Highly efficient and selective capture of TcO4− or ReO4− by imidazolium-based ionic liquid polymers

Huang, Mengnan; Kan, Lixin; Zhao, Wenyan; Wang, Yuejiao; Xiong, Ying; Shan, Wei; Lou, Zhenning

doi:10.1016/j.cej.2020.127763

Cited by 61 publications

(23 citation statements)

References 68 publications

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“…In this study, to improve the grafting density and the utilization of the cationic functional groups in electrospun fibers, pore-forming inside the fibers and hyperbranched graft modification were combined to fabricate porous cationic electrospun fibers (PCE fibers) for 99 adsorption. [16,[30][31][32] Considering the operational availability of the grafting reaction, quaternary ammonium group was chosen as the functional group in this work. As expected, the obtained PCE fibers could efficiently capture 99 TcO 4 − / ReO 4 − with fast kinetics, high capacity, excellent selectivity, and good stability.…”

Section: Introductionmentioning

confidence: 99%

“…Cationic N‐contained groups were usually applied as the functional groups for 99 TcO 4 − /ReO 4 − adsorption. [ 16,30–32 ] Considering the operational availability of the grafting reaction, quaternary ammonium group was chosen as the functional group in this work. As expected, the obtained PCE fibers could efficiently capture 99 TcO 4 − /ReO 4 − with fast kinetics, high capacity, excellent selectivity, and good stability.…”

Section: Introductionmentioning

confidence: 99%

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Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake

Zhao

Chen

Gao

et al. 2022

Adv Funct Materials

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Removal of radioactive technetium-99 ( 99 TcO 4 − ) from water by effective adsorbents is highly desired but remains a challenge. The currently used resin adsorbents possess several obstacles, such as slow adsorption kinetics and low adsorption capacity. To address these issues, herein a type of fibrous adsorbent with porosity and hyper-branched quaternary ammonium groups, namely porous cationic electrospun fibers (PCE fibers), is successfully prepared. PCE fibers can remove 97% of 99 TcO 4 − within 1 min and the equilibrium time of 99% removal is 20 min. The predicted maximum adsorption capacity toward the surrogate ReO 4 − can reach 826 mg g −1 , which is higher than the state of art anion-exchange resins and most of the other reported adsorbents. Furthermore, PCE fibers have good selectivity for ReO 4 − in the presence of competitive anions, and can retain ReO 4 − uptake under extreme conditions including high acid-base and gamma irradiation. Importantly, PCE fibrous adsorptive membrane is employed for dynamic ReO 4 − removal from simulated Hanford LAW stream with a processing capacity of 600 kg simulated stream per kilogram PCE fibers. The excellent performance highlights the advantages of PCE fibers over traditional resins in technetium removal.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake

Zhao

Chen

Gao

et al. 2022

Adv Funct Materials

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“…A large amount of material has been attempted to recover Au(III) by ion exchange and adsorption, such as metal–organic frameworks (MOFs), nanomaterials − (nanosilica, nanospheres, nanotubes, and nanowire), biopolymers, ionic polymers [poly(ionic liquids)], , and so forth. Among them, ionic polymers have gotten a lot of attention due to their unique physical and chemical properties. − …”

Section: Introductionmentioning

confidence: 99%

Effects of the Cationic Structure on the Adsorption Performance of Ionic Polymers toward Au(III): an Experimental and DFT Study

Kou

Pan

et al. 2022

Langmuir

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Ionic polymers have been proven to be promising adsorbents in recovering Au(III) due to their advantages of simple synthesis and high adsorption efficiency. However, the unclarity of the relationship between the adsorption ability of ionic polymers and their cationic structures hinders further optimization of their adsorption performance. This study synthesized a series of ionic polymers with pyridinium, imidazolium, piperidinium, pyrrolidinium, and triethylammonium cations to discover the effects of the cationic structure on their adsorption properties. Experimental results show that the existence of anion−π interaction between aromatic cations and [AuCl 4 ] − makes the aromatic cations−anion interaction stronger, which does not enhance the adsorption performance of the aromatic-based ionic polymer. This is due to the charge delocalization in the aromatic ring, resulting in a lower electrostatic potential (ESP) of aromatic cations than that of aliphatic cations with a localized charge. The higher the ESP of cations, the better the adsorption performance of the corresponding ionic polymer. This study serves as a deep understanding of the cationic structure−adsorptive performance relationship of the ionic polymer at the molecular level and further provides a theoretical guidance to optimize the adsorption performance of ionic polymers.

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“…This phenomenon follows the principle of anti-Hofmeister bias that can also be attributed to the hydrophobic nature of the Q + skeleton (Figure S8). 32,33 The optimized structure of Q + combined with ReO 4…”

Section: ■ Results and Discussionmentioning

confidence: 99%

3D Ionic Olefin-Linked Conjugated Microporous Polymers for Selective Detection and Removal of TcO₄^–/ReO₄^– from Wastewater

Zhang

Chen

et al. 2022

Anal. Chem.

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Technetium (99Tc) is a highly toxic radioactive nuclear wastewater contaminant. Real-time detection of 99Tc is very difficult due to its difficult-to-complex nature. Herein, a novel three-dimensional ionic olefin-linked conjugated microporous polymer (TFPM-EP-Br) is constructed using tetrakis(4-aldehyde phenyl)methane (TFPM) as the central monomer. The unique cationic cavity and highly hydrophobic framework enable TFPM-EP-Br to act as a fluorescent sensor for TcO4 –. The fluorophores of TFPM-EP-Br can be quenched due to electron transfer from TFPM-EP-Br to TcO4 – and the formation of strongly nonfluorescent complexes. Meanwhile, the regular pore channels are beneficial for the fast mass transfer of TcO4 –, resulting in an ultrafast response time (less than 2 s) with an ultralow detection limit (33.3 nM). In addition, the ultrahigh specific surface area enables TFPM-EP-Br to combine the ability to synergistically detect and remove radioactive 99Tc. From this perspective, the novel conjugated microporous polymer has made a breakthrough in the detection and extraction of radioactive contaminants.

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Highly efficient and selective capture of TcO4− or ReO4− by imidazolium-based ionic liquid polymers

Cited by 61 publications

References 68 publications

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake

Effects of the Cationic Structure on the Adsorption Performance of Ionic Polymers toward Au(III): an Experimental and DFT Study

3D Ionic Olefin-Linked Conjugated Microporous Polymers for Selective Detection and Removal of TcO₄^–/ReO₄^– from Wastewater

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Highly efficient and selective capture of TcO4− or ReO4− by imidazolium-based ionic liquid polymers

Cited by 61 publications

References 68 publications

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous 99TcO4− Uptake

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous 99TcO4− Uptake

Effects of the Cationic Structure on the Adsorption Performance of Ionic Polymers toward Au(III): an Experimental and DFT Study

3D Ionic Olefin-Linked Conjugated Microporous Polymers for Selective Detection and Removal of TcO4–/ReO4– from Wastewater

Contact Info

Product

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Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake

Porous Cationic Electrospun Fibers with Sufficient Adsorption Sites for Effective and Continuous ⁹⁹TcO₄⁻ Uptake

3D Ionic Olefin-Linked Conjugated Microporous Polymers for Selective Detection and Removal of TcO₄^–/ReO₄^– from Wastewater