Advanced photocatalysts for uranium extraction: Elaborate design and future perspectives

Yu, Kaifu; Dong, Changxue; Yuan, Xin; Gong, Xiang; Lian, Jie; Cao, Xin; Li, Mingzhe; Zhou, Li; Hu, Baowei; He, Rong; Zhu, Wenkun; Wang, Xiangke

doi:10.1016/j.ccr.2022.214615

Cited by 219 publications

(62 citation statements)

References 147 publications

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“…Environmental pollution has become a critical issue in human health and environmental protection. 152 , 153 Benefiting from their tunable configuration, controllable composition, permanent porosity, and larger specific surface area, MOF-derived hollow structures have displayed fascinating physicochemical properties and amassed extensive attention in catalytic degradation of pollutants in our environment. Li and colleagues fabricated ZnO@C-N-Co core-shell nanostructures that used a hollow Zn/Co-ZIF matrix as precursor toward efficient degradation of MO and displayed excellently improved performance and remarkable recyclability.…”

Section: Applications Of Mof Nanocrystal-derived Hollow Porous Materialsmentioning

confidence: 99%

Metal-organic framework nanocrystal-derived hollow porous materials: Synthetic strategies and emerging applications

et al. 2022

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Section: Applications Of Mof Nanocrystal-derived Hollow Porous Materialsmentioning

confidence: 99%

Metal-organic framework nanocrystal-derived hollow porous materials: Synthetic strategies and emerging applications

et al. 2022

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“…The photocatalytic reduction of U(VI) is an efficient method to extract or immobilize U(VI) from aqueous solutions. Chen et al (2022b) summarized the recent works about the visible light-driven photocatalytic strategy for the selective U(VI) extraction, and concluded that the stability, the structure, surface functional groups, the band gap and visible light absorption properties of catalysts are crucial for U(VI) adsorption-photocatalytic reduction. Alam et al (2018) studied the adsorption of U(VI) on biochar and found that the proton-active carboxyl group (-COOH) and phenolic hydroxy group (-OH) contributed mainly to U(VI) uptake, suggesting the importance of the functional groups on U(VI) adsorption.…”

Section: Metal Cationsmentioning

confidence: 99%

Application of biochar-based photocatalysts for adsorption-(photo)degradation/reduction of environmental contaminants: mechanism, challenges and perspective

Cai

Zhang

et al. 2022

Biochar

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The fast increase of population results in the quick development of industry and agriculture. Large amounts of contaminants such as metal ions and organic contaminants are released into the natural environment, posing a risk to human health and causing environment ecosystem problems. The efficient elimination of contaminants from aqueous solutions, photocatalytic degradation of organic pollutants or the in-situ solidification/immobilization of heavy metal ions in solid phases are the most suitable strategies to decontaminate the pollution. Biochar and biochar-based composites have attracted multidisciplinary interests especially in environmental pollution management because of their porous structures, large amounts of functional groups, high adsorption capacities and photocatalysis performance. In this review, the application of biochar and biochar-based composites as adsorbents and/or catalysts for the adsorption of different contaminants, adsorption-photodegradation of organic pollutants, and adsorption-(photo)reduction of metal ions are summarized, and the mechanism was discussed from advanced spectroscopy analysis and DFT calculation in detail. The doping of metal or metal oxides is the main strategy to narrow the band gap, to increase the generation and separation of photogenerated e−-h+ pairs, to produce more superoxide radicals (·O2−) and hydroxyl radicals (·OH), to enhance the visible light absorption and to increase photocatalysis performance, which dominate the photocatalytic degradation of organic pollutants and (photo)reduction of high valent metals to low valent metals. The biochar-based composites are environmentally friendly materials, which are promising candidates in environmental pollution cleanup. The challenge and perspective for biochar-based catalysts are provided in the end. Graphical Abstract

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“…Uranium is extremely abundant in seawater but at very low concentrations. This poses a huge challenge to exploit uranium resources in seawater. − Extracting uranium from seawater, therefore, requires an efficient method.…”

Section: Introductionmentioning

confidence: 99%

Advanced Amidoximated Polyethylene Nanofibrous Membranes for Practical Uranium Extraction from Seawater

Zhang

et al. 2022

ACS Sustainable Chem. Eng.

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As the key material of the adsorption method used for practical uranium extraction from seawater, the adsorbent should have a high uranium adsorption capacity and long service life. Polyethylene nanofibrous membranes (PENFMs) using a one-step grafting strategy to prepare scalable membrane adsorbents are reported with supreme uranium uptake capacity and long service life. A series of amidoximated polyethylene nanofibrous membrane (called amidoximated membrane or AM) adsorbent materials with different degrees of grafting (DGs) are modified by one-step radiation-induced graft polymerization (RIGP) of acrylonitrile (AN) and acrylic acid (AA) and an amidoximation reaction. The AM adsorbents prepared from the PENFM show outstanding hydrophilicity, good adsorption capacity, and excellent affinity for uranium. The highest uranium uptake capacity of AM adsorbents is 115.32 mg/g in simulated seawater for 24 h and 6.03 mg/g in natural seawater for 10 weeks. The AM adsorbents are reusable for more than 10 cycles of continuous adsorption–desorption–regeneration tests, showing the long service life. In addition, the AM adsorbent adsorption results in natural seawater indicate that only prolonging time to pursue high adsorption capacity is not conducive to the acquisition of benefits. The AM adsorbents have broad potential application in the industrialization of uranium extraction from seawater by choosing the best adsorption efficiency to achieve high adsorption amount.

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Advanced photocatalysts for uranium extraction: Elaborate design and future perspectives

Cited by 219 publications

References 147 publications

Metal-organic framework nanocrystal-derived hollow porous materials: Synthetic strategies and emerging applications

Metal-organic framework nanocrystal-derived hollow porous materials: Synthetic strategies and emerging applications

Application of biochar-based photocatalysts for adsorption-(photo)degradation/reduction of environmental contaminants: mechanism, challenges and perspective

Advanced Amidoximated Polyethylene Nanofibrous Membranes for Practical Uranium Extraction from Seawater

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