A novel U(<scp>vi</scp>)-imprinted graphitic carbon nitride composite for the selective and efficient removal of U(<scp>vi</scp>) from simulated seawater

Hao, Xuan; Chen, Rongrong; Liu, Qi; Liu, Jingyuan; Zhang, Hongsen; Yu, Jing; Li, Zhanshuang; Wang, Jun

doi:10.1039/c8qi00522b

Cited by 40 publications

(14 citation statements)

References 65 publications

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“…As illustrated in Figures b and b, the high-resolution spectra of U 4f can be distinguished into two peaks of U 4f 7/2 (at ∼382 eV) and U 4f 5/2 (at ∼392 eV). , Additionally, the satellite peak (at 384.15 eV) of U 4f 7/2 appeared with low intensity, which indicated that the chemical interaction with the surface produced the surface complex with oxygen-containing functional groups. ,, The high-resolution spectra of Eu 3d (Figures d and f) were located at ∼1135 and ∼1165 eV, which were assigned to Eu 3d 5/2 and Eu 3d 3/2 , respectively. , However, the relative intensity of the N 1s spectra decreased and the peak location shifted to the lower binding energy after adsorption, which was attributed to the chelating reaction of UO 2 2+ /Eu 3+ ions on the nitrogen-containing functional groups . Specifically, the N 1s peak of NH 2 -MIL-125(Ti) disappeared after UO 2 2+ adsorption.…”

Section: Resultsmentioning

confidence: 92%

Construction of Core–Shell MOFs@COF Hybrids as a Platform for the Removal of UO₂²⁺ and Eu³⁺ Ions from Solution

Zhong

Liu

Liang

et al. 2021

ACS Appl. Mater. Interfaces

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The binary nanocomposites of metal/covalent–organic frameworks (NH2-MIL-125(Ti)@TpPa-1) were constructed by solvothermal method, which was developed as a multifunctional platform with adsorption and photocatalysis for radionuclides removal. The batch experiments and physicochemical property (FT-IR, XRD, SEM, TEM, XPS, etc.) corroborated: (i) core–shell NH2-MIL-125(Ti)@TpPa-1 had a more stable, multilayer pore structure and abundant active functional groups; (ii) NH2-MIL-125(Ti)@TpPa-1 had fast a removal rate, as well as a high adsorption capacity of 536.73 mg (UO2 2+)/g and 593.97 mg (Eu3+)/g; (iii) the pseudo-second-order and Langmuir model provided a more reasonable description, indicating the immobilization process was endothermic, spontaneous chemisorption; (iv) the adsorption mechanism was chelation and electrostatic attraction, ascribed to the nitrogen/oxygen-containing functional groups. These results illustrated that NH2-MIL-125(Ti)@TpPa-1 was a prospective adsorbent for the remediation polluted by radionuclides. In addition, the research provided the theoretical basis for further investigation on the UO2 2+(VI) photoreduction.

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Section: Resultsmentioning

confidence: 92%

Construction of Core–Shell MOFs@COF Hybrids as a Platform for the Removal of UO₂²⁺ and Eu³⁺ Ions from Solution

Zhong

Liu

Liang

et al. 2021

ACS Appl. Mater. Interfaces

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“…Hao et al. [ 83 ] designed an ion‐imprinted graphite carbon nitride/β‐CD (g‐C 3 N 4 /β‐CD) composite adsorbent for the selective extraction of U (VI) ions from seawater. Compared with non‐imprinted materials, ion‐imprinted polymers have excellent adsorption capacity (859.666 mg g −1 ) at ppm levels and good selectivity for U (VI) extraction.…”

Section: Other Molecularly Imprinted Polymers Based On Cyclodextrinmentioning

confidence: 99%

Recent Advances of Molecularly Imprinted Polymers Based on Cyclodextrin

Zhao

Wang

Zhang

et al. 2021

Macromol. Rapid Commun.

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Molecular imprinting polymers (MIPs), generally considered as artificial mimics that are comparable to natural receptor, are polymers with tailor‐made specific recognition sites complementary to the template molecules in shape and size. As a class of supramolecular compounds, cyclodextrins (CDs) are flourishing in the field of molecular imprinting with their unique structural properties. This review presents recent advances in application of MIPs based on CDs during the past five years. The discussion is grouped according to the different role of CDs in MIPs, that is, functional monomer, carrier modifier, etc. Main focus is the application of CD‐based MIP on sample preparation, detection, and sensing. Additionally, drug delivery with CD‐based MIP is also briefly discussed. Finally, challenges and future prospects of application of CDs in MIP are elaborated.

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“…Song et al described the application of a hollow fiber-based on carbon nanotubes modified with β-CD for the efficient and environmentally friendly SPME of plant hormones to overcome the lack of selectivity of hollow fibers [ 140 ]. Moreover, a novel U(VI)-imprinted graphitic carbon nitride composite for the selective and efficient removal of U(VI) from seawater was reported to break with the side effects of the future long-term development of nuclear energy in the world [ 141 ]. The adsorption capacity was calculated to be 860 mg g −1 at 25 °C, and the selectivity factors were high enough to affirm the high selectivity of the material for the purpose.…”

Section: Deeping In: the Environmental Benefits Of Using Cyclodextmentioning

confidence: 99%

Cyclodextrins as a Key Piece in Nanostructured Materials: Quantitation and Remediation of Pollutants

et al. 2020

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Separation and pre-concentration of trace pollutants from their matrix by reversible formation of inclusion complexes has turned into a widely studied field, especially for the benefits provided to different areas. Cyclodextrins are non-toxic oligosaccharides that are well known for their host–guest chemistry, low prices, and negligible environmental impact. Therefore, they have been widely used as chiral selectors and delivery systems in the pharmaceutical and food industry over time. However, their use for extraction purposes is hampered by their high solubility in water. This difficulty is being overcome with a variety of investigations in materials science. The setting-up of novel solid sorbents with improved properties thanks to the presence of cyclodextrins at their structure is still an open research area. Some properties they can offer, such as an increased selectivity or a good distribution along the surface of a solid support, which provides better accessibility for guest molecules, are characteristics of great interest. This systematic review reports the most significant uses of cyclodextrins for the adsorption of pollutants in different-origin samples based on the works reported in the literature in the last years. The study has been carried out indistinctly for quantitation and remediation purposes.

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A novel U(vi)-imprinted graphitic carbon nitride composite for the selective and efficient removal of U(vi) from simulated seawater

Abstract: A high selectivity U(vi)-imprinted g-C3N4/β-CD sorbent was synthesized and used for selective removal of U(vi). The interaction mechanism is mainly surface complexation and electrostatic attraction.

Cited by 40 publications

References 65 publications

Construction of Core–Shell MOFs@COF Hybrids as a Platform for the Removal of UO₂²⁺ and Eu³⁺ Ions from Solution

Construction of Core–Shell MOFs@COF Hybrids as a Platform for the Removal of UO₂²⁺ and Eu³⁺ Ions from Solution

Recent Advances of Molecularly Imprinted Polymers Based on Cyclodextrin

Cyclodextrins as a Key Piece in Nanostructured Materials: Quantitation and Remediation of Pollutants

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A novel U(vi)-imprinted graphitic carbon nitride composite for the selective and efficient removal of U(vi) from simulated seawater

Abstract: A high selectivity U(vi)-imprinted g-C3N4/β-CD sorbent was synthesized and used for selective removal of U(vi). The interaction mechanism is mainly surface complexation and electrostatic attraction.

Cited by 40 publications

References 65 publications

Construction of Core–Shell MOFs@COF Hybrids as a Platform for the Removal of UO22+ and Eu3+ Ions from Solution

Construction of Core–Shell MOFs@COF Hybrids as a Platform for the Removal of UO22+ and Eu3+ Ions from Solution

Recent Advances of Molecularly Imprinted Polymers Based on Cyclodextrin

Cyclodextrins as a Key Piece in Nanostructured Materials: Quantitation and Remediation of Pollutants

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Construction of Core–Shell MOFs@COF Hybrids as a Platform for the Removal of UO₂²⁺ and Eu³⁺ Ions from Solution

Construction of Core–Shell MOFs@COF Hybrids as a Platform for the Removal of UO₂²⁺ and Eu³⁺ Ions from Solution