Thermal, structural, functional, optical and magnetic studies of pure and Ba doped CdO nanoparticles

• Kinetic parameters were evaluated from TG–DTA.
• Various functional groups and formation of NPs were identified by FT-IR.
• Optical band gap identified from UV–Vis–DRS.
• Morphology and chemical compositions were confirmed from SEM, TEM and EDX.

In this research, a chemical precipitation method was used to synthesize undoped and doped cadmium oxide nanoparticles and studied by TG–DTA, XRD, FT-IR, SEM, with EDX and antibacterial activities, respectively. The melting points, thermal stability and the kinetic parameters like entropy (ΔSΔS), enthalpy (ΔHΔH), Gibb’s energy (ΔGΔG), activation energy (E), frequency factor (A) were evaluated from TG–DTA measurements. X-ray diffraction analysis (XRD) brought out the information about the synthesized products exist in spherical in shape with cubic structure. The functional groups and band area of the samples were established by Fourier transform infrared (FT-IR) spectroscopy. The direct and indirect band gap energy of pure and doped samples were determined by UV–Vis–DRS. The surface morphological, elemental compositions and particles sizes were evaluated by scanning electron microscopy (SEM) and energy dispersive X-ray spectroscopy (EDS). Finally, antibacterial activities indicated the Gram-positive and Gram-negative bacteria are more active in transporter, dehydrogenize and periplasmic enzymatic activities of pure and doped samples.

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