Deposition of MOFs on Polydopamine-Modified Electrospun Polyvinyl Alcohol/Silica Nanofibers Mats for Chloramphenicol Adsorption in Water

Abstract

Nanofiber mats produced by electrospinning, with the advantages of specific surface area, porosity and chemical tenability, are an ideal support material for deposition of metal[Formula: see text]organic framework (MOF) crystals. In this study, four types of MOFs (MIL-53(Al), ZIF-8, UiO-66-NH2 and NH2-MIL-125(Ti)) were deposited on polydopamine (PDA)-modified electrospun polyvinyl alcohol (PVA)/SiO2 organic[Formula: see text]inorganic hybrid nanofiber mats by bulky synthesis. Because of the formation of Si–O–C–O–Si bridges between PVA chains and silica network, electrospun PVA/SiO2 organic[Formula: see text]inorganic hybrid nanofiber mats are quite stable in water or organic solvents and at high temperature are suitable as supports for MOFs deposition. The PDA layer, which exhibits a powerful adhesive ability to attach foreign objects, can effectively improve growth of MOFs on the surface of PVA/SiO2 nanofiber mats. The obtained MOF composites combining the unique properties of electrospun nanofibers mats and MOFs particles become flexible and tailorable, greatly expanding the application range of MOFs materials. The synthesized MOF composites were used to adsorb chloramphenicol (CAP) in water. It was found that the four MOF composites could remove CAP from water effectively and MIL-53(Al) composite had the highest adsorption capacity due to the higher specific surface area.

Macroscopic MOF Architectures: Effective Strategies for Practical Application in Water Treatment

“…Adsorption of anionic dye MO, selectivity toward MO from an anionic/cationic dye mixture of MO/MB [111] Direct mixing 3D aerogel UiO-66-NH 2 -CS aerogel monolith (UNCAM) Adsorption of Pb(II) [112] In situ growth 3D aerogel Ni/Co-MOF@CMC aerogels Adsorption of tetracycline hydrochloride and bacteriostatic agent [113] Direct mixing 3D aerogel UiO-66/cellulose aerogels Adsorption of MB and MO [114] Direct mixing 3D aerogel ZIF-8 (ZIF-67)/AG aerogel Adsorption of RhB [115] Direct mixing 3D Carbon gel 3D porous carbon monolith (PZ-2-C) Adsorption of MB and MO [116] Tremendous efforts have been undertaken to seek feasible methods and synthesis strategies and applications in water treatment of typical MOF-based macroscopic materials are summarized in Table 1. [17,[98][99][100][101][102][103][104][105][106][107][108][109][110][111][112][113][114][115][116] These catalysts can simplify the process of water treatment, improve water treatment capacity, and avoid the secondary pollution caused by powder MOF.…”

Electrospun Functional Nanofiber Membrane for Antibiotic Removal in Water: Review

“…As an excellent adsorbent, MOFs has also attracted wide attention in the field of antibiotic adsorption [ 155 , 156 , 157 , 158 , 159 ]. Aowen Li et al [ 13 ] demonstrated that electrospun PVA/SiO 2 fiber membrane modified with dopamine could be loaded with MOFs materials for adsorption of antibiotics in water. The adsorption mechanism of MOFs to antibiotics mainly belongs to physical adsorption and has extremely high adsorption capacity without changing the pH value of the water environment.…”

“…Many kinds of pollutants, such as colored dyes [ 3 , 4 , 5 ], heavy metal ions [ 6 , 7 , 8 ], harmful bacteria [ 9 , 10 , 11 ] and drugs [ 12 , 13 , 14 ], are harmful to water. Among them, antibiotics have attracted attention as a new water pollutant [ 15 , 16 ].…”

Occurrence, toxicity and adsorptive removal of the chloramphenicol antibiotic in water: a review

“…It was reported that antibiotic pollution over long-term disposure is a crucial factor in rising gene resistance in many bacteria (Chaturvedi et al 2021 ). Many studies indicated that antibiotic pollution reduces the quality of water sources in rivers, lakes, reservoirs and irrigation systems (Li et al 2020a , b , c , d ; Xu et al 2021 ).…”

“…Indeed, this method offers many outstanding advantages such as high efficiency, reusability, flexible operation, environmental friendliness, and cost saving (Ahammad et al 2021 ). In particular, adsorbent materials are very diverse, including carbon-based materials (Cheng et al 2019 ), polymers (Idris et al 2020 ), metal–organic frameworks (Li et al 2020a , b , c , d ), and mineral materials (Sun et al 2017 ). Therefore, performance of adsorbents for the removal of chloramphenicol from wastewater should be profoundly evaluated.…”