Study of Fe-doped and glucose-capped CeO2 nanoparticles synthesized by co-precipitation method

Taddesse, Paulos; Parajuli, D.; Murali, N.

doi:10.1016/j.chemphys.2022.111617

Cited by 20 publications

(2 citation statements)

References 46 publications

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“…However, to obtain good nanoparticle features, the preparation method is essential. Amongst the numerous wet chemical synthesis mechanisms i.e., sol-gel [30,31], hydrothermal [32][33][34][35], coprecipitation was employed in the nanopowder synthesis considering its conventionality, flexibility, economic viability, time efficiency and proper control over the morphological properties [36,37]. Despite metal oxides operating excellently at higher temperatures, they are considered uneconomical and energy efficient.…”

Section: Introductionmentioning

confidence: 99%

Room Temperature-Built Gas Sensors from Green Carbon Derivative: A Comparative Study between Pristine SnO2 and GO-SnO2 Nanocomposite

Amoh,

Elwardany,

Fujii

et al. 2024

JNanoR

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Room temperature-built gas sensors were fabricated from graphene oxide (GO), pristine and doped SnO2 nanostructures. The as-synthesized green carbon derivative (GO) nanomaterials were prepared from waste plastic precursor using Modified Hummer’s methodology. Pristine SnO2 and GO-SnO2 nanocomposite were synthesized employing a wet synthesis technique known as co-precipitation. The as-prepared nanoparticles were investigated for structural crystallographic and morphological features using X-ray diffractometry (XRD) and Transmission electron microscopy (TEM) analytical techniques. High-angle annular dark field (HAADF) and elemental quantifications of the nanopowders were investigated with the Energy dispersive X-ray spectroscopy (EDX). Textural features were determined with the assistance of Brunauer-Emmett-Teller (BET) analyzer. Thermogravimetric analysis (TGA) was performed to ascertain the material stability and degradability of the synthetic materials. Functional group and bond structure analysis was conducted using Fourier-transform infrared (FTIR) spectroscopy. Gas sensor devices were tested for responses towards CH4, H2, LPG, and CO2 gases at 20 ppm concentrations of each. GO-SnO2 nanocomposite sensing device showed optimal detection response towards the respective analyte gases with values of 5.00, 5.08, 4.90 and 3.41 respectively. The prepared nanocomposite showed stability and selectivity towards the target gases in an order of magnitude of H2 > CH4 > LPG > CO2. The optimal gas sensor device’s dynamic gas sensing response was ascribed to the GO doping effect which relatively increased its surface area (46.48 m2g-1) and absorption sites.

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Section: Introductionmentioning

confidence: 99%

Room Temperature-Built Gas Sensors from Green Carbon Derivative: A Comparative Study between Pristine SnO2 and GO-SnO2 Nanocomposite

Amoh,

Elwardany,

Fujii

et al. 2024

JNanoR

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“…Several methods have been used to synthesize CeO 2 nanocrystals (NCs), e.g., coprecipitation, polymeric precursor, flow method, metalorganic chemical vapor deposition (MOCVD), sol–gel, conventional hydrothermal (CH), , microwave-assisted hydrothermal (MAH)/solvothermal, − etc. CH and MAH methods stand out for enabling ceramic oxide synthesis at low temperatures (below 200 °C), which reduces time and energy consumption .…”

Section: Introductionmentioning

confidence: 99%

The Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO₂ Nanocrystals

et al. 2023

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In this work, we focus on understanding the morphology and photocatalytic properties of CeO2 nanocrystals (NCs) synthesized via a microwave-assisted solvothermal method using acetone and ethanol as solvents. Wulff constructions reveal a complete map of available morphologies and a theoretical-experimental match with octahedral nanoparticles obtained through synthesis using ethanol as solvent. NCs synthesized in acetone show a greater contribution of emission peaks in the blue region (∼450 nm), which may be associated with higher Ce3+ concentration, originating shallow-level defects within the CeO2 lattice while for the samples synthesized in ethanol a strong orange-red emission (∼595 nm) suggests that oxygen vacancies may originate from deep-level defects within the optical bandgap region. The superior photocatalytic response of CeO2 synthesized in acetone compared to that of CeO2 synthesized in ethanol may be associated with an increase in long-/short-range disorder within the CeO2 structure, causing the E gap value to decrease, facilitating light absorption. Furthermore, surface (100) stabilization in samples synthesized in ethanol may be related to low photocatalytic activity. Photocatalytic degradation was facilitated by the generation of ·OH and ·O2 – radicals as corroborated by the trapping experiment. The mechanism of enhanced photocatalytic activity has been proposed suggesting that samples synthesized in acetone tend to have lower e′h· pair recombination, which is reflected in their higher photocatalytic response.

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Construction of magnetic bimetallic oxide‐decorated attapulgite‐based adsorbents for arsenic ion adsorption

Yu,

Li,

et al. 2024

J of Chemical Tech & Biotech

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BACKGROUNDArsenic contamination can exert severe detrimental effects on the ecological environment and human health. It can cause acute or chronic poisoning, resulting in cell distortion or cancer when humans come into contact with or consume arsenic‐containing water. Adsorption technology is one of the effective methods for arsenic removal. In this study, using attapulgite (ATP) as a support for bimetallic iron–manganese oxides, a series of adsorbents (Fe‐Mn/ATP) with different manganese‐to‐iron molar ratios were prepared via the coprecipitation method. Scanning electron microscopy coupled with energy‐dispersive X‐ray spectroscopy mapping, X‐ray diffraction and zeta potential measurements were used to analyze the structure and properties of Fe‐Mn/ATP. In addition, the adsorption performance of the material for arsenic ions was investigated by static adsorption and dynamic adsorption experiments.RESULTSA novel Fe‐Mn/ATP adsorbent was prepared using ATP as the raw material and manganese‐to‐iron molar ratio was 1:3 by coprecipitation at 60 °C for 1 h. The adsorption efficiency of arsenic ions was optimal at an Fe‐Mn/ATP dosage of 2 g L−1, pH 4 and a contact time of 10 min, reaching a maximum adsorption capacity of 38.27 mg g−1 at room temperature. The adsorption process followed the pseudo‐second‐order kinetic model and the Langmuir isotherm adsorption model, indicating that arsenic ion adsorption by Fe‐Mn/ATP was mainly monolayer chemical adsorption. Furthermore, Fe‐Mn/ATP showed a removal rate for arsenic ions of over 80% after four cycles of regeneration, revealing a great potential for practical application.CONCLUSIONThis study offers a promising Fe‐Mn/ATP adsorbent for removal of arsenic ions from wastewater. © 2024 Society of Chemical Industry (SCI).

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Study of Fe-doped and glucose-capped CeO2 nanoparticles synthesized by co-precipitation method

Cited by 20 publications

References 46 publications

Room Temperature-Built Gas Sensors from Green Carbon Derivative: A Comparative Study between Pristine SnO2 and GO-SnO2 Nanocomposite

Room Temperature-Built Gas Sensors from Green Carbon Derivative: A Comparative Study between Pristine SnO2 and GO-SnO2 Nanocomposite

The Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO₂ Nanocrystals

Construction of magnetic bimetallic oxide‐decorated attapulgite‐based adsorbents for arsenic ion adsorption

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Study of Fe-doped and glucose-capped CeO2 nanoparticles synthesized by co-precipitation method

Cited by 20 publications

References 46 publications

Room Temperature-Built Gas Sensors from Green Carbon Derivative: A Comparative Study between Pristine SnO2 and GO-SnO2 Nanocomposite

Room Temperature-Built Gas Sensors from Green Carbon Derivative: A Comparative Study between Pristine SnO2 and GO-SnO2 Nanocomposite

The Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO2 Nanocrystals

Construction of magnetic bimetallic oxide‐decorated attapulgite‐based adsorbents for arsenic ion adsorption

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The Relationship between Photoluminescence Emissions and Photocatalytic Activity of CeO₂ Nanocrystals