The influence of polyvinylpyrrolidone on the structure and optical properties of ZnO–MgO nanocomposites synthesized by the polymer–salt method

The influence of polyvinylpyrrolidone on the structure and optical properties of ZnO–MgO nanocomposites synthesized by the polymer–salt method is studied. The synthesized nanocomposites are studied by the methods of optical and luminescence spectroscopy and X-ray diffraction analysis. An increase in the polyvinylpyrrolidone concentration in solutions leads to a decrease in the size of forming ZnO crystals, an increase in the luminescence intensity of ZnO–MgO nanocomposites in the blue spectral region, and quenching of luminescence at longer wavelengths. The efficiency of singlet oxygen photogeneration by ZnO–MgO nanocomposites obtained by the polymer–salt method increases with increasing concentration of polyvinylpyrrolidone in initial solutions.