Amino-rich Ag-NWs/NH2-MIL-125(Ti) hybrid heterostructure via LSPR effect for photo-assist uranium extraction from fluorine-containing uranium wastewater without sacrificial agents

Tu, Boyuan; Yu, Kaifu; Fu, Dengjiang; Zhou, Li; Wang, Ruixiang; Jiang, Xinying; Liu, Huanhuan; Cao, Xin; Gong, Xiang; He, Rong; Tang, Yongjian; Zhu, Wenkun

doi:10.1016/j.apcatb.2023.122965

Cited by 39 publications

(11 citation statements)

References 52 publications

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“…As shown in Figure S16, BS-ZVI can significantly increase the absorption intensity and also broaden the absorption range. In addition, the bandgap values of ZVI and BS-ZVI were determined as 2.16 and 1.88 eV, respectively, by projecting the linear cross section of the Tauc map of (ahv) 2 to the hv axis (Figure 3D). The narrowing of the bandgap provided more proof that the biological sulfurization modification improves the light absorption capability of ZVI.…”

Section: Electronic Structure and Optical Properties Of Bs-zvimentioning

confidence: 99%

“…Uranium is a radioactive element that is commonly employed in the nuclear industry . The expansion of uranium mining has led to a rapid increase in the discharge of highly mobile and complex uranium containing wastewater, constantly migrating through groundwater sources. − Once uranium migrates to the surrounding ecological environment, because of its high chemical toxicity, it can seriously impact the natural environment and human health . The enrichment and separation of uranium from uranium mine wastewater is a pressing issue that must be addressed. − Uranium is frequently found in two valence states: hexavalent uranium (U(VI)) and tetravalent uranium (U(IV)) .…”

Section: Introductionmentioning

confidence: 99%

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Enhancing Commercially Iron Powder Electron Transport by Surface Biosulfuration to Achieve Uranium Extraction from Uranium Ore Wastewater

Yang,

Wei,

Wang

et al. 2024

Inorg. Chem.

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The zero-valent iron (ZVI) has attracted increasing attention due to the enhanced reactivity of ZVI to uranium wastewater. However, ZVI practical application is hampered due to its susceptibility to oxidation and the formation of passivation layers during storage and in situ restoration. To address these issues, we used a biosulfuration approach to modify ZVI for application in uranium ore wastewater treatment. A series of physicochemical characterization tools and photoelectronic analyses showed that BS-ZVI considerably increased carrier separation efficiency and visible light absorption capacity, resulting in a significant photoassisted enhancement effect on uranium extraction. Accordingly, the uranium removal efficiency of BS-ZVI reached 91% within 60 min, and its maximum adsorption capacity was 336.3 mg/g. By analyzing the mechanism, the improved U(VI) removal performance was mostly responsible on the dissolution of the passivation layer on the surface of ZVI, the generation of Fe(II) and FeS, and the important role of Shewanella putrefaciens extracellular polymers (EPS). Overall, the BS-ZVI biohybrid merges with the high activity of ZVI, bio-FeS, and self-regeneration ability of bacteria, expanding a promising new approach for sustainable treatment of uranium mine wastewater.

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Section: Electronic Structure and Optical Properties Of Bs-zvimentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Enhancing Commercially Iron Powder Electron Transport by Surface Biosulfuration to Achieve Uranium Extraction from Uranium Ore Wastewater

Yang,

Wei,

Wang

et al. 2024

Inorg. Chem.

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“…Tu et al synthesized amino-rich Ag-NWs/NH 2 -MIL-125(Ti) (AgNW/N-M(Ti)) nanowires and applied them to the removal of U(VI) from wastewater containing fluorine ions. Due to hot electrons generated by Ag-NWs being transferred to N-M(Ti) sites quickly, the sorbed U(VI) was reduced to insoluble U(IV) with excellent U(VI) removal efficiency of 90.4%.…”

Section: Photothermal Techniquementioning

confidence: 99%

“…3D surface potential maps and the corresponding surface photovoltage spectra in the dark–light (a1, a2; b1, b2; c1, c2) and the infrared thermal images under xenon lamp irradiation (a3–a6; b3–b6; c3–c6) of AgNW/N-M(Ti), N-M(Ti), and Ag-NWs. Parts (a–c) are reprinted with permission from ref , Copyright 2023 Elsevier.…”

Section: Photothermal Techniquementioning

confidence: 99%

“…The outer MOFs acted as an ion selective layer for binding of U(VI) in aqueous solutions, whereas the tubular microchannels of bilayer MOF architecture facilitated the fast and free flow of U(VI), providing sufficient interaction of U(VI) through the chelating sites of MOFs 79. Tu et al81 synthesized amino-rich Ag-NWs/NH 2 -MIL-125(Ti) (AgNW/N-M(Ti)) nanowires and applied them to the removal of U(VI) from wastewater containing fluorine ions. Due to hot electrons generated by Ag-NWs being transferred to N-M(Ti) sites quickly, the sorbed U(VI) was reduced to insoluble U(IV) with excellent U(VI) removal efficiency of 90.4%.…”

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confidence: 99%

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Highly Selective Extraction of U(VI) from Solutions by Metal Organic Framework-Based Nanomaterials through Sorption, Photochemistry, and Electrochemistry Strategies

Liu,

Li,

Tan

et al. 2023

Langmuir

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Reducing the Exciton Binding Energy of Covalent Organic Framework Through π‐Bridges to Enhance Photocatalysis

Wang,

Zhang,

et al. 2024

Adv Funct Materials

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The pronounced exciton binding energy (Eb) in covalent organic frameworks (COFs) results in significant energy loss, thereby constraining the photocatalytic efficiency of COFs. Herein, triphenylamine is employed as an electron donor, while triphenyltriazine served as an acceptor; benzene, naphthalene, and anthracene are utilized as π‐bridges with progressively increasing conjugation to synthesize a series of D‐π‐A structured COFs photocatalysts (COF‐1, COF‐2, and COF‐3). The correlation between π‐bridge structures and Eb is systematically examined through the removal of hexavalent uranium U(VI) from tailings wastewater under visible light irradiation as a model reaction. Notably, an increase in π‐bridge conjugation initially enhanced and then diminished the photocatalytic properties of these three catalysts. This phenomenon can be attributed to the fact that coplanarity within the COFs frameworks does not consistently improve with greater π‐bridge conjugations; specifically, COF‐2 featuring a naphthalene π‐bridge exhibited the smallest dihedral angle. The reduced dihedral angle facilitated a more planar and delocalized electron transport pathway between donor and acceptor moieties, leading to decreased Eb and inhibited exciton recombination. Consequently, COF‐2 demonstrated exceptional photocatalytic reduction of U(VI), achieving efficiencies 1.8 times and 1.5 times greater than those of COF‐1 and COF‐3, respectively. This approach offers novel insights into mitigating Eb in COFs‐based photocatalysts.

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Amino-rich Ag-NWs/NH2-MIL-125(Ti) hybrid heterostructure via LSPR effect for photo-assist uranium extraction from fluorine-containing uranium wastewater without sacrificial agents

Cited by 39 publications

References 52 publications

Enhancing Commercially Iron Powder Electron Transport by Surface Biosulfuration to Achieve Uranium Extraction from Uranium Ore Wastewater

Enhancing Commercially Iron Powder Electron Transport by Surface Biosulfuration to Achieve Uranium Extraction from Uranium Ore Wastewater

Highly Selective Extraction of U(VI) from Solutions by Metal Organic Framework-Based Nanomaterials through Sorption, Photochemistry, and Electrochemistry Strategies

Reducing the Exciton Binding Energy of Covalent Organic Framework Through π‐Bridges to Enhance Photocatalysis

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