In the present work the degradation of the blue dye, Navy H-2G cibacron was evaluated experimentally through the photocatalytic action of TiO2 industrial nanoparticles of the Spanish company Avanzare. The nanoparticles correspond to the anatase phase characterized by DR-X, have an approximate size of 26.6 nm measured with TEM and 20.4 nm measured with DLS. The photocatalytic degradation was evaluated as a function of various masses of the photocatalyst from 0.1g to 1.0g; Depending on the concentration of the dye from 20 ppm to 100 ppm; And depending on the pH from 2 to 10.5. The time of photocatalytic degradation of the dye was monitored by UV-Visible spectrophotometry. The optimal results of the process were observed with a mass of 0.6 g of nanoparticles of TiO2 , concentration of dye of 20 ppm and at a pH of 4.

In the present work the simulation of the plasmonic behavior of gold nanospheres with diameters of 10, 20, 30, 40, 50 y 60 nm in aqueous medium against light with wavelenghts ranging from 400 to 650 nm was done. A greater contribution of the scattering to the extinction spectrum was observed as a function of the size of the nanosphere, which exhibited an exponential behavior.

The purpose of this study was to determine the size of zinc oxide nanoparticles (NPs-ZnO) synthesized by the chemical precipitation method from the precipitation reaction between zinc acetate and sodium hydroxide. Then, characterization was made by X-ray diffraction (XRD). The characterization results obtained by this instrumental method correspond to the zincite structure (ZnO) of the hexagonal system, whose crystalline structural data is registered in the ICDD file PDF 01-075-0576. The determination of the size of NPs-ZnO was performed using the Scherrer equation with data obtained from the diffraction data of the most important planes of the crystal structure of the synthesized nanoparticles. The size of the crystallites determined was approximately 21 nm. This method of determining the size of nanoparticles is not very exact, however, in laboratories that do not have electron microsc...