The fabrication of 3D hierarchical flower-like δ-MnO2@COF nanocomposites for the efficient and ultra-fast removal of UO22+ ions from aqueous solution

Zhong, Xin; Lü, Zhipeng; Liang, Wen; Guo, Xinwen; Hu, Baowei

doi:10.1039/d0en00793e

Cited by 96 publications

(27 citation statements)

References 57 publications

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“…(3) The structure of a material determines its property. [144] Regulating the structure of GO-based nanomaterials through optimizing synthesis techniques and experimental conditions to improve their uranium adsorption performance require further studies. Moreover, the correlative relationship between molecular structure and adsorption performance should be clarified for further design of favorable GO-based nanomaterials for uranium recovery and removal.…”

Section: Discussionmentioning

confidence: 99%

Graphene Oxide-based Nanomaterials for Uranium Adsorptive Uptake

Liu¹,

Mao²

2021

ES Mater. Manuf.

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The growth of nuclear power generation and the necessity to acquire uranium reserves for energy security and pollution regulation for environmental protection put much emphasis on the removal and recovery of uranium from aqueous solutions. Adsorption has been proved to be a promising method for this purpose method because of its high adsorption efficiency, easy operation, low cost, reusability and availability of massive adsorbents. Among a wide variety of adsorbents, graphene oxide (GO) has demonstrated excellent adsorption potential for uranium uptake and recovery due to its unique 2D structure, high specific surface area and abundant oxygen-containing functional groups. Regarding the functional groups, it can make GO with high dispersion and hydrophilicity and participate in the complexation of uranium, leading to high adsorption efficiency for uranium. In this review, the research status and progress of GO-based nanomaterials for uranium adsorption are summarized. Their adsorption capacities, influencing factors, kinetics, isotherms and thermodynamics are compared and discussed. The microscopic mechanisms of uranium adsorption onto these GO-based nanomaterials are elaborated at molecular level by spectral analysis, surface complexation models, and theoretical calculations. Meanwhile, the challenges and research trends in the study of uranium adsorption by GO-based nanomaterials are pointed out. We believe that our focused review provides not only a summarizing reference on the current status of uranium removal and recovery by GObased nanomaterials, but also future directions for related follow-up research and practical applications.

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Section: Discussionmentioning

confidence: 99%

Graphene Oxide-based Nanomaterials for Uranium Adsorptive Uptake

Liu¹,

Mao²

2021

ES Mater. Manuf.

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“…JLT12 coating was able to remove the passive lepidocrocite and goethite layers of the magnetite to efficiently facilitate the Cr(VI) reduction process [134]. Also, Zhong et al [80] through kinetics and spectroscopic studies attributed the formation of U-O and Mn-O-U bonds to the oxygencontaining groups in δ-MnO 2 @COF nanocomposite, which resulted in ultra-fast removal of UO 2þ 2 radionuclide from water. These extra abilities of inorganic nanoadsorbents demonstrate that efficient adsorbents can be designed and hold promise for efficient environmental remediation processes.…”

Section: The Ability Of Adsorbent To Perform Other Functionsmentioning

confidence: 99%

“…Examples of useful nanoadsorbents are zerovalent iron (n-ZVI), iron oxide (Fe 3 O 4 ), Fe 3 O 4 @SiO 2 -SH, iron sulfide (FeS), amorphous silica (SiO 2 ) and aluminium-silicate-mixed oxides nanomaterials. Interestingly, blends of inorganic nanomaterials with large surface area metal-organic frameworks (MOFs) and covalent organic frameworks (COFs) have shown high adsorption capacity for heavy metals and radionuclides [80,81].…”

Section: Introductionmentioning

confidence: 99%

Heavy metal pollution and the role of inorganic nanomaterials in environmental remediation

et al. 2021

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Contamination of water and soil with toxic heavy metals is a major threat to human health. Although extensive work has been performed on reporting heavy metal pollutions globally, there are limited review articles on addressing this pernicious phenomenon. This paper reviews inorganic nanoparticles and provides a framework for their qualities required as good nanoadsorbents for efficient removal of heavy metals from water. Different inorganic nanoparticles including metals, metal oxides and metal sulfides nanoparticles have been applied as nanoadsorbents to successfully treat water with high contaminations of heavy metals at concentrations greater than 100 mg l −1 , achieving high adsorption capacities up to 3449 mg g −1 . It has been identified that the synthesis method, selectivity, stability, regeneration and reusability, and adsorbent separation from solution are critical parameters in deciding on the quality of inorganic nanoadsorbents. Surface functionalized nanoadsorbents were found to possess high selectivity and capacity for heavy metals removal from water even at a very low adsorbent dosage of less than 2 g l −1 , which makes them better than conventional adsorbents in environmental remediation.

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“…[ 28 ] Adsorption methods are widely used to remove pollutants from water. [ 29 ] Over the years, scientists have focused on a large array of materials for adsorption applications such as graphene, [ 30 ] MoS 2 , [ 31 ] transition metal carbides, [ 32 ] g‐C 3 N 4 , [ 33 ] covalent organic frameworks (COFs), [ 34 ] metal organic frameworks (MOFs), [ 35 ] zeolitic imidazolate frameworks, [ 36 ] clay minerals, [ 37 ] layered double hydroxides (LDHs), [ 38 ] aerogels, [ 39 ] metal oxides, [ 40 ] active carbons, [ 41 ] ordered mesoporous carbon, [ 42 ] polymers, [ 43 ] and graphene oxide (GO) [ 44 ] as adsorbents to separate HMIs and radionuclides. [ 45 ] However, these materials have some shortcomings: 1) COFs and MOFs are not stable in complex wastewater; 2) LDHs exhibit slow adsorption kinetics and limited selectivity; 3) the synthesis process of GO and C 3 N 4 are complicated and expensive.…”

Section: Introductionmentioning

confidence: 99%

Titanium Carbide‐Based Adsorbents for Removal of Heavy Metal Ions and Radionuclides: From Nanomaterials to 3D Architectures

Dong

Bhattacharjee

Zhang

et al. 2021

Adv Materials Inter

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Heavy metal ions (HMIs) and radionuclides pose serious threats to food safety, human health, and marine ecosystems. Titanium carbides are advantageous owing to their good hydrophilicity, controllable surface charge, specific active groups, and high radiation stability, which make them effective candidates for removing toxic HMIs and radionuclides from wastewater. Recently, a lot of research is conducted to discover new methods for preparing functional titanium carbide composite materials to enhance the adsorption performance and overcome the shortcomings of conventional nanomaterials. Since 2011, the titanium carbide‐based adsorbents have undergone a developmental process from a single 2D nanosheet to a wide range of composite materials and 3D architectures. In this review, the development and progress in the design and synthesis methods of various titanium carbide‐based adsorbents are summarized. These methods are practical, scalable, and controllable in terms of structure and surface chemistry. The application of these surface‐modified composite materials in the adsorption of HMIs and radionuclides is also discussed, and the adsorption mass transfer mechanism of the adsorbates on titanium carbide‐based adsorbents is analyzed. Finally, the challenges and prospects of titanium carbide composite materials for future applications in the domain of metal ion adsorption are discussed.

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The fabrication of 3D hierarchical flower-like δ-MnO₂@COF nanocomposites for the efficient and ultra-fast removal of UO₂²⁺ ions from aqueous solution

Abstract: 3D flower-like δ-MnO2@TpPa-1 composites was constructed though the integration of δ-MnO2 nano-flowers with a covalent organic framework (TpPa-1) via ultrasonication process. δ-MnO2@TpPa-1 a promising adsorbent for spent-nuclear-fuel reprocessing.

Cited by 96 publications

References 57 publications

Graphene Oxide-based Nanomaterials for Uranium Adsorptive Uptake

Graphene Oxide-based Nanomaterials for Uranium Adsorptive Uptake

Heavy metal pollution and the role of inorganic nanomaterials in environmental remediation

Titanium Carbide‐Based Adsorbents for Removal of Heavy Metal Ions and Radionuclides: From Nanomaterials to 3D Architectures

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