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

Zhu, Lien; Zhang, Chunhong; Ma, Fuqiu; Bi, Changlong; Zhu, Ruiqi; Qin, Feifan; Liu, Lijia; Bai, Jianwei; Dong, Hongbiao; Satoh, Toshifumi

doi:10.1039/d1en01046h

Cited by 14 publications

(2 citation statements)

References 59 publications

(68 reference statements)

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“…The hierarchical self-assembled polyimide microspheres (HSPIMs) are semicrystalline polymer materials formed by the close arrangement of molecular chains, most of which own a big particle size and self-supporting nanosheet structure, , exhibiting good chemical stability, radiation stability, and temperature stability, which inspired us to use them as a matrix material of a radioactive element adsorbent. The big particle sizes and self-supporting hierarchical structure can facilitate the passage of uranium-containing wastewater, which can overcome the shortcomings of powdered adsorbents and make the HSPIMs suitable for fixed-bed column adsorption.…”

Section: Introductionmentioning

confidence: 99%

Hierarchical Self-Assembled Polyimide Microspheres Functionalized with Amidoxime Groups for Uranium-Containing Wastewater Remediation

Zhu

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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Through molecule self-assembly and subsequent surface functionalization, novel uranium adsorbent AO−OB hierarchical self-assembled polyimide microspheres (AO-OBHSPIMs) were obtained by introducing the amidoxime groups into hierarchical self-assembled polyimide microspheres for the efficient and selective recovery of uranium from wastewater. The results of Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), X-ray diffraction (XRD), and nitrogen adsorption−desorption isotherm showed that AO-OBHSPIMs were a semicrystalline polymer material with self-supporting hierarchical structure and low pore volume, and they were equipped with abundant amidoxime groups. Given the recognized selectivity of amidoxime groups and their hierarchical structure, AO-OBHSPIMs exhibited excellent selectivity to uranyl ions. Moreover, AO-OBHSPIMs exhibited good stability and recyclability and remarkable removal percentage within lowconcentration solution (99.4%) and simulated uranium-containing wastewater (97.3%). AO-OBHSPIMs could be applied to fixedbed column adsorption due to their large particle size and self-supporting hierarchical structure that can facilitate water flow. The indepth discussion of the adsorption mechanism showed that the adsorption mainly depended on the combined action of electrostatic interactions and complexation, and the adsorption process was a spontaneous endothermic monolayer adsorption. In summary, AO-OBHSPIMs exhibited good application prospects in uranium-containing wastewater remediation.

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Section: Introductionmentioning

confidence: 99%

Hierarchical Self-Assembled Polyimide Microspheres Functionalized with Amidoxime Groups for Uranium-Containing Wastewater Remediation

Zhu

Zhang

et al. 2023

ACS Appl. Mater. Interfaces

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“…Similarly, self-assembly and electrospray methods suffer from similar drawbacks, as mentioned above. [28][29][30][31] Therefore, there is an urgent need for a simple and efficient method to scale up the production of PIHMs with uniform size.…”

Section: Introductionmentioning

confidence: 99%

Scalable Fabrication of Lightweight, Heat‐Resistant, and Controllable Sizes Polyimide Hollow Microspheres

Meng,

Ni,

Zhou

et al. 2023

Macro Chemistry & Physics

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Polyimide hollow microspheres (PIHMs) possess lightweight and excellent thermal resistance, making them highly valuable for various applications in aerospace, catalysis and irradiation. Co‐polymerized PIHMs (PIHMBMDs) were fabricated through powder foaming combined with a gradient heating strategy in this work. The diameter of PIHMBMDs ranged from 364 to 1230 µm, which could be designed by regulating the size of polyester ammonium salts (PEASs). The PIHMBMDs possessed intact morphology with a breakage rate of 3∼10% and low bulk density with a density ranging from 28.3 to 62.9 kg m−3. Furthermore, PIHMBMDs exhibited excellent thermal properties with a 5% weight loss temperature and glass transition temperature of 525.0 and 282.5 °C respectively, making it an ideal material for fabricating lightweight and high‐temperature‐resistant multifunctional composites. Moreover, the proposed method is simple, efficient and easily scalable, which is suitable for industrial applications to manufacture large quantities of PIHMs.This article is protected by copyright. All rights reserved

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Highly efficient and antibacterial uranium adsorbents derived from disubstituted amidoxime functionalized chitosan

Zhu

Zhang

et al. 2022

Cellulose

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

Abstract: A new oxime-modified hierarchical self-assembled polyimide adsorbent with high adsorption capacity, excellent selectivity and recyclability, and the applicability of fixed-bed column adsorption was developed to recycle uranium from wastewater.

Cited by 14 publications

References 59 publications

Hierarchical Self-Assembled Polyimide Microspheres Functionalized with Amidoxime Groups for Uranium-Containing Wastewater Remediation

Hierarchical Self-Assembled Polyimide Microspheres Functionalized with Amidoxime Groups for Uranium-Containing Wastewater Remediation

Scalable Fabrication of Lightweight, Heat‐Resistant, and Controllable Sizes Polyimide Hollow Microspheres

Highly efficient and antibacterial uranium adsorbents derived from disubstituted amidoxime functionalized chitosan

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