Structural, optical and Raman studies of Co3O4 nano-particles

Ravina,; Dalela, S.; Kumar, Shalendra; Choudhary, B. L.; Alvi, P.A.

doi:10.1016/j.matpr.2022.08.513

Materials Today: Proceedings

2023

DOI: 10.1016/j.matpr.2022.08.513

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Structural, optical and Raman studies of Co3O4 nano-particles

Ravina Ravina

S. Dalela

Shalendra Kumar

et al.

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2024

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Cited by 11 publications

References 14 publications

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Investigation of Nonmetal F‐doped Co₃O₄ as Catalyst for N₂O Catalytic Decomposition

Wu,

Wang,

Wang

et al. 2024

ChemCatChem

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An effective nonmetal F‐doped Co3O4 ( F‐Co3O4) catalyst was prepared using co‐precipitation method, and its catalytic performance was investigated for N2O decomposition comparing with pure Co3O4 catalyst. The catalytic activity test indicates that F‐Co3O4 catalyst exhibits better activity with 100% N2O conversion at a reaction temperature of 380 ℃, which is 80 ℃ lower than that of pure Co3O4. The characterization results show that F is successfully doped into the lattice of Co3O4 and replaces part of O sites, which enlarges the surface area, enhances the surface basicity and leads to higher basic sites density on the surface of Co3O4. Moreover, F doping promotes the electron donation capacity of Co2+, weakening of Co‐O bond and generation of more oxygen vacancies. The synergy of the above factors results in reduction of activation energy over F‐Co3O4 catalyst, thus F‐Co3O4 catalyst exhibits better catalytic performance than pure Co3O4 for N2O decomposition, even in the existence of O2 or H2O as impurity gas. Meanwhile, F‐Co3O4 catalyst also exhibits better stability than pure Co3O4. This work will provide practical reference for constructing efficient nonmetal‐doped Co3O4 catalysts for N2O decomposition.

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Investigation of Nonmetal F‐doped Co₃O₄ as Catalyst for N₂O Catalytic Decomposition

Wu,

Wang,

Wang

et al. 2024

ChemCatChem

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Exploration of Optical, Structural, and Electrochemical Properties of MnO₂/Mn₂O₃ Nanocomposite as Anode Material for Energy Storage Applications

Srivastava,

Ravina,

Kumar

et al. 2024

Physica Status Solidi (b)

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This article reports the synthesis of MnO2/Mn2O3 nanocomposite, which can be used in forming the anode for supercapacitor applications. The MnO2/Mn2O3 nanocomposites are synthesized via the sol–gel route and are characterized in context of structural parameters by X‐ray diffraction technique, field emission‐scanning electron microscopy (FE‐SEM), and supercapacitive behavior by cyclic voltammetry (CV) , galvanostatic charging and discharging (GCD), and electrochemical impedance spectroscopy. The spinel structure of MnO2/Mn2O3 nanocomposite with space groups Ia3 and I4/m for Mn2O3 and MnO2 nanocomposite is confirmed by the Rietveld refinement, respectively. The FE‐SEM micrographs reveal the nanosphere‐type shape of the MnO2/Mn2O3 nanocomposite. According to outcomes of electrochemical measurements, the nanocomposite exhibits good capacitive behavior in aqueous electrolyte KOH, demonstrating the highest specific capacitance (763 F g−1) at 1 Ag−1 current density from GCD. In CV, it has shown excellent performance with specific capacitance (642.93 F g−1) at 10 mV s−1. Additionally, the prepared nanocomposite‐enhanced electrolyte ion interaction may cause rapid charging and discharging, even at low current densities.

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The role of citric acid for formation of nanocrystalline MnFe2O4 ferrite

Kumari,

Sarita,

Anchal

et al. 2024

Appl. Phys. A

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Structural, optical and Raman studies of Co3O4 nano-particles

Cited by 11 publications

References 14 publications

Investigation of Nonmetal F‐doped Co₃O₄ as Catalyst for N₂O Catalytic Decomposition

Investigation of Nonmetal F‐doped Co₃O₄ as Catalyst for N₂O Catalytic Decomposition

Exploration of Optical, Structural, and Electrochemical Properties of MnO₂/Mn₂O₃ Nanocomposite as Anode Material for Energy Storage Applications

The role of citric acid for formation of nanocrystalline MnFe2O4 ferrite

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About

Structural, optical and Raman studies of Co3O4 nano-particles

Cited by 11 publications

References 14 publications

Investigation of Nonmetal F‐doped Co3O4 as Catalyst for N2O Catalytic Decomposition

Investigation of Nonmetal F‐doped Co3O4 as Catalyst for N2O Catalytic Decomposition

Exploration of Optical, Structural, and Electrochemical Properties of MnO2/Mn2O3 Nanocomposite as Anode Material for Energy Storage Applications

The role of citric acid for formation of nanocrystalline MnFe2O4 ferrite

Contact Info

Product

Resources

About

Investigation of Nonmetal F‐doped Co₃O₄ as Catalyst for N₂O Catalytic Decomposition

Investigation of Nonmetal F‐doped Co₃O₄ as Catalyst for N₂O Catalytic Decomposition

Exploration of Optical, Structural, and Electrochemical Properties of MnO₂/Mn₂O₃ Nanocomposite as Anode Material for Energy Storage Applications