Semiconducting Metal–Organic Frameworks Decorated with Spatially Separated Dual Cocatalysts for Efficient Uranium(VI) Photoreduction

Advanced Functional Materials, Journal Year: 2022, Volume and Issue: 32(20)

Published: March 25, 2022

Abstract Reduction of soluble hexavalent uranium (U(VI)) to sparingly tetravalent (U(IV)) with semiconductor photocatalysts is recognized as a novel, green, and simple U‐extraction method. Furthermore, effective charge separation utilization are critical factors achieve high‐efficiency U(VI) photoreduction. Herein, UiO‐66‐based heterostructured photocatalyst (MnO x /UiO‐66/Ti 3 C 2 T ) spatially separated dual cocatalysts nanoparticles Ti MXene nanosheets) successfully developed for efficient photoreduction without sacrificial agents. As co‐catalysts, MnO favor the trapping holes, while nanosheets tend collect electrons. Consequently, photogenerated holes electrons flow into out photocatalyst, respectively, achieving required by remove U(VI). Impressively, removal ratio via reaches 98.4% in solution after 60 min, photoreaction rate constant 0.0948 min −1 . Moreover, exhibits brilliant extraction capacity various wastewater U(VI)‐spiked real seawater. Further mechanistic studies indicates that transferred from conduction band UiO‐66 reduce generate ·O – , further leading stable crystal phase (UO )O ·2H O. extracted oxidize water.

Language: Английский

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PAA/TiO2@C composite hydrogels with hierarchical pore structures as high efficiency adsorbents for heavy metal ions and organic dyes removal

Desalination, Journal Year: 2023, Volume and Issue: 558, P. 116620 - 116620

Published: April 14, 2023

Language: Английский

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Interaction Between Prussian Blue Ultrathin Nanosheet and Ammonium Perchlorate for Highly Efficient Thermal Decomposition

Advanced Functional Materials, Journal Year: 2023, Volume and Issue: 33(21)

Published: Feb. 23, 2023

Abstract Catalytic stability is the prerequisite for catalyst to achieve high catalytic efficiency. This study finds a new path that Prussian Blue (PB) ultrathin nanosheet assembly material (PB‐NSa) designed and used reach efficient catalysis through continuous interaction with ammonium perchlorate (AP, component be catalyzed). Based on strong oxidation environment provided by AP, decomposition of PB occurs in advance, product Fe 2 O 3 accelerates AP can release large amount gas, then reacts disperses it near undecomposed finally realizing catalysis. The results show under PB‐N, “deactivation” stage thermal disappears, showing two consecutive exothermic stages, temperature peak reduced 341.1 °C, reduction range 73.1 °C. Combining kinetic calculation TG‐IR test, found PB‐NSa keep excellent stability, which depends its special structure AP. research provides design idea will greatly promote rapid industrialization.

Language: Английский

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In situ synthesis NiO@TiO2/MXene as a promoter for ammonium perchlorate based solid propellants

Applied Surface Science, Journal Year: 2024, Volume and Issue: 652, P. 159228 - 159228

Published: Jan. 4, 2024

Language: Английский

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Based on the synergistic effect of cobalt alginate/ZIF-67 strengthening the combustion and mechanical properties of ammonium perchlorate-based propellant

Materials Today Chemistry, Journal Year: 2025, Volume and Issue: 43, P. 102497 - 102497

Published: Jan. 1, 2025

Language: Английский

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Pseudo‐Oxide Metal Carbodiimides: Potential Burn Rate Modifier for the Decomposition of Ammonium Perchlorate

Propellants Explosives Pyrotechnics, Journal Year: 2025, Volume and Issue: unknown

Published: Feb. 22, 2025

ABSTRACT As a strong oxidizer, ammonium perchlorate (AP) is one of the most paramount raw materials in composite solid propellants (CSP) formulations, and thermal decomposition features AP would directly impact energy release impulsion performance CSP. CuNCN as an example metal carbodiimides explored burn rate modifier for decomposition, given their oxide counterpart belonging to typical modifiers. Our results reveal that as‐prepared can effectively accelerate AP. The additive mixture reduce activation bring down HTD by 84°C. present study highlights on effective application thermally enhanced

Language: Английский

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Synergistic effect of hollow n-Al/H-MoO3 in the gas-phase reaction zone of solid propellant

Fuel, Journal Year: 2025, Volume and Issue: 393, P. 134940 - 134940

Published: March 8, 2025

Language: Английский

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Defective-activated-carbon-encapsulated Co as a super reactive catalyst for combustion of ammonium perchlorate

Applied Surface Science, Journal Year: 2023, Volume and Issue: 615, P. 156349 - 156349

Published: Jan. 7, 2023

Language: Английский

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In-situ constructing nano ternary Ni-P-Cu alloy shell on the micro-aluminum surface: Enhancing its ignition and combustion performances

Fuel, Journal Year: 2023, Volume and Issue: 342, P. 127874 - 127874

Published: Feb. 22, 2023

Language: Английский

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Carbon nanotube-embedded metal carbonyl compound nanocomposites: Efficient catalysts for thermal decomposition of ammonium perchlorate

Applied Surface Science, Journal Year: 2024, Volume and Issue: 655, P. 159575 - 159575

Published: Feb. 3, 2024

Language: Английский

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