Synergistic catalysis of Fe3O4/CuO bimetallic catalyst derived from Prussian blue analogues for the efficient decomposition of various organic pollutants

Akram, Naeem; Ma, Wenlan; Guo, Jia; Guo, Yuan; Zhao, Yingjie; Hassan, Afaq; Wang, Jide

doi:10.1016/j.chemphys.2020.110974

Cited by 43 publications

(7 citation statements)

References 57 publications

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“…86−0513) and possess high crystallinity and purity. 28 However, the peak intensities of PBA−C-I and PBA−N-I significantly attenuate, although similar spectra could be observed. This phenomenon may be closely related to the synthetic process of Prussian blue analogues with the assistance of CTAB.…”

Section: Synthesis and Physical Structurementioning

confidence: 52%

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Constructing Active Cu²⁺–O–Fe³⁺ Sites at the CuO–Fe₃O₄ Interface to Promote Activation of Surface Lattice Oxygen

Zhu,

Huang,

et al. 2023

Environ. Sci. Technol.

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Activating surface lattice oxygen (Olatt) through the modulation of metal–oxygen bond strength has proven to be an effective route for facilitating the catalytic degradation of volatile organic compounds (VOCs). Although this strategy has been implemented via the construction of the TM1–O–TM2 (TM represents a transition metal) structure in various reactions, the underlying principle requires exploration when using different TMs. Herein, the Cu2+–O–Fe3+ structure was created by developing CuO–Fe3O4 composites with enhanced interfacial effect, which exhibited superior catalytic activity to their counterparts, with T 90 (the temperature of toluene conversion reaching 90%) decreasing by approximately 50 °C. Structural analyses and theoretical calculations demonstrated that the active Cu2+–O–Fe3+ sites at the CuO–Fe3O4 interface improved low-temperature reducibility and oxygen species activity. Particularly, X-ray absorption fine structure spectroscopy revealed the contraction and expansion of Cu–O and Fe–O bonds, respectively, which were responsible for the activation of the surface Olatt. A mechanistic study revealed that toluene can be oxidized by rapid dehydrogenation of methyl assisted by the highly active surface Olatt and subsequently undergo ring-opening and deep mineralization into CO2 following the Mars-van Krevelen mechanism. This study provided a novel strategy to explore interface-enhanced TM catalysts for efficient surface Olatt activation and VOCs abatement.

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Section: Synthesis and Physical Structurementioning

confidence: 52%

“…From Figure S1, one can see that both PBA-C and PBA-N exhibit diffraction peaks that match with those of Cu[Fe(CN) 6 ] 0.667 (JCFDS No. 86–0513) and possess high crystallinity and purity . However, the peak intensities of PBA–C-I and PBA–N-I significantly attenuate, although similar spectra could be observed.…”

Section: Resultsmentioning

confidence: 90%

Constructing Active Cu²⁺–O–Fe³⁺ Sites at the CuO–Fe₃O₄ Interface to Promote Activation of Surface Lattice Oxygen

Zhu,

Huang,

et al. 2023

Environ. Sci. Technol.

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“…Moreover, the intensity of the O 1s and C 2p peaks increased, while that of the Cu 2p peak decreased and that of Fe 2p peak remained almost unchanged. According to the XPS results (Figure S10), the spectrum showing the O 1s peak of CF3 before catalysis was deconvoluted into two peaks (Figure S10b) corresponding to lattice oxygen and oxygen vacancy. − The XPS spectrum for the O 1s peak of CF3 after catalysis was deconvoluted into three peaks, corresponding to surface-adsorbed oxygen, oxygen vacancy, and lattice oxygen. − These results generally showed that the transition from Fe 2+ and Fe 3+ and between Cu 2+ and Cu + occurred in the material after catalytic degradation. − More information about the detailed XPS analysis of CF3 was provided in the Supporting Information. Compared with the previous XRD spectra (Figure S11), the XRD spectrum of CF3 did not change significantly after the catalytic degradation of DC, indicating that CF3 could be reused.…”

Section: Results and Discussionmentioning

confidence: 95%

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

et al. 2022

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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.

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“…These values were significantly higher compared with the degradation efficiencies achieved through photocatalysis alone or PMS alone. Akram et al (2021, 696) found that CuO/Fe 3 O 4 nanocomposites exhibited outstanding degradation performance for RhB and methyl orange (MO) dyes under the synergistic effect of visible light and PMS. The synergistic effect of CuO and Fe 3 O 4 enhanced the light absorption capability of the catalyst, enabling effective degradation under various pH conditions.…”

Section: Synergistic Degradation Of Water Pollutants By Photocatalysi...mentioning

confidence: 99%

The synergistic degradation of pollutants in water by photocatalysis and PMS activation

Yueyu

2023

Water Environment Research

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In recent years, the synergistic degradation of water pollutants through advanced oxidation technology has emerged as a prominent research area due to its integration of various advanced oxidation technologies. The combined utilization of peroxymonosulfate (PMS) activation technology and photocatalysis demonstrates mild and nontoxic characteristics, enabling the degradation of water pollutants across a wide pH range. Moreover, this approach reduces the efficiency of electron hole recombination, broadens the catalyst's light response range, facilitates electron transfer of PMS, and ultimately improves its photocatalytic performance. The paper reviews the current research status of photocatalytic technology and PMS activation technology, respectively, while highlighting the advancements achieved through the integration of photocatalytic synergetic PMS activation technology for water pollutant degradation. Furthermore, this review delves into the mechanisms involving both free radicals and non‐radicals in the reaction process, and presents a promising prospect for future development in water treatment technology.

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Synergistic catalysis of Fe3O4/CuO bimetallic catalyst derived from Prussian blue analogues for the efficient decomposition of various organic pollutants

Cited by 43 publications

References 57 publications

Constructing Active Cu²⁺–O–Fe³⁺ Sites at the CuO–Fe₃O₄ Interface to Promote Activation of Surface Lattice Oxygen

Constructing Active Cu²⁺–O–Fe³⁺ Sites at the CuO–Fe₃O₄ Interface to Promote Activation of Surface Lattice Oxygen

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

The synergistic degradation of pollutants in water by photocatalysis and PMS activation

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Synergistic catalysis of Fe3O4/CuO bimetallic catalyst derived from Prussian blue analogues for the efficient decomposition of various organic pollutants

Cited by 43 publications

References 57 publications

Constructing Active Cu2+–O–Fe3+ Sites at the CuO–Fe3O4 Interface to Promote Activation of Surface Lattice Oxygen

Constructing Active Cu2+–O–Fe3+ Sites at the CuO–Fe3O4 Interface to Promote Activation of Surface Lattice Oxygen

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

The synergistic degradation of pollutants in water by photocatalysis and PMS activation

Contact Info

Product

Resources

About

Constructing Active Cu²⁺–O–Fe³⁺ Sites at the CuO–Fe₃O₄ Interface to Promote Activation of Surface Lattice Oxygen

Constructing Active Cu²⁺–O–Fe³⁺ Sites at the CuO–Fe₃O₄ Interface to Promote Activation of Surface Lattice Oxygen