Synthesis of microporous aromatic framework with scholl-coupling reaction for efficient uranium (VI) capture

Bai, Jianwei; Ma, Xiaofei; Zhang, Jingjie; Yan, Huijun; Wang, Kewei; Wang, Jun

doi:10.1016/j.colsurfa.2020.125131

Cited by 10 publications

(6 citation statements)

References 49 publications

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“…The adsorption capacity of the HOPNs‐AO for U(VI) is related to the pH value of the initial uranium solution. Under acidic conditions, uranium exists in the UO2+ 2 and UO 2 OH + and produces static repulsive force with protonation of amidoxime groups [16] . In alkaline solutions, uranium forms complexes with hydroxides and carbonate, such as UO 2 (CO 3 )2−2 and UO 2 (OH)−3 [17] .…”

Section: Resultsmentioning

confidence: 99%

“…Under acidic conditions, uranium exists in the UO2 + 2 and UO 2 OH + and produces static repulsive force with protonation of amidoxime groups. [16] In alkaline solutions, uranium forms complexes with hydroxides and carbonate, such as UO 2 (CO 3 )2À 2 and UO 2 (OH)À 3. [17] As pH gradually increases, the surface charge of the material changes from positive to negative.…”

Section: Adsorption Property Testmentioning

confidence: 99%

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Synthesis of Amidoxime‐modified Hollow Organic Porous Nanospheres for Efficient Uranium Adsorption from Aqueous Solution

Han

Liu

et al. 2023

ChemistrySelect

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Despite its disadvantages, nuclear power still has some advantages over traditional fossil fuels and could have a part to play in solving the current energy crisis. Among them, nuclear waste (mainly uranium and plutonium) is the inevitable product of the extensive development and application of nuclear power, and its recovery and storage technology are on the focus of scientific research. Herein, amidoxime‐modified hollow organic porous nanospheres (HOPNs‐AO) were prepared by co‐hyper‐crosslinking from polylactide‐b‐polystyrene (PLA‐b‐PS) diblock copolymer and benzeneacetonitrile based on the Scholl coupling reaction. Owing to the specific adsorption property of amidoxime groups for uranyl ions, the obtained HOPNs‐AO exhibited excellent adsorption capacity (qmax=519.5 mg ⋅ g−1), chemical stability, and selectivity for uranyl ions in an aqueous solution. In addition, HOPNs‐AO can still maintain more than 80 % adsorption capacity in the fifth cycle. The above results indicate that the successful design of this material provides a meaningful way for the recovery of uranium ions in aqueous solution.

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Section: Resultsmentioning

confidence: 99%

Section: Adsorption Property Testmentioning

confidence: 99%

Synthesis of Amidoxime‐modified Hollow Organic Porous Nanospheres for Efficient Uranium Adsorption from Aqueous Solution

Han

Liu

et al. 2023

ChemistrySelect

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“…Hyperbranched cross-linked polymeric adsorbents (HCPAs) are a group of promising candidates with abundant functional groups, outstanding chemical and thermodynamic durability, significant radiation reliability, and low density. − The chemical and physical properties of this polymer can be tailored through copolymerizing with monomers that contain particular functional substituents, modification after polymerization, or inclusion of functional materials before polymerization for cross-linking. , Polymeric hydrogels also showed the sorption of uranyl ions. However, the adsorption capacity was extremely low (7.71 × 10 –4 –10.20 × 10 –4 mol/g). − A variety of scholl-coupled microporous polymers were prepared by Bai et al, in order to broaden the use of hyper cross-linked polymeric resins (HCPRs) for the extraction of U. , A new hyper-cross-linked phosphate-based polymer (HCPP) was reported by Di et al, for U separation from aqueous solution, because of its cross-linked network structure, exceptional chemical stability, and recyclability . However, there is no suitable way to adsorb and desorb U since the adsorbents are powdery in nature .…”

Section: Introductionmentioning

confidence: 99%

Efficient Adsorption and Desorption of Uranium(VI) Using a Polymeric Adsorbent: A Combined Theoretical and Experimental Approach with Real-Life Alkaline Leach Liquor

Das,

Jana,

Das

et al. 2024

Ind. Eng. Chem. Res.

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Alkaline leaching is used for the extraction of uranium from rarely available carbonate ore. A hyperbranched cross-linked polymeric adsorbent (HCPA) was developed for selective recovery of uranium(VI) (U) from real-life alkaline leach liquor. HCPA was synthesized using the free radical copolymerization of acrylamide and N, N-methylene bis(acrylamide). In addition, potassium persulfate (as the initiator) and dodecanethiol (as the brancher) were used to transfer the radicals for faster chain formation and smooth branching of the long-chain polymer. Several methods were used extensively to characterize the adsorbent. The Langmuir maximum U adsorption capacity of HCPA was 1012 mg/g at 303 K, and 98% of U was removed from alkaline leach liquor. U was adsorbed at pH 8.5 in the presence of various interfering co-ions and desorbed at pH 11.5 in the form of sodium diuranate (Na 2 U 2 O 7 ) precipitate. The adsorption was monolayer, exothermic, and spontaneous in nature. The C−N, CO− NH 2 , and C−OH groups of HCPA interacted with uranyl ions initiating the coordinative and electrostatic interactions leading to U adsorption. Continuous fixed-bed column runs were performed using the actual leach liquor, and a fundamental kinetic model was used to quantify the performance of columns. The transport parameters were estimated from the model, and scaling-up calculations were performed using these parameters. Five adsorption−desorption cycles were conducted to determine the reusability and structural stability of the synthesized polymeric adsorbent.

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“…Recently, low-cost plant-derived phenols or polyphenols with a remarkable high content of catechol and Gallic acid groups have been proved to form multifunctional coatings of excellent properties, which show similar complex mechanism of reactions like dopamine-derived coatings. [19][20][21][22] As a nontoxicity and low-cost natural polyphenol, tannic acid (TA) has attracted considerable interest owing to its desirable anchoring and coordinating ability by forming TA polymeric layers onto almost all types of substrates by pH-induced oxidative polymerization. [23][24][25][26] Massive catechol groups of TA can enhance surface wettability and chemical activity with matrix resin.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, the high cost of dopamine is undesirable in practical application of fiber surface modification. Recently, low‐cost plant‐derived phenols or polyphenols with a remarkable high content of catechol and Gallic acid groups have been proved to form multifunctional coatings of excellent properties, which show similar complex mechanism of reactions like dopamine‐derived coatings 19‐22 …”

Section: Introductionmentioning

confidence: 99%

Grafting of the hierarchical natural tannic acid and polyethyleneimine onto carbon fiber for significantly improved surface/interface properties

Cui

Liu²,

et al. 2020

Polymers for Advanced Techs

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The interfacial adhesion between carbon fibers (CFs) and matrix is mainly controlled by inherent surface structures and mutual wettability. However, CFs, with superior properties, have the low of surface wettability and activity. Changing the fiber surface can enhance the quality of interface, which expands the engineering application of CFs composites. Noticeably, the most traditional procedures involve the deterioration of fiber structure by multistep manipulation to introduce active sites, toxic reagents, high energy consumption, as well as the poor interfacial interaction between the fibers and the modified materials by the coating or deposition. Herein, an environmentally friendly and mild strategy was facilely designed via firmly coating tannic acid (TA, a renewable plant‐based polyphenol, the versatile adhesive) and then covalently grafted branched polyethyleneimine (PEI) onto the fiber surface. The novel grafting significantly increased fiber surface polarity, roughness and interfacial wettability without destroying surface microstructure, resulted in the sharp improvements in interlaminar shear strength (ILSS, 51.34 MPa) and interfacial shear strength (IFSS, 66.21 MPa). Impact strength and hydrothermal aging resistance of the resulting composites were also greatly increased. The hierarchical reinforcement arising from a promising and green strategy is facile to be prepared advanced polymer composites in multifunctional applications with the demand of highly interfacial properties and the usages of energy conservation.

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Synthesis of microporous aromatic framework with scholl-coupling reaction for efficient uranium (VI) capture

Cited by 10 publications

References 49 publications

Synthesis of Amidoxime‐modified Hollow Organic Porous Nanospheres for Efficient Uranium Adsorption from Aqueous Solution

Synthesis of Amidoxime‐modified Hollow Organic Porous Nanospheres for Efficient Uranium Adsorption from Aqueous Solution

Efficient Adsorption and Desorption of Uranium(VI) Using a Polymeric Adsorbent: A Combined Theoretical and Experimental Approach with Real-Life Alkaline Leach Liquor

Grafting of the hierarchical natural tannic acid and polyethyleneimine onto carbon fiber for significantly improved surface/interface properties

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