MnOx–CeO2 Derived from Mn–Ce-MOFs with Highly Efficient Removal of Formaldehyde

Liu, Jurong; Zheng, Yu; Zhu, Qinyu; Dong, Yaxin; Lu, Suhong; Peng, Bo; Chen, Yuliang; Zeng, Shanghong; Li, Kelun

doi:10.1007/s10563-020-09301-9

Cited by 10 publications

(7 citation statements)

References 43 publications

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“…The PXRD analysis results of the prepared MCDx catalysts is shown in Figure 1 . It can be seen from the curves that the four samples were relatively similar, with obvious diffraction peaks at around 2 θ = 7.2°, 8.6°, 11.5°, 18.6° and 19.8°, which were consistent with the previous reports of MnCe-MOF [ 28 , 29 , 30 ], indicating MCDx series catalysts successfully prepared. At the same time, the main peak shapes of the four samples were narrow and strong, manifesting MCDx in high crystallinity.…”

Section: Resultssupporting

confidence: 89%

“…The four catalysts had different wave numbers in this range, indicating that the coordination environment of the organic ligand DHTP in the MCDx structure changed at a certain extent [ 38 ]. The peaks at 608 cm −1 and 541 cm −1 correspond to the stretching vibration peaks of Mn-O and Ce-O, respectively [ 29 ], which indicated the metal ions of Mn 2+ and Ce 3+ were combined with the hydroxyl and carbonyl oxygen in the ligand DHTP after hydrothermal reaction to form a new chemical bond, further proving the successful synthesis of Mn/Ce bimetallic MOFs.…”

Section: Resultsmentioning

confidence: 99%

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Synergistic Catalytic Performance of Toluene Degradation Based on Non-Thermal Plasma and Mn/Ce-Based Bimetal-Organic Frameworks

et al. 2022

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A series of Mn/Ce-based bimetal-organic frameworks, recorded as MCDx (x = 1, 2, 4, 6), were prepared by a solvothermal synthesis method to explore their effects and performance in the synergistic catalysis of toluene under the irradiation of non-thermal plasma. The catalytic properties of different manganese loadings in MCDx for degradation of toluene were investigated. The microphysical structures of the material were analyzed by powder X-ray diffraction (PXRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis (TGA). The results showed that a MCDx coupling with non-thermal plasma can greatly improve the degradation efficiency, the energy efficiency and the CO2 selectivity, and could also significantly reduce the generation of O3 in the by-products. Among the test samples, MCD6 with Mn:Ce = 6:1 (molar ratio) showed the best catalytic performance and stability, exhibited toluene catalytic efficiency 95.2%, CO2 selectivity 84.2% and energy efficiency 5.99 g/kWh, and reduced O3 emission concentration 81.6%. This research provides a reference for the development and application of synergistic catalysis based on bimetal-organic frameworks and non-thermal plasma in the reduction of industrial volatile organic compounds.

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Section: Resultssupporting

confidence: 89%

Section: Resultsmentioning

confidence: 99%

Synergistic Catalytic Performance of Toluene Degradation Based on Non-Thermal Plasma and Mn/Ce-Based Bimetal-Organic Frameworks

et al. 2022

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“…The signal of 300–500 °C is assigned to the chemically adsorbed oxygen (O – ) adsorbed on the oxygen vacancy. The range above 500 °C is caused by the desorption of the surface lattice oxygen and bulk lattice oxygen (O 2– ) of the catalysts. − It can be seen that there is essentially no physically adsorbed oxygen on all catalyst surfaces. The surface hydroxyl content (170–300 °C) of each catalyst is roughly the same, except that it is less on CeZr catalysts (Figure S19).…”

Section: Resultsmentioning

confidence: 99%

Expediting Toluene Combustion by Harmonizing the Ce–O Strength over Co-Doped CeZr Oxide Catalysts

Shen

Deng

et al. 2023

Environ. Sci. Technol.

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Low-temperature catalytic degradation of volatile organic compounds (VOCs) by enhancing the activity of non-precious metal catalysts has always been the focus of attention. The mineralization of aromatic VOCs requires the participation of a large number of oxygen atoms, so the activation of oxygen species is crucial in the degradation reaction. Herein, we originally adjust the Ce–O bond strength in CeZr oxide catalysts by cobalt doping to promote the activation of oxygen species, thus improving the toluene degradation performance while maintaining high stability. Subsequent characterizations and theoretical calculations demonstrate that the weakening of the Ce–O bond strength increases the oxygen vacancy content, promotes the activation of oxygen species, and enhances the redox ability of the catalysts. This strategy also promotes the activation of toluene and accelerates the depletion of intermediate species. This study will contribute a strategy to enhance the activation ability of oxygen species in non-noble metal oxide catalysts, thereby enhancing the degradation performance of VOCs.

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“…11,12 In recent years, some CeO 2 -based materials have been investigated as noble-metal-free catalysts for HCHO abatement. 13–19 In those reports, CeO 2 was mostly compounded with variable-valence manganese oxide and/or cobalt oxide in which its catalytic activity can be overtly augmented. It is considered that the redox pairs of Ce 4+ /Ce 3+ and Mn 4+ (Co 3+ )/Mn 3+ (Co 2+ ) are conducive to the generation and transfer of the reactive oxygen species (ROS), 13,20 which can capture and oxidize HCHO molecules into CO 2 and water.…”

Section: Introductionmentioning

confidence: 99%

Water pretreatment promoting the removal of indoor formaldehyde over nano-CeO₂ at ambient temperature

Zhang

Chen

et al. 2023

Catal. Sci. Technol.

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MnOx–CeO2 Derived from Mn–Ce-MOFs with Highly Efficient Removal of Formaldehyde

Cited by 10 publications

References 43 publications

Synergistic Catalytic Performance of Toluene Degradation Based on Non-Thermal Plasma and Mn/Ce-Based Bimetal-Organic Frameworks

Synergistic Catalytic Performance of Toluene Degradation Based on Non-Thermal Plasma and Mn/Ce-Based Bimetal-Organic Frameworks

Expediting Toluene Combustion by Harmonizing the Ce–O Strength over Co-Doped CeZr Oxide Catalysts

Water pretreatment promoting the removal of indoor formaldehyde over nano-CeO₂ at ambient temperature

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MnOx–CeO2 Derived from Mn–Ce-MOFs with Highly Efficient Removal of Formaldehyde

Cited by 10 publications

References 43 publications

Synergistic Catalytic Performance of Toluene Degradation Based on Non-Thermal Plasma and Mn/Ce-Based Bimetal-Organic Frameworks

Synergistic Catalytic Performance of Toluene Degradation Based on Non-Thermal Plasma and Mn/Ce-Based Bimetal-Organic Frameworks

Expediting Toluene Combustion by Harmonizing the Ce–O Strength over Co-Doped CeZr Oxide Catalysts

Water pretreatment promoting the removal of indoor formaldehyde over nano-CeO2 at ambient temperature

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Water pretreatment promoting the removal of indoor formaldehyde over nano-CeO₂ at ambient temperature