.999 compared to that of the pseudo-first-order model of 0.813. 73 Zadvarzi et al 97 reported the fabrication of a magnetic chitosan (chitosan@Fe 3 O 4 ) coated with ZIF-8 for the removal of the cationic dye malachite green. In this work, several parameters were studied to improve the performance of the ZIF-8@chitosan@Fe 3 O 4 hybrid for the efficient adsorption of MG, and the optimal conditions were found to be 40 mg of adsorbent, pH = 7, 10 ppm initial concentration, a temperature of 25 °C and 40 min reaction time.…”

“…Moreover, the lowest adsorption energy value and long bonding distances indicated that the adsorption of MG was according to van der Waals forces, confirming the occurrence physisorption. 97 Mahmoodi et al 74 successfully deposited ZIF-8 crystals on chitosan/polyvinyl-alcohol electrospun nanofibers (ZIF-8-CS/PVA-ENF) to eliminate malachite green from aqueous medium. An enhancement in the effective surface area and porosity was observed after the successful synthesis of ZIF-8 applied on CS/PVA for the second cycle (ZIF-8-CS/PVA-ENF2), and the characterization images of each material are displayed in Fig.…”

Facile supramolecular strategy to construct solid fluorophore@metal–organic framework composites

“…Given the difficulty of growing single crystals suitable for X-ray crystallographic analysis, molecular modelling was performed to obtain further insight into the architectural features of the fluorophore@MOF composite. Computational studies of ZIF-8 complexes can be broadly grouped into several classes: DFT calculations of interaction energies between ZIF-8 components (Zn clusters) and small molecules, [78][79][80][81] periodic DFT calculations of the extended solid-state structures with or without guests, [81][82][83][84][85][86][87] and Monte Carlo simulations of small molecule adsorption and diffusion. [87][88][89] Our aim was to determine if FMe520 could be encapsulated into the ZIF-8 sodalite (SOD) cage without significant destabilization and if evidence could be obtained as to the preferred orientations between the functional groups of FMe520 and the structural elements of ZIF-8.…”

Fabrication of novel porous ZIF-67/PES composite microspheres and the efficient adsorption of triphenylmethane dyes from water

“…FA is anionic, whereas MG and CV are cationic. 2,3 MG and CV are not only utilized for dyeing silk, leather, and paper, but they also play an important part in treating parasitic, fungal, and bacterial infections of fish and fish eggs. 4 The illegal use of MG, FA, and CV dyes is becoming a serious environmental problem given the low production costs of these dyes.…”