A facile thermal-treatment route to synthesize the semiconductor CdO nanoparticles and effect of calcination

Abstract

In this research, a thermal treatment method was used to synthesize cadmium oxide nanoparticles. The metal precursor, cadmium nitrate and a capping agent were dissolved in deionized water, which later was dried and crushed into powder. The powder underwent calcination treatment of 500, 550, 600, and 650 °C to crystallize the nanoparticles and to remove organic compounds. The structural studies of CdO nanoparticles have been carried out using EDAX, FTIR, XRD, SEM and TEM. The FTIR and XRD spectra showed that the crystalline structure formation of metal oxide nanoparticles has only occurred after been exposed to calcination. The optical properties which were determined using a UV-vis spectrophotometer showed a decrease in the band gap with increasing calcination temperature. These results prove that the thermal treatment method is a simple technique that can produce pure metal oxide nanoparticles with no other chemicals added.

Calcined Solution-Based PVP Influence on ZnO Semiconductor Nanoparticle Properties

“…There are practically endless potential applications of these nanomaterials as a result of the unique outcomes created by the quantum confinement effect and greater ratio between surface area and volume [5][6][7][8][9][10][11][12]. Different nanoparticles being created inside a polymer matrix have become synergistically combined, and a polymer matrix is used to house the development of nanoparticles [13][14][15][16].…”

Structural, morphological and optical behaviour of PVP capped binary (ZnO)0.4 (CdO)0.6 nanoparticles synthesised by a facile thermal route

“…A smaller peak appeared at 305°C, and this was assumed to be caused by breakdown of NOx compounds [108]. In the final stage, most of the PVP content had been decomposed in the sample, and the maximum weight loss appeared at a temperature of 434°C [109]. This change in weight loss with temperature became negligible at 492°C since the transformation of the reminder of the PVP content into carbonaceous products was complete [110], after 492°C, no further weight loss was observed, since the elimination of carbonaceous matter from the sample had occurred between 434 and 492°C [30].…”

“…The (ZnO) 0.4 (CdO) 0.6 nanoparticles were shown to be of spherical shape at all calcination temperatures tested, and homogeneous particles with no crystal entanglement were confirmed to be present by TEM images of the synthesised (ZnO) 0.4 (CdO) 0.6 nanoparticles. It can therefore be said that this thermal treatment technique has succeeded in producing uniform binary oxide nanoparticles, with the presence of PVP acting as a restraining influence on the particle size through the suppression of agglomeration [109]. .03]% respectively.…”

Down-top nanofabrication of binary (CdO)_x&nbsp;<br />(ZnO)_1-x&nbsp;nanoparticles and their antibacterial activity

“…11 Although clear electrodes, diodes, gas sensors, and antibacterial activity, for example, are other potential physical applications, these materials have widely been used to meet desirable requirements. [12][13][14][15] There have been several CdO nanostructures forms created at a variety of nanoscales for several purposes and applications, eg, nanoclusters, 16 nanowires and nanotubes, [17][18][19] nanoparticles (NPs), 20,21 nanocrystals, 22 nanorodes, 23 and many more exotic structures, eg, CdO-like nanoflower 24 and CdO nanoflake arrays, 25 among others. 26,27 Similarly, hexagonal ZnO is a II-VI composite semiconductor made of the metallic element zinc (II) and the non-metallic element oxygen (VI).…”