Rapid and long-lasting acceleration of zero-valent iron nanoparticles@Ti₃C₂-based MXene/peroxymonosulfate oxidation with bi-active centers toward ranitidine removal

Abstract

Advanced oxidation processes (AOPs) can effectively degrade ranitidine, a pharmaceutical that is a typical precursor of nitrosamine dimethylamine (NDMA), an extremely potent human carcinogen. Herein, novel magnetic Ti3C2-based MXene nanosheets...

Synergistic Effect between Ni and Ce Dual Active Centers Initiated by Activated Fullerene Soot for Electro-Fenton Degradation of Tetracycline

“…After the reactions, the relative peak areas of Ni 2p and Ce 3d were changed to different degrees, suggesting NiO and CeO 2 as the two members taking part in the degradation reaction. This result is completely consistent with the definition of dual active centers [23], thus proving that the hypothesis about Ni-Ce dual active centers is tenable. The electro-Fenton degradation of TC by NiO, CeO 2 , and 0.4NiO-CeO 2 composites was investigated.…”

“…Then, we used the co-precipitation method to prepare NiO-doped CeO 2 (yNiO-CeO 2 ) nanoparticles and loaded them on AFS by the impregnation method. According to the definition of dual active centers, two similar catalysts participate in catalyzing the same type of reaction in a system [23], and the prepared composite of 0.4NiO-CeO 2 fully meets this standard. As a result, 0.4(0.4NiO-CeO 2 )-AFS thus formed shows remarkable performance for the electro-Fenton degradation of tetracycline (TC).…”

Current Mechanism of Peroxymonosulfate Activation by Cobalt-Based Heterogeneous Catalysts in Degrading Organic Compounds

“…The first is the reaction coordinate graph, which is calculated using the search transition state method. This graph can reveal the energy barrier (E b ) required for the reaction to occur, and reactions that can occur at room temperature typically having an E b of less than 0.9 eV. − Additionally, the total reaction energy (E r ) can be calculated, and a positive value indicates that an external energy intervention is required for the reaction to occur. The second method involves obtaining the reaction path diagram using the free energy correction calculation method, which replaces the energy calculated at 0 K by the DFT method with the actual temperature.…”

“…However, there is no systematic study of theoretical calculations in these regards. The combination of MXene, a novel material, and Co-based catalysts for PMS activation shows promising efficiency and offers structural advantages, as well as the potential for intermetallic synergy. ,, Theoretical calculations play a crucial role in guiding the design of such catalysts.…”

Cobalt-ferrite functionalized graphitic carbon nitride (CoFe2O4@g-C3N4) nanoconfined catalytic membranes for efficient water purification: performance and mechanism

“…These anions may inhibit catalytic activity by consuming and converting reactive oxygen species. 29,[33][34][35] The effect of different pH values of the feed solution on the CoFe 2 O 4 @g-C 3 N 4 membrane/PMS system was also investigated (Fig. 5b).…”