Composite ultrafiltration membrane tailored by MOF@GO with highly improved water purification performance

Abstract

Developing advanced filtration membrane with high flux, good solute rejection and excellent antifouling performance is highly demanded. Hydrophilic graphene oxide (GO) nanosheets are attractive fillers for the preparation of composite membranes for water purification. However, strategies that can fully exploit the advantages and remedy the drawbacks of GO nanosheets are still needed. In this work, UiO-66 was specifically anchored to the GO layers as a porous modifier. The incorporated UiO-66 can effectively prevent the GO layers from stacking and introduce unique properties into the composite (UiO-66@GO). A series of novel composite membranes were prepared with the obtained UiO-66@GO composite and polyethersulfone (PES). As a result, the prepared composite membranes

Metal‐Organic Frameworks/Graphene‐Based Materials: Preparations and Applications

“…As we all know, water is one of the most important substances in human's lives, so water quality has a great effect on the health of humans . Nevertheless, because of the expansion of industrial factories and a rapidly increasing population, more and more contaminants are poured into environmental water, threatening the lives of humans and wildlife.…”

“…Currently, dye wastewater pollution is becoming an increasingly frightening threat to human beings . The following paragraphs review the published reports regarding the adsorption performance of MOF/graphene‐based materials for some main dye pollutants including methyl orange (MO), rhodamine B (RhB), malachite green (MG), direct red (DR), methylene blue (MB), and Congo red (CR).…”

“…Accounting for the acidic functional groups of GO attracting negative charges to the surface of the membranes, the unfilled GO/PES membrane has an excellent rejection ratio for MO and DR. Nevertheless, the addition of MOFs further enhanced the rejection capacity to a higher degree, while avoiding the stacking effect of GO and bringing the composite membrane a superior molecular sieve property …”

A novel sensing layer based on metal–organic framework UiO-66 modified with TiO2–graphene oxide: application to rapid, sensitive and simultaneous determination of paraoxon and chlorpyrifos

“…30 After UiO-66 modification by TG, all diffractions belong to UiO-66 were well preserved, indicating that the presence of TG did not disturb the formation of crystals of UiO-66. [35][36][37] Notably, the broadened diffraction peaks indicated that T on the surface of GO (in the TG@UiO-66 matrix) has a low degree of crystallinity. 38 Furthermore, the absence of GO diffraction is due to the insertion of UiO-66 between TG layers that effectively reduces the van der Waals binding energy between the GO sheets and improves the layer exfoliation and also high dispersion of TG layers during the nanocomposite preparation can be another reason for this observation.…”

A Sm-MOF/GO nanocomposite membrane for efficient organic dye removal from wastewater

“…17 Thus, researchers focused on GO and metal-organic framework (MOF) nanocomposites. [18][19][20][21] As a network-like compound with the advantages of an adjustable structure, high porosity and large specic surface area, 22 MOF is constructed by combining a metal center and organic linkers via coordination bonds. The ultra-high specic surface area provides MOF with excellent adsorption properties for gas separation and storage, but weak dispersion forces attract small molecules, limiting the practical applications.…”