Highly efficient uranium extraction by a piezo catalytic reduction-oxidation process

Applied Catalysis B Environment and Energy, Год журнала: 2022, Номер 310, С. 121343 - 121343

Опубликована: Март 24, 2022

Язык: Английский

---

Insight into the Key Role of Cr Intermediates in the Efficient and Simultaneous Degradation of Organic Contaminants and Cr(VI) Reduction via g-C₃N₄-Assisted Photocatalysis

Environmental Science & Technology, Год журнала: 2022, Номер 56(6), С. 3552 - 3563

Опубликована: Фев. 25, 2022

Photocatalysis provides an impetus for the synergetic removal of Cr(VI) and organic contaminants, but generation Cr intermediates their potential oxidizability may be overlooked in pollutant conversion. Herein, reduction process were emphasized Cr(VI)/bisphenol A (BPA) by using graphitic carbon nitride as a photocatalyst. The active species BPA photodegradation system Cr(VI)/BPA suggested that indeed promotes photodegradation. Electron paramagnetic resonance (EPR) complexes situ variable-temperature EPR analysis demonstrated Cr(V) intermediate (g = 1.978) its oxidization degradation photocatalysis. By adding electron donor Na2SO3, was induced solution, further confirming positive effect Cr(V). Moreover, difference products BPA/air, Cr(VI)/BPA/air, Cr(VI)/BPA/Ar systems indirectly explained why involved degradation. Density functional theory calculations revealed photogenerated electrons can reduce free energy (0.98 eV) converting into Cr(V), which facilitate subsequent oxidation step This work contributes to exploration synergistic pollutants Cr(VI)/organics systems.

Язык: Английский

---

Application of covalent organic frameworks and metal–organic frameworks nanomaterials in organic/inorganic pollutants removal from solutions through sorption-catalysis strategies

Carbon Research, Год журнала: 2023, Номер 2(1)

Опубликована: Фев. 9, 2023

Abstract With the fast development of agriculture, industrialization and urbanization, large amounts different (in)organic pollutants are inevitably discharged into ecosystems. The efficient decontamination contaminants is crucial to human health ecosystem pollution remediation. Covalent organic frameworks (COFs) metal–organic (MOFs) have attracted multidisciplinary research interests because their outstanding physicochemical properties like high stability, surface areas, sorption capacity or catalytic activity. In this review, we summarized recent works about elimination/extraction pollutants, heavy metal ions, radionuclides by MOFs COFs nanomaterials through sorption-catalytic degradation for chemicals reduction-precipitation-extraction metals radionuclides. interactions between COFs/MOFs at molecular level were discussed from density functional theory calculation spectroscopy analysis. was mainly dominated electrostatic attraction, π-π interaction, complexation H-bonding whereas ions attributed complexation, ion exchange, reduction incorporation reactions. porous structures, groups, active sites important ability selectivity. doping co-doping metal/nonmetal, with other materials could change visible light harvest generation/separation electrons/holes (e − /h + ) pairs, thereby enhanced photocatalytic challenges possible application in elimination water described end.

Язык: Английский

---

Photocatalytic reduction of uranium(VI) under visible light with 2D/1D Ti3C2/CdS

Chemical Engineering Journal, Год журнала: 2021, Номер 420, С. 129831 - 129831

Опубликована: Апрель 19, 2021

Язык: Английский

---

Mechanistic investigation of rapid catalytic degradation of tetracycline using CoFe2O4@MoS2 by activation of peroxymonosulfate

Separation and Purification Technology, Год журнала: 2022, Номер 287, С. 120525 - 120525

Опубликована: Янв. 22, 2022

Язык: Английский

---