Ce-Co-Mn-Zn ferrite nano catalyst: A synergetic effect of rare earth Ce3+ on enhanced optical properties and photocatalysis

Al-Bassami, N.S.; Mansour, S.F.; Abdel-Fattah, E.; Abdo, M.A.

doi:10.1016/j.ceramint.2023.03.191

Cited by 31 publications

(6 citation statements)

References 69 publications

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“…The content of lattice oxygen increased for the doped sample except for Mn-NTO, and the Ce-doped sample increased the most, compared with NTO. Fe 2+ /Fe 3+ , Ce 3+ /Ce 4+ , Ni 2+ /Ni 3+ , Mn 2+ /Mn 4+ , Bi 3+ and metallic Bi were found in Figure S2, which is consistent with the literature [27,28]. The lowest O 2− and highest O − /O 2 − for Mn-NTO aligned with the closest radius for Mn and Ta [28].…”

Section: Xps Analysis Of Catalystssupporting

confidence: 89%

Visible Light Photocatalytic Degradation Performance of Metal (Fe, Ce, Ni, Mn, Bi)-Doped Sodium Tantalite Perovskite

Huang,

Zhan,

Wen

et al. 2023

Catalysts

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Metal ion doping is the most widely used means to improve the photocatalytic performance of semiconductor materials, which can adjust the band gap, broaden the range of optical response and construct impurity levels. The high efficiency modified NaTaO3 perovskite catalyst with good structural and catalytic properties was synthesized by a simple hydrothermal reaction method. A variety of analysis and testing techniques, such as XRD, SEM, DRS, XPS and EPR, were used to analyze the structure properties of the prepared materials. The results show that the influence mechanism of different metal introduction on the structure and properties of the NaTaO3 perovskite was different. Metal doping promoted the bond angle of Ta-O-Ta close to 180°, which restrains the recombination of the photogenerated electron-holes in the crystal. As Ce is introduced into the perovskite, the CeO2 forms and agglomerates around the perovskite, which improves the electron transport performance. With the narrower band gap, the Ce-modified perovskite shows that the degradation rate of ARS is 84% after 180 min of photoreaction. The species of h+, O2− and ·OH play different roles in improving the performance of the photocatalytic degradation process.

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Section: Xps Analysis Of Catalystssupporting

confidence: 89%

Visible Light Photocatalytic Degradation Performance of Metal (Fe, Ce, Ni, Mn, Bi)-Doped Sodium Tantalite Perovskite

Huang,

Zhan,

Wen

et al. 2023

Catalysts

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“…During the process of photocatalytic degradation of MB using AgBr/Ag 2 CO 3 -zeolite, and h were the primary reactive radicals while had limited influence 58 . The following equations summarize the photodegradation mechanism proposed for degrading MB using CAZ 59 . Electron–hole ( e – h ) pairs could be created because the CAZ photocatalysts in the MB solution absorb light energy ( hv ) equal to or higher than their energy gap ( E g ).…”

Section: Resultsmentioning

confidence: 99%

“…A prior study found that the most useful model for determining the catalytic activity of pure MB was the first-order model 53 , 59 . Consequently, the first-order kinetic model was investigated by the following equation 62 (Eq.…”

Section: Resultsmentioning

confidence: 99%

Synthesis of novel antibacterial nanocomposite CuO/Ag-modified zeolite for removal of MB dye

Yahya,

Samir,

Al-Ariki

et al. 2023

Sci Rep

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Novel CuO/Ag nanocomposites added zeolite (CAZ) were successfully fabricated, and their effectiveness as an antibacterial on S. aureus and MB removal was evaluated. EDX, XRD, and FTIR confirm the presence of the elemental compositions of CAZ. Friable CuO nanorods (10–70 nm in diameter) existed on the surface of the zeolite. Pure zeolite had a higher band gap (5.433 eV) and lower MB removal efficiency than CAZ. The adsorption method by CAZ was more effective at removing MB than photodegradation. 0.10 CAZ had the highest removal effectiveness (~ 99%) and adsorption capacity (~ 70.4 mg g−1) of MB. The inhibitory zone diameter for 0.005 CAZ against S. aureus was 20 mm, while 0.01 CAZ had a diameter of 17 mm. Azithromycin, ceftriaxone, and erythromycin antibiotics demonstrated lower or no efficacy against S. aureus than CAZ. Significant antibacterial activities and wastewater treatment were achieved by CAZ. The combination of photodegradation and adsorption enhanced pollutant removal. It will be interesting to study further the optimal molar ratio for MB removal (0.10 CAZ) in future investigations.

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“…The light absorption is attributed to charge transition from the valence to conduction band. Mn doping enhances carrier migration on the composite surface, promoting electron trapping and photocatalytic activity [37]. The synergistic effect of Ce, La, and Mn tunes the composite's band structure and optical properties, suppressing electron-hole recombination.…”

Section: Cr(vi) Removal Testmentioning

confidence: 99%

Synthesis of Ce-La-Pr/Mn-O Ternary Oxide Composites via Co-Precipitation and Synergistic Photocatalytic Degradation of Cr(VI)

Feng,

2024

Water

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This study utilized a straightforward co-precipitation method to successfully synthesize Ce-La-X(Mn/Pr)-O composite materials for treating simulated hexavalent chromium (Cr(VI)) wastewater with distinctively porous and fluffy textures, along with tubular morphologies. Notably, Ce-La-Mn-O demonstrated a remarkable specific surface area of 96.2698 m2/g, mesoporous architecture with a pore diameter of 6.9511 nm, and an impressive adsorption capacity of 88.79 mg/g. Under optimized conditions, specifically an initial Cr(VI) concentration of 20 mg/L, a Ce-La-Mn-O dosage of 0.8 g/L, a reaction temperature of 40 °C, an initial pH of 6, and with the application of simulated daylight, the removal rate of Cr(VI) exceeded 98% within 15 min. Even after three cycles, the removal rate was maintained at above 80%. Based on a comprehensive suite of morphological, structural, and performance characterizations, the introduction of Mn/Pr was found to modify the structure of Ce-La-O and enhance the synergistic interactions among the metals within the Ce-La-O framework. In addition, Ce-La-Mn-O exhibited superior visible light absorption properties and dual functionality for catalytic reduction and adsorption. All three materials were found to form -OH polar bond functional groups, converting it to Cr(III) and subsequently forming Cr(OH)3. The Ce-La-X(Mn/Pr)-O composite materials provide a robust theoretical foundation for exploring the dual functional synergistic effects in the efficient removal of Cr(VI) from aqueous systems, indicating their vast potential for practical applications.

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Ce-Co-Mn-Zn ferrite nano catalyst: A synergetic effect of rare earth Ce3+ on enhanced optical properties and photocatalysis

Cited by 31 publications

References 69 publications

Visible Light Photocatalytic Degradation Performance of Metal (Fe, Ce, Ni, Mn, Bi)-Doped Sodium Tantalite Perovskite

Visible Light Photocatalytic Degradation Performance of Metal (Fe, Ce, Ni, Mn, Bi)-Doped Sodium Tantalite Perovskite

Synthesis of novel antibacterial nanocomposite CuO/Ag-modified zeolite for removal of MB dye

Synthesis of Ce-La-Pr/Mn-O Ternary Oxide Composites via Co-Precipitation and Synergistic Photocatalytic Degradation of Cr(VI)

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