Synthesis of CoFe2O4/MWCNTs Nanohybrid and its Effect on the Optical, Thermal, and Conductivity of PVA/CMC Composite as an Application in Electrochemical Devices

The sonochemical approach was used to synthesize of the CoFe2O4/MWCNTs nano-hybrid. The structural characteristics are examined using XRD and TEM techniques. TEM indicated the production of cubic and spherical forms with the average size 12.7 nm of the CoFe2O4 nanoparticles. The casting approach is used to create polymer nanocomposite samples based on CMC/PVA (80%CMC/20% PVA) doped with various concentrations of CoFe2O4/MWCNTs. various techniques are used to investigate the generated films' optical, thermal, electrical, and dielectric characteristics. The films' optical characteristics are investigated using the UV-Vis spectra. The energy gap of nanocomposite films decreased with the CoFe2O4/MWCNTs concentration increase in the polymer blend, which decreased from 5.32 to 3.97 eV for the direct transition and decreased from 4.89 to 3.58 eV for the indirect transition. The TGA show the thermal degradation temperature of the nanocomposite films with an increase of the concentration of CoFe2O4/MWCNTs. The thermal stability of the nanocomposite films enhanced whereas the melting point increased from 297 to 323 degrees C. At an ambient temperature, the dielectric relaxation and AC electrical properties of nanocomposite polymeric films in the frequency range 0.1 Hz to 20 MHz were described. The findings showed the increase of the nanocomposites' dielectric performance and electrical characteristics with increasing the nanohybrid concentration of CoFe2O4/MWCNTs. The electrical relaxation dynamics in the presence of dielectric were investigated. The electric modulus was used to explore the dielectric characteristics. According to the results of this study, these samples can be used in electrochemical devices such as conductive sensors, super-capacitors and nanoelectronic devices.

Automated summary

In this study, the sonochemical approach was used to synthesize the CoFe2O4/MWCNTs nano-hybrid. The structural characteristics were examined using XRD and TEM techniques. The results showed that the nanocomposite films exhibited enhanced optical, thermal, electrical, and dielectric characteristics. The nanoparticles could potentially be used in electrochemical devices such as conductive sensors, supercapacitors, and nanoelectronic devices.