Preparation Of New Materials Based On Functional MOFs And Their Application To The Removal Of Environmental Pollutants

Pickering emulsion is a type of emulsion formed by the adsorption of solid particles on the oil-water interface to stabilize the two phases of oil and water.Compared with the traditional surfactant-stabilized emulsion,it has the advantages of production saving,environmental friendliness and stable performance.It has been widely used.In the fields of pharmaceutical synthesis,paper chemicals,cosmetics,functional material preparation,Janus particles,etc.Metal-organic frameworks（MOFs）are porous framework materials formed by metal ions and organic ligands through coordination bonds,which have the advantages of high specific area,high porosity,adjustable pore size,and structural diversity.They have been widely used in adsorption,Catalysis,sensing,drug delivery and other fields.Airgel is a three-dimensional porous material with ultra-low density and high specific surface area.Airgel materials with multiple functions have been used in various repair processes,such as cleaning oil spills,dye degradation,gas capture,water filtration,etc.On this basis,the preparation and application of MOFs multifunctional new materials were studied.Multifunctional MOFs were applied to Pickering lotion,MOFs new materials with unique advantages were prepared by Pickering lotion template method and applied to water pollution treatment,MOFs were applied to aerogel for efficient adsorption of formaldehyde gas.MIL-101（Fe）/cellulose-nanocrystal（CNC）hybrid nanoparticles（MCs）with high photocatalytic activity were prepared by in situ growth.Owing to their unique amphiphilicity and interfacial adsorption,the Pickering emulsions stabilized by MCs showed uniform particle size and stability.The MCs were uniformly adsorbed at the oil–water interface of the emulsion and dispersed in the water phase through a three-dimensional（3D）network with clusters.This facilitated complete contact of the MCs with pollutants,thereby significantly increasing the photocatalytic efficiency.The tuneable wettability of MIL-101（Fe）induced by CNCs considerably affected the stabilization and photocatalytic degradation performance.At 0.5 wt%CNC,the MCs had a three-phase contact angle of 92°,resulting in the highest photocatalytic degradation rate and emulsion stability of the samples studied herein.An emulsion was produced with a constant emulsification index of 100%by using 0.4 wt%MCs and an oil-phase volume fraction of approximately 0.2.The MCs-stabilised emulsion system exhibited high photocatalytic degradation efficiency for Rhodamine B.Moreover,the MCs could be recycled several times while ensuring a degradation efficiency within an acceptable range.This is a green and sustainable new method for degrading organic pollutants in water.we have fabricated a novel MIL-101（Fe）/Polysulfone（MP）composite hollow microsphere via a Pickering emulsion template approach for the application in photo-Fenton degradation of methylene Blue（MB）.Our results revealed that the loading of MIL-101（Fe）plays a crucial role in determining the porosity,density,and optical properties of the MP composite microspheres.The MP composite microspheres exhibited excellent MB removal performance and showed a higher adsorption rate compared to MIL-101（Fe）and Polysulfone（PSF）.The enhanced performance can be attributed to the porous structure and electrostatic attraction between MB⁺and negatively charged PSF materials.Additionally,the MP composite microspheres displayed good degradation efficiency and a high degree of reusability,remaining stable even after 5 cycles.These results demonstrate that the MP composite microsphere is a highly effective,reusable,and durable photocatalyst for the treatment of water and organic pollutants.Using the biodegradable polymer polyvinyl alcohol（PVA）as the airgel substrate,UiO-66-NH₂@PVA composite airgel was prepared by physical blending followed by freeze-drying.The introduction of UiO-66-NH₂ into the PVA matrix not only makes the composite airgel have a more obvious hierarchical porous structure,but also can significantly reduce the pore size and significantly increase the BET specific surface area and pore volume of the PVA aerogel.When the addition amount of UIO-66-NH₂ and PVA is 0.1:0.9,UIO-66-NH₂@PVA composite airgel exhibits the most excellent formaldehyde gas adsorption performance,which is an environmentally friendly bio-based material for harmful gases in the air.The removal aspect provides a new use.