STUDY OF THE EFFECT OF PRECURSORS ON THE STRUCTURAL CHARACTERISTICS OF SYNTHETIZED ZnO NANOPARTICLES

Abstract

In this work, zinc oxide (ZnO) nanoparticles were obtained by direct precipitation method in aqueous solution using two different precursors — zinc acetate dihydrate and zinc chloride — under the same synthesis conditions. The effect of the selected precursors on the structural parameters of each synthesized sample was evaluated using X-ray diffraction (XRD) analysis. The results of the analysis demonstrate the synthesized ZnO phase with a hexagonal wurtzite structure and the average crystallite size of 28 nm for both studied samples. Based on the XRD data, the interplanar spacing, crystallite size, dislocation density, and micro strain were determined for different crystallographic planes. Analysis of the obtained values shows slight differences in the formed crystalline materials depending on the used precursor. The calculated structural parameters of the synthesized ZnO nanoparticles are in good agreement with the standard reported data (JCPDS 36-1451). The effect of selected precursors on the lattice constants, unit cell volume, Zn–O bond length, and crystallinity of synthesized ZnO samples was studied. It was established that the sample obtained from the zinc acetate dihydrate precursor is characterized by the absence of impurities and higher crystallinity (93%) compared to the sample synthesized from zinc chloride, the crystallinity of which is 86%. The results are of practical value for simple synthesis of nano dispersed forms of ZnO and its possible application in textile finishing.

Effect of ZnO nanoparticles synthesized by the improved method on the antibacterial properties of cotton textile materials

“…For comparison, in [16] the characteristics of the crystalline structure of ZnO nanoparticles synthesized from Zn(NO 3 ) 2 •4H 2 O by a similar method of direct deposition at different temperatures (60 °С, 80 °С, 100 °С) for 2 h are given, and it is shown that that the smallest crystallite size of 44 nm is formed at 80 °C with calcination at 500 °C for 5 h. The advantages of the synthesis method proposed in this paper are the possibility to obtain nanoparticles of smaller size at lower temperatures in a shorter time. This can be explained by the effect of the selected precursor Zn(CH 3 COO) 2 •2H 2 O on the parameters of the formed crystal structure, which confirms the results of study [14].…”

“…The results of X-ray diffraction analysis (Fig. 1) show that ZnO nanoparticles are formed in a hexagonal wurtzite structure with an average crystallite size of 28 nm [14]. The calculated structural parameters of the synthesized ZnO nanoparticles are in good agreement with the standard data (JCPDS 36-1451).…”

“…In a previously conducted study [14], the crystalline phase and structural parameters of ZnO nanoparticles synthesized by the proposed deposition method were determined. The powder X-ray pattern of the obtained ZnO sample (Fig.…”

“…1) with the standard (JCPDS 36-1451) shows that for the studied sample, the displacements of the positions of the diffraction Based on the obtained X-ray structural analysis data (Fig. 1), the average size of the crystallites of the synthesized ZnO sample was calculated using the Scherrer method, which is 28 nm [14]. The obtained value can be considered as a lower limit of the size of nanoparticles since the particles are often agglomerations of a large number of crystallites.…”

“…Thus, it was established that the proposed method of synthesis by carrying out precipitation reactions at a temperature of 70 °C for 2 h followed by roasting the dried powder at 300 °C for 2 h allows obtaining ZnO nanoparticles with an average crystallite size of 28 nm [14]. For comparison, in [16] the characteristics of the crystalline structure of ZnO nanoparticles synthesized from Zn(NO 3 ) 2 •4H 2 O by a similar method of direct deposition at different temperatures (60 °С, 80 °С, 100 °С) for 2 h are given, and it is shown that that the smallest crystallite size of 44 nm is formed at 80 °C with calcination at 500 °C for 5 h. The advantages of the synthesis method proposed in this paper are the possibility to obtain nanoparticles of smaller size at lower temperatures in a shorter time.…”