Obtaining of ZnO Nanoparticles Decorated with Bi_2O_3 and NiO by Modified Sol-Gel Technique

摘要

The modified sol-gel technique was proposed to obtain ZnO nanoparticles with the sizes of 30-70 nm. The proposed method allows obtaining ultradispersed powdery composites with high chemical homogeneity, which are highly demanded raw products for the development of new functional materials of a wide destination range. Metal nitrates were used as the metal sources, and hexamethylenetetramine and monoethanolamine were used to sol stabilization. Acetylacetone was used as com-plexing agent to obtain ultradispersed ZnO powders. The obtained powders were characterized by use XRD, TEM, N2 adsorption-desorption, FTIR spectroscopy, and element analysis. According to the results, it can be observed that Bi_2O_3 or/ and NiO with particle sizes of <5 and 8-20 nm, respectively, are dispersed uniformly on the surface of ZnO nanoparticles with sizes of 50-70 nm. The chemical nature of the decoration was confirmed by the presence of characteristic bands in the FTIR spectra, indicated the chemical interaction between all structural elements of compositions.