Reactivity of novel Ceria–Perovskite composites CeO2- LaMO3 (MCu, Fe) in the catalytic wet peroxidative oxidation of the new emergent pollutant ‘Bisphenol F’: Characterization, kinetic and mechanism studies

Hammouda, Samia Ben; Zhao, Feiping; Safaei, Zahra; Babu, Indu; Ramasamy, Deepika Lakshmi; Sillanpää, Mika

doi:10.1016/j.apcatb.2017.06.047

Cited by 119 publications

(25 citation statements)

References 73 publications

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“…An observed an increase in core-level binding energy indicates that all of the cations in the samples (La, Ce, and Mn) are bonded to the oxygen. Most importantly, we are unable to observe the Ce ion peak in the current perovskites matrixes due to the Ce ion in LaCeMnO 3 perovskites are mostly in the tetravalent state 40 .…”

Section: Resultsmentioning

confidence: 70%

Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites

Ansari

Ahmad

Alam

et al. 2019

Sci Rep

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Ce-doped LaMnO 3 perovskite ceramics (La 1−x Ce x MnO 3 ) were synthesized by sol-gel based co-precipitation method and tested for the oxidation of benzyl alcohol using molecular oxygen. Benzyl alcohol conversion of ca. 25–42% was achieved with benzaldehyde as the main product. X-ray diffraction (XRD), thermogravimetric analysis (TGA), BET surface area, transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), temperature-programmed reduction (H 2 -TPR), temperature-programmed oxidation (O 2 -TPO), FT-IR and UV-vis spectroscopic techniques were used to examine the physiochemical properties. XRD analysis demonstrates the single phase crystalline high purity of the perovskite. The Ce-doped LaMnO 3 perovskite demonstrated reducibility at low-temperature and higher mobility of surface O 2 -ion than their respective un-doped perovskite. The substitution of Ce 3+ ion into the perovskite matrix improve the surface redox properties, which strongly influenced the catalytic activity of the material. The LaMnO 3 perovskite exhibited considerable activity to benzyl alcohol oxidation but suffered a slow deactivation with time-on-stream. Nevertheless, the insertion of the A site metal cation with a trivalent Ce 3+ metal cation led to an enhanced in catalytic performance because of atomic-scale interactions between the A and B active site. La 0.95 Ce 0.05 MnO 3 catalyst demonstrated the excellent catalytic activity with a selectivity of 99% at 120 °C.

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Section: Resultsmentioning

confidence: 70%

Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites

Ansari

Ahmad

Alam

et al. 2019

Sci Rep

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“…On the addition of Ce 3+ ions into the LaCoO 3 structure, the reflection lines are slightly shifted towards higher 2θ angles, signifying decreases in the lattice parameters. Additionally, substitution of smaller radius Ce 3+ (1.34 Å) ions at a site into LaCoO 3 crystal distorts the crystal lattice due to a reduction in crystal spacing distance 35 , 36 . The observed discrepancy in lattice parameters may be due to ion-radius mismatch on the substitution of smaller radius ion at the La 3+ site, which is in good agreement with the earlier reports (Table 1 ) 37 , 38 .…”

Section: Resultsmentioning

confidence: 99%

“…This direction is in line with the work of other researchers, who were reporting that doping increases the surface area, decreases grain sizes, and improves their optical and oxidation/reduction characteristics of the counterpart metal oxides 22 , 23 . Doping in semiconductor metal oxides is a powerful method to tailor the crystallographic, optoelectronic, magnetic, and redox properties, which then facilitates the fabrication of many optoelectronic devices 24 – 31 . It is interesting, therefore, to inspect the impact of Ce ion-doping on LaCoO 3 symmetry, its distortion in the crystal structure, grain size and redox characteristics of the as-prepared perovskites.…”

Section: Introductionmentioning

confidence: 99%

Catalytic performance of the Ce-doped LaCoO3 perovskite nanoparticles

Ansari

Adil

Alam

et al. 2020

Sci Rep

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A series of La1-xCexCoO3 perovskite nanoparticles with rhombohedral phases was synthesized via sol–gel chemical process. X-ray diffraction (XRD), Transmission Electron Microscopy (TEM), Electron Diffraction Spectroscopy (EDS), Thermogravimetric Analysis (TGA), UV–Vis spectroscopy, Fourier Transform Infrared spectra (FTIR), Nitrogen Adsorption/desorption Isotherm, Temperature Program Reduction/Oxidation (TPR/TPO), X-ray Photoelectron Spectroscopy (XPS) techniques were utilized to examine the phase purity and chemical composition of the materials. An appropriate doping quantity of Ce ion in the LaCoO3 matrix have reduced the bond angle, thus distorting the geometrical structure and creating oxygen vacancies, which thus provides fast electron transportation. The reducibility character and surface adsorbed oxygen vacancies of the perovskites were further improved, as revealed by H2-TPR, O2-TPD and XPS studies. Furthermore, the oxidation of benzyl alcohol was investigated using the prepared perovskites to examine the effect of ceria doping on the catalytic performance of the material. The reaction was carried out with ultra-pure molecular oxygen as oxidant at atmospheric pressure in liquid medium and the kinetics of the reaction was investigated, with a focus on the conversion and selectivity towards benzaldehyde. Under optimum reaction conditions, the 5% Ce doped LaCoO3 catalyst exhibited enhanced catalytic activity (i.e., > 35%) and selectivity of > 99%, as compared to the other prepared catalysts. Remarkably, the activity of catalyst has been found to be stable after four recycles.

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“…Some researchers have used rare earth elements as catalytic materials, 2 some use rare earth elements as doping elements to prepare composite metal oxide catalytic materials, 20,21 and others directly use rare earth oxides as catalysts to degrade organic pollutants. 22 All these materials exhibit more optimal removal performance.…”

Section: Introductionmentioning

confidence: 99%

Rhodamine B dye is efficiently degraded by polypropylene-based cerium wet catalytic materials

et al. 2020

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Reactivity of novel Ceria–Perovskite composites CeO2- LaMO3 (MCu, Fe) in the catalytic wet peroxidative oxidation of the new emergent pollutant ‘Bisphenol F’: Characterization, kinetic and mechanism studies

Cited by 119 publications

References 73 publications

Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites

Physico-chemical properties and catalytic activity of the sol-gel prepared Ce-ion doped LaMnO3 perovskites

Catalytic performance of the Ce-doped LaCoO3 perovskite nanoparticles

Rhodamine B dye is efficiently degraded by polypropylene-based cerium wet catalytic materials

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