Synthesis, characteristics, and redox properties of Zr/Sn-doped CeO2 nanoparticles in H2 gas at high temperatures

Choi, Yeon-Bin; Kim, Bong-Gu; Son, Jeong-Hun; Jung, Yeon‐Gil

doi:10.1016/j.ceramint.2019.03.226

Cited by 9 publications

(3 citation statements)

References 36 publications

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“…Compared to the standard CeO2 car characteristic peaks of Ce-La-Pr and Ce-La-Mn shifted towards lower angles, partic in regions such as the (111), ( 200), (220), and (311). Compared to Ce-La and Ce-La-P diffraction peaks in the sample were clearly visible on each corresponding crystal p but their intensities were significantly reduced, and the half-peak width was wider indicates a decrease in material crystallinity and grain size [25]. For Ce-La-Mn, whe doping levels of La and Mn are low, these elements primarily occupy la ice sites w CeO2, replacing some Ce atoms.…”

Section: Crystal Structure Morphology Of Compositesmentioning

confidence: 92%

“…Compared to Ce-La and Ce-La-Pr, the diffraction peaks in the sample were clearly visible on each corresponding crystal plane, but their intensities were significantly reduced, and the half-peak width was wider. This indicates a decrease in material crystallinity and grain size [25]. For Ce-La-Mn, when the doping levels of La and Mn are low, these elements primarily occupy lattice sites within CeO 2 , replacing some Ce atoms.…”

Section: Crystal Structure Morphology Of Compositesmentioning

confidence: 99%

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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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Section: Crystal Structure Morphology Of Compositesmentioning

confidence: 92%

Section: Crystal Structure Morphology Of Compositesmentioning

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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“…However, it should be noted that, based on the optimum critical pressure conditions provided, the experimental operational dangers would be apparently reduced. On the one end, as a bottom-up approach, several types of nanocomposites produced by the scCO 2 -assisted processes from the atomic level to defined structures often result in improved performance compared to their substrates due to their highly advantageous morphological attributes and enriched physicochemical properties [ 25 , 35 ] . On the other hand, as a prototype of a top-down approach, the utilization of scCO 2 can facilitate the exfoliation of the prepared materials, resulting in two-dimensional (2D) nanosheets.…”

Section: Introductionmentioning

confidence: 99%

Role of supercritical carbon dioxide (scCO₂) in fabrication of inorganic-based materials: a green and unique route

Líu

Chen

Pan

et al. 2021

Science and Technology of Advanced Materials

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In recent times, the supercritical carbon dioxide (scCO 2 ) process has attracted increasing attention in fabricating diverse materials due to the attractive features of environmentally benign nature and economically promising character. Owing to these unique characteristics and high-penetrability, as well as diffusivity conditions of scCO 2 , this high-pressure technology, with mild operation conditions, cost-effective, and non-toxic, among others, is often applied to fabricate various organic and inorganic-based materials, resulting in the unique crystal architectures (amorphous, crystalline, and heterojunction), tunable architectures (nanoparticles, nanosheets, and aerogels) for diverse applications. In this review, we give an emphasis on the fabrication of various inorganic-based materials, highlighting the recent research on the driving factors for improving the quality of fabrication in scCO 2 , procedures for production and dispersion in scCO 2 , as well as common indicators utilized to assess quality and processing ability of materials. Next, we highlight the effects of specific properties of scCO 2 towards synthesizing the highly functional inorganic-based nanomaterials. Finally, we summarize this compilation with interesting perspectives, aiming to arouse a more comprehensive utilization of scCO 2 to broaden the horizon in exploring the green/eco-friendly processing of such versatile inorganic-based materials. Together, we firmly believe that this compilation endeavors to disclose the latent capability and universal prevalence of scCO 2 in the synthesis and processing of inorganic-based materials.

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Production of light olefins by catalytic hydrogenation of CO2 over Y2O3/Fe-Co modified with SAPO-34

Oni

Sanni

Ibegbu

2022

Applied Catalysis A: General

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Synthesis, characteristics, and redox properties of Zr/Sn-doped CeO2 nanoparticles in H2 gas at high temperatures

Cited by 9 publications

References 36 publications

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

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

Role of supercritical carbon dioxide (scCO₂) in fabrication of inorganic-based materials: a green and unique route

Production of light olefins by catalytic hydrogenation of CO2 over Y2O3/Fe-Co modified with SAPO-34

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Synthesis, characteristics, and redox properties of Zr/Sn-doped CeO2 nanoparticles in H2 gas at high temperatures

Cited by 9 publications

References 36 publications

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

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

Role of supercritical carbon dioxide (scCO2) in fabrication of inorganic-based materials: a green and unique route

Production of light olefins by catalytic hydrogenation of CO2 over Y2O3/Fe-Co modified with SAPO-34

Contact Info

Product

Resources

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Role of supercritical carbon dioxide (scCO₂) in fabrication of inorganic-based materials: a green and unique route