Synthesis and characterization of cobalt nickel oxide (CoNi2O4) prepared by one step hydrothermal method

Anupama, B.; Raguram, T.; Rajni, K S

doi:10.1016/j.matpr.2022.05.402

Cited by 5 publications

(2 citation statements)

References 52 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…In recent years, various synthesis methods such as facile solvothermal route [17], chemical spray pyrolysis [18,19], chemical vapour deposition [20,21], sol-gel [22], hydrothermal [23,24], and simple precipitation [25].…”

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Co₃O₄ spinel nanowall: understanding the growth mechanism and properties

Barala,

Panda,

Gangopadhyay

2024

Phys. Scr.

View full text Add to dashboard Cite

Formation of spinel tricobalt tetraoxide (Co3O4) nanostructures through a controlled thermal oxidation process is discussed here. Thin films of high purity cobalt (Co) were deposited on glass/quartz substrates using an electron beam (E-beam) evaporation technique. Thermal oxidation of the as-deposited Co thin films was carried out at various oxidation temperatures (400°C to 600°C) for different durations (5 hours to 15 hours) to grow various oxide nanostructures. Different surface characterizations techniques were used to investigate the structure, chemistry and electronic properties of the as-grown cobalt oxide nanostructures. X-ray diffraction analysis revealed the presence of the CoO phase along with the Co3O4 phases at relatively lower oxidation temperature. However, the Co3O4 phase becomes more predominant for longer oxidation durations at higher oxidation temperatures. Field emission scanning electron microscopy analysis showed a surface morphological transition from nanowalls to nanograins with an increase in the oxidation temperature. The surface electrical conductivity of the oxidized Co films is also increased for higher oxidation temperature and/or duration mainly due to the oxide phase purity and larger particle sizes. Ultraviolet–visible spectroscopy indicated two distinct optical energy bandgaps, which effectively decreased with an increase in the oxidation temperature and duration. Raman spectroscopy identified five different Raman-active modes corresponding to the Co3O4 phase, with the F2g mode dominating at higher temperatures. All these findings provide clear insights into the structural, electrical, chemical and optical properties of cobalt oxide thin films. Moreover, it provides a mechanism on how to grow 2D nanowalls morphology of Co3O4 films which can further be used in energy, sensor or catalytic applications.

show abstract

Section: Introductionmentioning

confidence: 99%

Synthesis and characterization of Co₃O₄ spinel nanowall: understanding the growth mechanism and properties

Barala,

Panda,

Gangopadhyay

2024

Phys. Scr.

View full text Add to dashboard Cite

show abstract

“…Finally, the obtained MCM-41/CoNiO 2 composite was used for further electrochemical sensor studies. 35 Construction of the GCE/MCM-41/CoNiO 2 electrode.-For practical applications, the GCE was first cleaned with 0.05 μm alumina slurry and sonicated for 5 min after that washed with DI water and ethanol. Further, CoNiO 2 (2.0 mg) was added to the MCM-41, which was sonicated to form an MCM-41/CoNiO 2 composite.…”

mentioning

confidence: 99%

Electrochemical Detection of Metol through the Cobalt Nickel Oxide Nanosheets Incorporated with MCM-41 Nanospheres Composites Modified Glassy Carbon Electrode

Mariappan,

Sakthinathan,

Chen

et al. 2023

J. Electrochem. Soc.

View full text Add to dashboard Cite

In this study, contaminations of metol (or Elon) in environmental water and industrial wastewater are the major causes of toxicity, which is very harmful to human health and other living things. Hence the determination of metol in high demand is more important. Further, the Mobil Composition of Matter (MCM-41) mesoporous silica nanoparticles incorporated with cobalt nickel oxide (CoNiO2) complex to form MCM-41/CoNiO2 composite modifying the glassy carbon electrode (GCE) used for metol detection. The MCM-41/CoNiO2 composite coated on the GCE surface exhibited fast electron transfer kinetics, improved conductivity, a large surface area, active stability, and improved catalytic efficiency. The structural morphology of the MCM-41/CoNiO2 composite was investigated using several spectroscopic and microscopic techniques. Here, the MCM-41/CoNiO2 composite was verified using different characterization studies such as Field Emission Scanning Electron Microscopy, Transmission Electron Microscopy, Energy Dispersive X-ray Analysis, X-ray Diffraction Analysis, and X-ray Photoelectron Spectroscopy. Additionally, the electrochemical investigations have included Electrochemical Impedance Spectroscopy, Cyclic Voltammetry, and Differential Pulse Voltammetry studies. The GCE/MCM-41/CoNiO2 electrode shows a low detection limit of 10 nM and the LOQ value is 0.1 μM with a broad linear response range of 0.1–750 μM, and greater sensitivity of 0.411 μA μM−1 cm−2 under optimal voltammetry.

show abstract

Synthesis of CoNi2O4/ZnSe nanocomposite for environmental cleaning under visible light irradiation

Abdullah,

Abbas Shah,

Manzoor

et al. 2024

Ceramics International

View full text Add to dashboard Cite

Synthesis and characterization of cobalt nickel oxide (CoNi2O4) prepared by one step hydrothermal method

Cited by 5 publications

References 52 publications

Synthesis and characterization of Co₃O₄ spinel nanowall: understanding the growth mechanism and properties

Synthesis and characterization of Co₃O₄ spinel nanowall: understanding the growth mechanism and properties

Electrochemical Detection of Metol through the Cobalt Nickel Oxide Nanosheets Incorporated with MCM-41 Nanospheres Composites Modified Glassy Carbon Electrode

Synthesis of CoNi2O4/ZnSe nanocomposite for environmental cleaning under visible light irradiation

Contact Info

Product

Resources

About

Synthesis and characterization of cobalt nickel oxide (CoNi2O4) prepared by one step hydrothermal method

Cited by 5 publications

References 52 publications

Synthesis and characterization of Co3O4 spinel nanowall: understanding the growth mechanism and properties

Synthesis and characterization of Co3O4 spinel nanowall: understanding the growth mechanism and properties

Electrochemical Detection of Metol through the Cobalt Nickel Oxide Nanosheets Incorporated with MCM-41 Nanospheres Composites Modified Glassy Carbon Electrode

Synthesis of CoNi2O4/ZnSe nanocomposite for environmental cleaning under visible light irradiation

Contact Info

Product

Resources

About

Synthesis and characterization of Co₃O₄ spinel nanowall: understanding the growth mechanism and properties

Synthesis and characterization of Co₃O₄ spinel nanowall: understanding the growth mechanism and properties