Boosting uranium extraction from Seawater by micro-redox reactors anchored in a seaweed-like adsorbent

Nature Communications, Journal Year: 2024, Volume and Issue: 15(1)

Published: Oct. 23, 2024

Efficient extraction of uranium from seawater is expected to provide virtually infinite fuel sources power nuclear reactors and thus enable sustainable development energy. The efficiency for greatly depends on the availability active adsorption sites adsorbents. Maximization utilization rate binding in adsorbent vital improving capacity. Herein, micro-redox functioned by Cu(I)/Cu(II) conversion are constructed internally an bearing both amidoxime carboxyl groups induce regeneration inactivated enhance capture. This has high capacity (962.40 mg-U/g-Ads), superior anti-fouling ability as well excellent uptake (14.62 mg-U/g-Ads) natural after 56 days, placing it at top high-performance sorbent materials harvest seawater.

Language: Английский

---

A strategy for the preparation of super-hydrophilic molybdenum disulfide composites applied to remove uranium from wastewater

Dalton Transactions, Journal Year: 2024, Volume and Issue: 53(11), P. 5020 - 5033

Published: Jan. 1, 2024

The adsorption process of uranyl ions by MoS 2 /NiCo-LDH composites.

Language: Английский

---

Enhancing the uranium (VI) adsorption performance of phosphoric acid functionalized porous silica by controlled introduction of phosphoric acid group

Journal of environmental chemical engineering, Journal Year: 2024, Volume and Issue: 12(5), P. 113950 - 113950

Published: Aug. 27, 2024

Language: Английский

---

Novel chitosan-based derivative material loaded with the diethylenetriamine pentamethylene phosphonic acid for efficient adsorption of uranyl ions from weakly acidic wastewater

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: 343, P. 127112 - 127112

Published: March 14, 2024

Language: Английский

---

Molecular Models of Atomically Dispersed Uranium at MoS₂ Surfaces Reveal Cooperative Mechanism of Water Reduction

Journal of the American Chemical Society, Journal Year: 2024, Volume and Issue: 146(29), P. 20147 - 20157

Published: July 10, 2024

Single atoms of uranium supported on molybdenum sulfide surfaces (U@MoS2) have been recently demonstrated to facilitate the hydrogen evolution reaction (HER) through electrocatalysis. Theoretical calculations predicted hydroxide moieties bound edge-sulfur MoS2 as a proposed transition state involved in HER process. However, isolation relevant intermediates this process remains challenge, rendering mechanistic hypotheses unverified. The present work describes and characterization uranium-hydroxide intermediate using [(Cp*3Mo3S4)UCp*], molecular model reduced center at MoS2. Mechanistic investigations highlight metalloligand cooperativity with water activation pathway. corresponding uranium-oxo analogue, [(Cp*3Mo3S4)Cp*U(═O)], was also accessed from cluster via atom transfer [(Cp*3Mo3S4)UCp*] an alternative direct oxygen transfer. These results provide atomistic perspective reactivity low-valent toward water, modeling key associated U@MoS2 catalysts.

Language: Английский

---

Rapid and selective uranium adsorption by a low-cost, eco-friendly, and in-situ prepared nano-ZnS/alkali-activated collagen fiber composite

Separation and Purification Technology, Journal Year: 2023, Volume and Issue: 333, P. 125856 - 125856

Published: Nov. 26, 2023

Language: Английский

---

Polysulfide grafted with hydrophilic group for efficient capture of uranium (VI) from water

Separation and Purification Technology, Journal Year: 2024, Volume and Issue: unknown, P. 131281 - 131281

Published: Dec. 1, 2024

Language: Английский

---

Preparation of fibrous polymer grafted magnetic chitosan beads and modified with hydrazone and imidazole groups: isolation of U(VI) ions from seawater

Journal of Radioanalytical and Nuclear Chemistry, Journal Year: 2025, Volume and Issue: unknown

Published: March 29, 2025

Abstract The magnetic chitosan beads were prepared and grafted with glycidylmethacrylate, then diaminomelanonitrile (DAMN) was attached. nitrile groups of DAMN reacted hydrazine hydrate hydrochloride hydrate-ethylene diamine to obtain (HYD) imidazole (IMDZ) groups, respectively. Both adsorbents removed uranyl ions from the aqueous medium seawater. adsorption capacities Fe₃O₄@CHT@p(GMA)-HYD Fe₃O₄@CHT@p(GMA)-IMDZ, 328.4 434.7 mg/g, have high performance for adsorbing U(VI) synthesized used isolate seawater in presence various ions.

Language: Английский

---

The electrochemistry of stable sulfur isotopes versus lithium

Proceedings of the National Academy of Sciences, Journal Year: 2024, Volume and Issue: 121(14)

Published: March 25, 2024

Sulfur in nature consists of two abundant stable isotopes, with more neutrons the heavy one ( 34 S) than light 32 S). The isotopes show similar physicochemical properties and are usually considered an integral system for chemical research various fields. In this work, a model study based on Li–S battery was performed to reveal variation between electrochemical S isotopes. Provided same octatomic ring structure, cyclo - 8 molecules form stronger S–S bonds prone react Li. soluble Li polysulfides generated by Li– conversion reaction cation–solvent interaction yet weaker cation–anion S-based counterparts, which facilitates quick solvation hinders their migration from cathode anode. Consequently, cell shows improved kinetics at solid–liquid interface inhibited shuttle through electrolyte so that it demonstrates better cycling performance cell. Based varied isotopic-S-based polysulfides, separation method S/ isotope is proposed, enables notably higher factor conventional methods via exchange or distillation brings opportunities low-cost manufacture, utilization, chalcogen

Language: Английский

---

Hollow S-Doped ZnFe₂O₄ Microcubes with Magnetic Separability for Photocatalytic Removal of Uranium(VI) under Different Light Intensity

Inorganic Chemistry, Journal Year: 2024, Volume and Issue: 63(24), P. 11369 - 11380

Published: May 31, 2024

Under xenon lamps, ZnFe2O4 (ZFO) has been shown to be effective in removing uranium through photocatalysis. However, its performance is still inadequate low-light environments due low photon utilization and high electron–hole complexation. Herein, S-doped hollow microcubes (Sx-H-ZFO, x = 1, 3, 6, 9) were synthesized using the MOF precursor template method. The morphology improves of visible light by refracting reflecting incident multiple times within confined domain. S doping narrows band gap shifts conduction position negatively, which enhances separation, migration, accumulation photogenerated charges. Additionally, increases number adsorption sites, ultimately promoting efficient surface reactions. Consequently, Sx-H-ZFO capable U(VI) environments. cloudy rainy weather conditions, photocatalytic rate S3-H-ZFO was 100.31 μmol/(g·h), while under LED lamps (5000 Lux) it 72.70 μmol/(g·h). More interestingly, a systematic mechanistic investigation revealed that replaces some oxygen atoms enhance electron transfers O2. This process initiates formation hydrogen peroxide, reacts directly with UO22+ form solid studtite (UO2)O2·2H2O. promising magnetic separation capability facilitates recycling reusability material. work demonstrates potential extraction from nuclear wastewater.

Language: Английский

---