The effect of the carbon material content on the electrophysical and optical properties of NiMoO₄/C composites

Abstract

The aim of the work is to establish the dependences of the electrophysical and optical characteristics of NiMoO₄/C composites from the content of carbon material. Experimental data and their analysis by Raman and impedance spectroscopy were used to achieve these goals. As a result of studies the numerical values of electrical conductivity at direct current and activation energy of the materials under study have been determined. The shift of the maximum G-band of composites to the high-frequency region in Raman spectra testifies to the formation of interfacial covalent bonds between NiMoO₄ and carbon material in the process of hydrothermal synthesis.

Keywords:

• Carbon material
• composite
• electrical conductivity
• nickel molybdate
• Raman spectroscopy

Additional information

Funding

This work was supported by the National Research Foundations of Ukraine [Project No.2020.02/0043].