A simple and universal strategy to construct robust and anti-biofouling amidoxime aerogels for enhanced uranium extraction from seawater

Shi, Se; Li, Bochen; Qian, Yongxian; Mei, Pingping; Wang, Ning

doi:10.1016/j.cej.2020.125337

Cited by 96 publications

(33 citation statements)

References 46 publications

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“…As observed from Figure A, the XPS spectrum of uranium‐laden VA‐PG (U@VA‐PG) membrane appeared new strong U 4f double peaks. The corresponding high‐resolution U 4f XPS spectra exhibited U 4f 5/2 and U 4f 7/2 peaks centered at 392.65 and 381.60 eV, respectively (Figure S8, Supporting Information), revealing the successful uranium capture, [ 47 ] which can be further supported by elemental mapping data (Figure S9, Supporting Information). Uranium sorption experiments were performed in 8 ppm U‐spiked simulated seawater (pH ≈ 8).…”

Section: Resultsmentioning

confidence: 73%

Vertically Aligned Polyamidoxime/Graphene Oxide Hybrid Sheets’ Membrane for Ultrafast and Selective Extraction of Uranium from Seawater

Liu

Zhang

Chen

et al. 2021

Adv Funct Materials

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With the continuous research and development of amidoxime (AO)‐based adsorbents, industrialization production of uranium from seawater gradually becomes a reality. However, the currently available AO‐based adsorbents still suffer from low adsorption rate and poor selectivity. Herein, vertically aligned polyamioxime–graphene oxide (VA‐PG) sheet membrane is fabricated by directional freeze casting. The run‐through microchannels contribute to the free diffusion of uranyl ions (UO22+), leading to the fast adsorption kinetics. Furthermore, partially reduced graphene oxide allows high photothermal conversion efficiency and rapid in‐plane heat transfer, resulting in the fast temperature rise under simulated sunlight irradiation. Because of the endothermic behavior of UO22+, light‐irradiated VA‐PG can simultaneously satisfy the requirements of high adsorption capacity (13.63 mg‐U g‐Ads−1), high adsorption rate (0.43 mg g−1 day−1), and excellent selectivity toward U(VI) over V(V) (U/V = 1.24) in natural seawater, indicating the right direction for a breakthrough in the field of uranium extraction from seawater.

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Section: Resultsmentioning

confidence: 73%

Vertically Aligned Polyamidoxime/Graphene Oxide Hybrid Sheets’ Membrane for Ultrafast and Selective Extraction of Uranium from Seawater

Liu

Zhang

Chen

et al. 2021

Adv Funct Materials

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“…Anhydrous HAH gel is impossible to observe micro‐submicron pores, and the calculated Brunauer–Emmett–Teller (BET) surface area is 0.006–0.864 m 2 g −1 , which is farther lower than the typical porous gels reported in literature (≥50 m 2 g −1 ). [ 24 ] It can be seen from Figure S9 , Supporting Information that the weight loss rate of the typical HAH@CTAB material is as high as 31 mg per g‐HAH for 1 h, accompanied by a large surface area shrinkage of 44%. As a result, hydrogen bond as a typical weak interaction force cannot lock water molecules during the low relative humidity of 65%, causing the super‐elastic properties of the HAH gel to fail.…”

Section: Resultsmentioning

confidence: 99%

A Smart Design Strategy for Super‐Elastic Hydrogel with Long‐Term Moisture, Extreme Temperature Resistance, and Non‐Flammability

et al. 2021

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Elastic hydrogel is a promising material category for designing biological muscles, repairable building materials, flexible electronic devices, and vulcanized rubber substitutes, which is required to have a long life, good self‐healing performance and extreme temperature tolerance. Herein, a super‐elastic mineral hydrogel is developed with long‐lasting moisture, based on dynamic physical crosslinking between hydrated calcium ion clusters and amide groups of polyacrylamide (PAM). The complex hydrogel exhibits a super stretchability of 13 600% at room temperature, and can maintain the super flexibility in a wide temperature range of −40–50 °C or for a long period of 28 days. Particularly, the soft material cannot be ignited under an open flame at 400–500 °C, because of coupling dual flame retardant mechanisms containing the endothermic effect of liquid water evaporation and the barrier effect of calcium mineral salt on oxygen. In conclusion, the novel complex hydrogel with excellent tensile property, stability in extreme temperature or long operating time, and flame retardancy may become a promising candidate in the fields of agriculture, food, construction, medicine, and machinery.

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“…The data fitted in with the PSO model manifested the adsorption was chemisorption. 48 3.2.3 Effect of initial uranium concentration. In order to explore the maximum adsorption capacity of HSPI-O, the effect of initial uranium concentration on the adsorption capacity and removal percentages of uranium was studied (m = 10 mg, V = 50 mL, t = 16 h, pH = 6, 298 K).…”

Section: Effect Of Contact Timementioning

confidence: 99%

Oxime-modified hierarchical self-assembly polyimide microspheres for high-efficient uranium recovery from wastewater

Zhu

Zhang

et al. 2022

Environ. Sci.: Nano

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A simple and universal strategy to construct robust and anti-biofouling amidoxime aerogels for enhanced uranium extraction from seawater

Cited by 96 publications

References 46 publications

Vertically Aligned Polyamidoxime/Graphene Oxide Hybrid Sheets’ Membrane for Ultrafast and Selective Extraction of Uranium from Seawater

Vertically Aligned Polyamidoxime/Graphene Oxide Hybrid Sheets’ Membrane for Ultrafast and Selective Extraction of Uranium from Seawater

A Smart Design Strategy for Super‐Elastic Hydrogel with Long‐Term Moisture, Extreme Temperature Resistance, and Non‐Flammability

Oxime-modified hierarchical self-assembly polyimide microspheres for high-efficient uranium recovery from wastewater

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