zinc oxide

Melamine formaldehyde oligomers with peroxy groups (MFOP) have been synthesized based on melamine or urea and melamine in the presence of tert-butyl peroxymethanol or tert-butyl hydroperoxide. Zinc oxide was used as a catalyst. The effect of peroxide nature, ratio of the starting components and process time on the characteristics and yield of MFOP has been studied. The structure of the synthesized MFOP was confirmed by IR- and PMR-spectroscopy. The chemistry of the cross-linked structures formation was studied.

The possibility of synthesis in the presence of tert-butyl peroxymethanol (TBPM) or tert-butyl hydroperoxide (TBHP) of urea-formaldehyde oligomers with peroxide groups (UFOP) has been considered. Zinc oxide was used as the reaction catalyst. The effect of the initial components ratio, the reaction temperature and the process time on the characteristics and yield of the obtained oligomers was studied. Methods for obtaining UFOP using a mixture of TBPM and TBHP as a component are proposed. The structure of the synthesized UFOP was confirmed by IR- and NMR-spectroscopic studies.

The effect of zinc-molybdenum system ZnO-MoO3 (Zn:Mo = 15:85, 25:75, 50:50, 75:25) ultrasonic treatment (UST) on its physical-chemical properties was studied. With the help of XRD, FT-IR and DTA methods it was shown that such treatment forms molybdenum suboxides (Magnelli phases of Мо4О11 and Мо8О23 composition) and zinc molybdates (α-ZnMoO4, ZnMo8O10). Specific character of reagents ratio on the formation of these compounds was determined.

ZnO porous films were successfully anodized on pure Zn sheet via electrochemical anodization in the glycerol base electrolyte containing ammonium fluoride salt as a pore enhancing agent. The structural and morphological properties of anodized and annealed films were characterized by X-ray diffraction and scanning electron microscopy, respectively. This shows the formation and growth of ZnO porous structure.