Hyperbranched topological swollen-layer constructs of multi-active sites polyacrylonitrile (PAN) adsorbent for uranium(VI) extraction from seawater

Ju, Peihai; Liu, Qi; Zhang, Hongsen; Chen, Rongrong; Liu, Jingyuan; Yu, Jing; Liu, Peili; Zhang, Milin; Wang, Jun

doi:10.1016/j.cej.2019.05.222

Cited by 61 publications

(29 citation statements)

References 56 publications

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“…[3] Ther ecovery of uranium from seawater has received constant attention during the past 60 years. [4] Among all currently available strategies for uranium recovery from seawater,t he adsorption of uranium by chemical adsorbents seems to have the most potential. [5] Thus,n umerous adsorbents,i ncluding polymeric fibers, [6] biogenic substance, [7] polymeric hydrogel, [8] and porous materials that include metal-organic frameworks, [9] covalent organic frameworks, [10] porous aromatic frameworks, [11] porous aromatic frameworks, [12] and porous organic polymers, [13] have been developed, and these adsorbents show promising performance in uranium adsorption.…”

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confidence: 99%

Photoinduced Multiple Effects to Enhance Uranium Extraction from Natural Seawater by Black Phosphorus Nanosheets

et al. 2019

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Based on the photoinduced photothermal, photoelectric, and photocatalytic effects of black phosphorus (BP) nanosheets, a BP‐PAO fiber with enhanced uranium extraction capacity and high antibiofouling activity is fabricated by compositing BP nanosheets into polyacrylamidoxime (PAO). The photothermal effect increases the coordination interaction between UO22+ and the functional amidoxime group, and the photoelectric effect produces the surface positive electric field that exhibits electrostatic attraction to the negative [UO2(CO3)3]4−, which all increase the capacity for uranium adsorption. The photocatalytic effect endows the adsorbent with high antibiofouling activity by producing biotoxic reactive oxygen species. Owing to these three photoinduced effects, the photoinduced BP‐PAO fiber shows a high uranium adsorption capacity of 11.76 mg g−1, which is 1.50 times of the PAO fiber, in bacteria‐containing natural seawater.

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confidence: 99%

Photoinduced Multiple Effects to Enhance Uranium Extraction from Natural Seawater by Black Phosphorus Nanosheets

et al. 2019

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“…6 c, d. The N1 s spectrum of the material forms three peaks at approximately 399 eV, belonging to –NH 2 /–NH–, –C–N–, and C≡N. Figure 6 a, c, d shows that the intensities of N1 s decreased, and the peaks of N1 s shifted to higher energy values [ 13 , 33 ].The results confirmed the participation of N-containing groups in the coating process. The UV–vis DRS spectrum of PAN fibers has a broad UV absorption peak at 409 nm (Additional file 1 : Fig.…”

Section: Resultsmentioning

confidence: 96%

“…Scheme 2 depicts the principle of dispersed Ag NPs on PAN fiber. Amino HBP was characterized by a three-dimensional structure and contained a large number of amino groups and terminal primary amino groups, which are suitable for complex metal ion in water [ 13 , 34 ]. Under a high-temperature condition, amino groups can reduce Ag + to form a sliver colloid without any additional reductants.…”

Section: Resultsmentioning

confidence: 99%

“…Wang et al [ 12 ] investigated the modification of PAN fiber by hyperbranched polyethylenimine (HPEI) through water-mediated hydrolysis and amidation reaction in an autoclave.The obtained fibers could be successfully used as supporters and stabilizers in the preparation of small-sized Au nanoparticles (NPs). Ju et al [ 13 ] investigated the polyamidoamine grown on the surface of the PAN fiber and found that the treated fiber can be extracted from seawater through adsorption of uranium. In these reports, HPEI are very expensive polymers, controlling the graft of the PAN fibers are always difficult and needs many steps.…”

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confidence: 99%

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In Situ Synthesis of Silver Nanoparticles on Amino-Grafted Polyacrylonitrile Fiber and Its Antibacterial Activity

et al. 2021

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In this study, amino hyperbranched polymers (HBP)-grafted polyacrylonitrile (PAN) fiber was prepared through an amidation reaction in an autoclave. The prepared PAN-G-HBP fiber can complex Ag+ through amino groups of amino HBP, and in a hot steaming condition, Ag+ can be converted to Ag0 through the reducibility of HBP. PAN-G-HBP and Ag nanoparticles (NPs)-coated fibers were then characterized through FTIR, UV–VIS DRS, FE-SEM, EDS, XPS and antibacterial measurement. FTIR results confirmed HBP was grafted on the surface of PAN fiber. FE-SEM showed that after grafting with HBP, the average diameter of PAN fibers was amplified. EDS, XPS, and UV–VIS DRS method indicated that under hot steaming condition and with the reducibility of HBP, Ag NPs uniform coating on the PAN-G-HBP. Ag NPs-coated fibers exhibits excellent antibacterial property against Escherichia coli and Staphylococcus aureus. Even under 20 times home washing conditions, the antibacterial reduction of Ag NPs-coated PAN fiber can achieved more than 98.94%.

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“…In terms of the industrial application of the adsorbent, the adsorption rate of an adsorbent is important [ 51 ]. The effect of CA was confirmed by evaluating the initial Li + adsorption rate ( h ) of both adsorbents, following Equation (4).…”

Section: Resultsmentioning

confidence: 99%

HTO/Cellulose Aerogel for Rapid and Highly Selective Li+ Recovery from Seawater

Qian

Huang

et al. 2021

Molecules

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To achieve rapid and highly efficient recovery of Li+ from seawater, a series of H2TiO3/cellulose aerogels (HTO/CA) with a porous network were prepared by a simple and effective method. The as-prepared HTO/CA were characterized and their Li+ adsorption performance was evaluated. The obtained results revealed that the maximum capacity of HTO/CA to adsorb Li+ was 28.58 ± 0.71 mg g−1. The dynamic k2 value indicated that the Li+ adsorption rate of HTO/CA was nearly five times that of HTO powder. Furthermore, the aerogel retained extremely high Li+ selectivity compared with Mg2+, Ca2+, K+, and Na+. After regeneration for five cycles, the HTO/CA retained a Li+ adsorption capacity of 22.95 mg g−1. Moreover, the HTO/CA showed an excellent adsorption efficiency of 69.93% ± 0.04% and high selectivity to Li+ in actual seawater. These findings confirm its potential as an adsorbent for recovering Li+ from seawater.

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Hyperbranched topological swollen-layer constructs of multi-active sites polyacrylonitrile (PAN) adsorbent for uranium(VI) extraction from seawater

Cited by 61 publications

References 56 publications

Photoinduced Multiple Effects to Enhance Uranium Extraction from Natural Seawater by Black Phosphorus Nanosheets

Photoinduced Multiple Effects to Enhance Uranium Extraction from Natural Seawater by Black Phosphorus Nanosheets

In Situ Synthesis of Silver Nanoparticles on Amino-Grafted Polyacrylonitrile Fiber and Its Antibacterial Activity

HTO/Cellulose Aerogel for Rapid and Highly Selective Li+ Recovery from Seawater

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