Understanding oxygen-deficient La2CuO4-δperovskite activated peroxymonosulfate for bisphenol A degradation: The role of localized electron within oxygen vacancy

Chen, Hanxiao; Xu, Yin; Zhu, Kangmeng; Zhang, Hui

doi:10.1016/j.apcatb.2020.119732

Cited by 183 publications

(33 citation statements)

References 76 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Therefore, CF3 was selected to analyze the proportions of various reactive oxygen species. According to the study by Chen, 61 the scavengers (MeOH, TBA, and BQ) rarely react with PMS directly, but rather mainly with reactive oxygen species produced from the catalytic reactions. As shown in Figure 5d, when the concentrations of MeOH and TBA reached 0.3 mol/L, saturation was achieved.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Robust Adsorption and Persulfate-Based Degradation of Doxycycline by Oxygen Vacancy-Rich Copper-Iron Oxides Prepared through a Mechanochemical Route

et al. 2022

View full text Add to dashboard Cite

Persulfate-based advanced oxidation over heterogeneous catalysts is an effective approach to degrade organic pollutants, and prior adsorption of the pollutants on the catalysts is an essential step. In this study, CuO/Fe 2 O 3 (CF) composite materials with a robust adsorption capacity and catalytic activity toward organic pollutants were prepared using a green mechanochemical route. The raw CuO and α-Fe 2 O 3 present in the materials were transformed into CuFe oxide catalysts with abundant oxygen vacancies during the mechanochemical reaction. The maximum adsorption capacity of CF composite materials for doxycycline was as high as 200 mg/g. First-principles density functional theory calculations revealed that the CF composite material had a very strong ability to attract and decompose persulfate and produced more reactive oxygen species, mainly 1 O 2 , O 2 −• , and SO 4 •− . Doxycycline was decomposed into CO 2 and H 2 O through three possible pathways. The efficiency of total organic carbon (TOC) removal by the CF/persulfate system was up to 90%. Our study provided a facile synthetic method (as it involved no organic solvent, was viable for use at an industrial scale, and generated no wastewater) for the preparation of catalysts with excellent performance to decontaminate wastewater.

show abstract

Section: ■ Results and Discussionmentioning

confidence: 99%

Robust Adsorption and Persulfate-Based Degradation of Doxycycline by Oxygen Vacancy-Rich Copper-Iron Oxides Prepared through a Mechanochemical Route

et al. 2022

View full text Add to dashboard Cite

show abstract

“…As shown in Figure c, H 2 PO 4 – and HCO 3 – retarded BPA degradation partly, while Cl – , NO 3 – , and SO 4 2– accelerated the degradation slightly. This phenomenon might come from the fact that H 2 PO 4 – and HCO 3 – would react with ·OH/SO 4 · – and would generate radicals with lower oxidation ability, such as CO 3 · – , H 2 PO 4 · , etc. − In addition, several reports also found that some anions had a relatively strong affinity with the surface of the catalyst or formed complex with the iron sites, thus deactivating the active sites . The slight acceleration effect of other anions might be related to the generation of highly active intermediates.…”

Section: Results and Discussionmentioning

confidence: 99%

The Confined Interlayer Growth of Ultrathin Two-Dimensional Fe₃O₄ Nanosheets with Enriched Oxygen Vacancies for Peroxymonosulfate Activation

et al. 2021

View full text Add to dashboard Cite

Developing iron-based catalysts with superior activity and stability is a longterm goal for peroxymonosulfate (PMS) activation in advanced oxidation processes. Combining the confined interlayer growth strategy with melt infiltration under dry-chemical conditions, we successfully synthesized ultrathin 2D Fe 3 O 4 nanosheets with a monolayer thickness of about 1 nm. Atomic force microscopy, CS-corrected high-resolution transmission electron microscopy, X-ray photoelectron spectroscopy, X-ray absorption fine structure, etc. jointly revealed that the 2D Fe 3 O 4 nanosheets possessed special graphene-like morphology and enriched oxygen vacancies. As highly efficient AOP catalysts, a series of refractory organic pollutants, including phenolic compounds, antibiotics, and pharmaceuticals, were degraded and mineralized effectively via the activation of PMS. On the basis of radical quenching experiments, electrochemical analysis, and theory calculations, the radical generation (•OH and SO 4•− ) and mediated electron transfer were verified to be key mechanisms in the reaction. The oxygen vacancy-rich ultrathin 2D Fe 3 O 4 mediated the electron transfer between pollutions and oxidants, prompted the redox cycle of Fe 3 O 4 , and remarkably lowered the energy barrier for interfacial charge transfer. This work could generate 2D metal oxides nanosheets with sufficient oxygen vacancies in a large scale, leading the insight for boosting the activity of iron-based catalysts.

show abstract

“…On the other hand, the presence of two different oxidation states of the metal in position B in the structure of perovskites appears to play a decisive role in their catalytic activity, making easier electron transfer processes between the surface of the perovskites and the oxidant, as it has been reported also elsewhere [42]. For example, in the case of LaCuO 3 (La 2 CuO 4 -RP-orthorombic 80%), it has been reported that copper is present as Cu(I) and Cu(II) [55]. In addition, RP-perovskite structures showed excellent variability in lattice oxygen and charge-transfer ability.…”

Section: Activation Of Persulfate By Lamo 3 Towards Phenolics Degrada...mentioning

confidence: 85%

Heterogeneous Activation of Persulfate by LaMO3 (M=Co, Fe, Cu, Mn, Ni) Perovskite Catalysts for the Degradation of Organic Compounds

et al. 2022

View full text Add to dashboard Cite

Sulfate radical-based advanced oxidation processes (SR-AOPs) are lately applied for the degradation of various pollutants through the formation of reactive oxidant species (ROS) from activation of oxidants, such as persulfate (PS) or peroxymonosulfate (PMS). In this study, LaMO3 (M=Co, Fe, Cu, Mn, Ni) perovskite catalysts were synthesized, characterized by several techniques, and tested for the activation of persulfate towards the degradation of phenolic pollutants. The effect of substitution of position B of La-based perovskites as well as calcination temperature was studied. Overall, the results showed that the decisive role in the catalytic activity was the presence of structures that enhance the transfer of electrons between perovskite and oxidant. LaNiO3 followed by LaCoO3 were found as the most active catalysts. Finally, the stability of the catalysts was studied, showing that B-metal leaching is significant for both catalysts, with LaCoO3 being the most stable one.

show abstract

Understanding oxygen-deficient La2CuO4-δperovskite activated peroxymonosulfate for bisphenol A degradation: The role of localized electron within oxygen vacancy

Cited by 183 publications

References 76 publications

Robust Adsorption and Persulfate-Based Degradation of Doxycycline by Oxygen Vacancy-Rich Copper-Iron Oxides Prepared through a Mechanochemical Route

Robust Adsorption and Persulfate-Based Degradation of Doxycycline by Oxygen Vacancy-Rich Copper-Iron Oxides Prepared through a Mechanochemical Route

The Confined Interlayer Growth of Ultrathin Two-Dimensional Fe₃O₄ Nanosheets with Enriched Oxygen Vacancies for Peroxymonosulfate Activation

Heterogeneous Activation of Persulfate by LaMO3 (M=Co, Fe, Cu, Mn, Ni) Perovskite Catalysts for the Degradation of Organic Compounds

Contact Info

Product

Resources

About

Understanding oxygen-deficient La2CuO4-δperovskite activated peroxymonosulfate for bisphenol A degradation: The role of localized electron within oxygen vacancy

Cited by 183 publications

References 76 publications

Robust Adsorption and Persulfate-Based Degradation of Doxycycline by Oxygen Vacancy-Rich Copper-Iron Oxides Prepared through a Mechanochemical Route

Robust Adsorption and Persulfate-Based Degradation of Doxycycline by Oxygen Vacancy-Rich Copper-Iron Oxides Prepared through a Mechanochemical Route

The Confined Interlayer Growth of Ultrathin Two-Dimensional Fe3O4 Nanosheets with Enriched Oxygen Vacancies for Peroxymonosulfate Activation

Heterogeneous Activation of Persulfate by LaMO3 (M=Co, Fe, Cu, Mn, Ni) Perovskite Catalysts for the Degradation of Organic Compounds

Contact Info

Product

Resources

About

The Confined Interlayer Growth of Ultrathin Two-Dimensional Fe₃O₄ Nanosheets with Enriched Oxygen Vacancies for Peroxymonosulfate Activation