Single step auto-igniting combustion technique grown CeO2 and Ni-doped CeO2 nanostructures for multifunctional applications

Alex, Javeesh; Rajkumar, S.; PrincyMerlin, J.; Aravind, Arun; Sajan, D.; Praveen, C. S.

doi:10.1016/j.jallcom.2021.160409

Cited by 31 publications

(6 citation statements)

References 74 publications

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“…Figure 2 a shows the wide-scan spectra of Undoped, 1% and 2% Pr-doped CeO 2 . As observed, all of these wide-scan spectra were dominated by the signals of Ce3d, Ce4d, O1s and C1s, and their profiles were similar to that obtained in the previous studies for CeO 2 [ 36 ]. Moreover, the corresponding Pr3d XPS regions of 1% and 2% Pr-doped CeO 2 were recorded and are shown in Figure 2 b.…”

Section: Resultssupporting

confidence: 87%

Solvothermal Synthesis, Structural Characterization and Optical Properties of Pr-Doped CeO2 and Their Degradation for Acid Orange 7

et al. 2022

Materials

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Pr-doped CeO2 with different doping levels was prepared from Ce(NO3)3∙6H2O and Pr(NO3)3∙6H2O by solvothermal method without any additional reagents, in which the mixed solution of ethylene glycol and distilled water was employed as a solvent. The influences of Pr-doping on phase composition, crystal structure and morphology were investigated, as well as Pr valence and oxygen vacancy defects. The Pr cations entered into the CeO2 crystal lattice with normal trivalence and formed a Pr-CeO2 solid solution based on the fluorite structure. The larger trivalent Pr was substituted for tetravalent Ce in the CeO2 crystal and compensated by oxygen vacancy defects, which caused the local lattice expansion of the crystal lattice. Moreover, the Pr-doped CeO2 solid solutions exhibited visible color variation from bright cream via brick red to dark brown with the increasing of Pr contents. The degradation of AO7 dye was also investigated using a domestic medical ultraviolet lamp; the removal efficiency of AO7 by 1% and 2% Pr-doped CeO2 approached 100%, much higher than 66.2% for undoped CeO2.

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Section: Resultssupporting

confidence: 87%

Solvothermal Synthesis, Structural Characterization and Optical Properties of Pr-Doped CeO2 and Their Degradation for Acid Orange 7

et al. 2022

Materials

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“…Besides, Figure 2g shows the Ce 3d spectra, in which the peaks at 900.4 eV, 907.1 eV and 916.3 eV were assigned to Ce 4+ final states of 3d 9 4f 0 , 3d 9 4f 2 and 3d 9 4f 1 , and their spin‐orbit splitting peaks were located at 881.8 eV, 888.0 eV and 897.9 eV, respectively [31] . While, the peaks at 884.3 eV and 902.8 eV were attributed to Ce 3+ 3d 5/2 and Ce 3+ 3d 3/2 and the final states were 3d 9 4f 1 and 3d 9 4f 2 , respectively [31–32] . Among them, the peak area proportion of Ce 3+ characteristic peak is closely related to the oxygen vacancy content [14] .…”

Section: Resultsmentioning

confidence: 97%

“…[31] While, the peaks at 884.3 eV and 902.8 eV attributed to Ce 3 + 3d 5/2 and Ce 3 + 3d 3/2 and the final states were 3d 9 4f 1 and 3d 9 4f 2 , respectively. [31][32] Among them, the peak area proportion of Ce 3 + characteristic peak is closely related to the oxygen vacancy content. [14] The peak intensities of Ce 3 + 3d 5/2 and Ce 3 + 3d 3/2 of CeO 2 -500 are significantly enhanced compared with the Ce 3d spectra of CeO 2 , which reveals that CeO 2 -500 had higher content of Ce 3 + and oxygen vacancy (Table S2).…”

Section: Methodsmentioning

confidence: 99%

Photocatalytic Co‐Reduction of N₂ and CO₂ with CeO₂ Catalyst for Urea Synthesis

Yang,

Zhang,

Pan

et al. 2023

Angew Chem Int Ed

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The effective conversion of carbon dioxide (CO2) and nitrogen (N2) into urea by photocatalytic reaction under mild conditions is considered to be a more environmentally friendly and promising alternative strategies. However, the weak adsorption and activation ability of inert gas on photocatalysts has become the main challenge that hinder the advancement of this technique. Herein, we have successfully established mesoporous CeO2‐x nanorods with adjustable oxygen vacancy concentration by heat treatment in Ar/H2 (90%:10%) atmosphere, enhancing the targeted adsorption and activation of N2 and CO2 by introducing oxygen vacancies. Particularly, CeO2‐500 (CeO2 nanorods heated treatment at 500 °C) revealed high photocatalytic activity toward the C‐N coupling reaction for urea synthesis with a remarkable urea yield rate of 15.5 μg/h. Besides, both aberration corrected transmission electron microscopy (AC‐TEM) and Fourier transform infrared (FT‐IR) spectroscopy were used to research the atomic surface structure of CeO2‐500 at high resolution and to monitor the key intermediate precursors generated. The reaction mechanism of photocatalytic C‐N coupling was studied in detail by combining Density Functional Theory (DFT) with specific experiments. We hope this work provides important inspiration and guiding significance towards highly efficient photocatalytic synthesis of urea.

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“…[55,56] Recently, Alex et al used single step auto-igniting combustion technique to grow CeO 2 and Ni-doped CeO 2 . [57] Electrospinning technology has also played a great role in the preparation of nanofibers, such as LaMn 0.9 Ni 0.1 O 3 nanofibers, [58] CeMO 3 (M=Co, Ni, Cu) perovskite nanofibers, [59] LaxSr 1-x CoO 3-δ nanofibers, [60] and so on.…”

Section: Other Methodsmentioning

confidence: 99%

Rare Earth‐Based Nanomaterials for Supercapacitors: Preparation, Structure Engineering and Application

Zhou

2022

ChemSusChem

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Supercapacitors (SCs) can effectively alleviate problems such as energy shortage and serious greenhouse effect. The properties of electrode materials directly affect the performance of SCs. Rare earth (RE) is known as “modern industrial vitamins”, and their functional materials have been listed as key strategic materials. In the past few years, the number of scientific reports on RE‐based nanomaterials for SCs has increased rapidly, confirming that adding RE elements or compounds to the host electrode materials with various nanostructured morphologies can greatly enhance their electrochemical performance. Although RE‐based nanomaterials have made rapid progress in SCs, there are very few works providing a comprehensive survey of this field. In view of this, a comprehensive overview of RE‐based nanomaterials for SCs is provided here, including the preparation methods, nanostructure engineering, compounds, and composites, along with their capacitance performances. The structure–activity relationships are discussed and highlighted. Meanwhile, the future challenges and perspectives are also pointed out. This Review can not only provide guidance for the further development of SCs but also arouse great interest in RE‐based nanomaterials in other research fields such as electrocatalysis, photovoltaic cells, and lithium batteries.

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Single step auto-igniting combustion technique grown CeO2 and Ni-doped CeO2 nanostructures for multifunctional applications

Cited by 31 publications

References 74 publications

Solvothermal Synthesis, Structural Characterization and Optical Properties of Pr-Doped CeO2 and Their Degradation for Acid Orange 7

Solvothermal Synthesis, Structural Characterization and Optical Properties of Pr-Doped CeO2 and Their Degradation for Acid Orange 7

Photocatalytic Co‐Reduction of N₂ and CO₂ with CeO₂ Catalyst for Urea Synthesis

Rare Earth‐Based Nanomaterials for Supercapacitors: Preparation, Structure Engineering and Application

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Single step auto-igniting combustion technique grown CeO2 and Ni-doped CeO2 nanostructures for multifunctional applications

Cited by 31 publications

References 74 publications

Solvothermal Synthesis, Structural Characterization and Optical Properties of Pr-Doped CeO2 and Their Degradation for Acid Orange 7

Solvothermal Synthesis, Structural Characterization and Optical Properties of Pr-Doped CeO2 and Their Degradation for Acid Orange 7

Photocatalytic Co‐Reduction of N2 and CO2 with CeO2 Catalyst for Urea Synthesis

Rare Earth‐Based Nanomaterials for Supercapacitors: Preparation, Structure Engineering and Application

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Photocatalytic Co‐Reduction of N₂ and CO₂ with CeO₂ Catalyst for Urea Synthesis