ABSTRACT

Background: Nanoparticles are specialized particles that exhibit less predictable optical, chemical as well as physical properties, there is a constant change in its property as it reaches the atomic scale levels [1]. Methods: For the scope of this research, Cerium is doped with Al2O3 to create a Nanoparticle. The formed calcined samples were under analysis at separate temperature conditions [2] and various characterization techniques were carefully analyzed. The levels of temperature considered for the analysis scope were 200oC, 400oC and 600oC [3]. The concentration considered in Al2O3 for Cerium dopant was 20%. This was a practical study involving deployment of characterization techniques, i.e. P-XRD diffraction, UV visible, Fourier transformation IR technique, TEM/SEM techniques. With P-XRD spectroscopy, the resultant sample provided key insights on Al atom with doping of CeO2. The crystalline size (~30.95 nm) of the Nanoparticle using this technique was derived using Debye Scherer method [4]. Results: A clear observation during the analysis was revealed, according to which the Nanoparticle grain size was constantly reduced as temperature levels were elevated [5]. Deeper analysis revealed that an increased lattice strain on the calcined sample caused dislocation of the atom structure which resulted in realignment of bonding between Al2O3 atom and Ce atom [6]. The trend was confirmed by FTIR graphs where metal oxide material and moiety were present at relative positions in the synthesized samples. Similar conditions in the UV visible spectrum showed that a gradual increase in temperature levels increased wavelength, causing energy levels to drop, the phenomenon is known as a redshift pattern [7] where there is a constant change in insulating property to di-electric behavior for the Nanoparticle [8]. UV visible analysis also depicted an abrupt absorption peak in the spectrum at 200nm wavelength which confirmed formation of Nanoparticle. It was also observed that elevated levels of temperature caused rightward shift of the wavelength in optical band gap thereby showing a diminishing conducting property [9]. In the TEM analysis, a surface investigation [10] of Ce doped Al2O3 Nanoparticle in the calcined sample showed a uniform size and spherical shape of the Nanoparticle. Conclusion: Nanocomposite material was formed with P-XRD, FTIR, TEM, SEM and UV methods with a constant dopant concentration at different temperature levels and vice versa. Keywords: Nanoparticle composites, P-XRD, FTIR, TEM, UV, Nanostructure
Publication date: 01/06/2023

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https://doi.org/10.31032/IJBPAS/2023/12.6.1011