SYNTHESIS OF CU-TIO2 COMPOSITE PHOTOCATALYTIC FILMS
DOI:
https://doi.org/10.35546/kntu2078-4481.2025.2.1.31Keywords:
methanesulfonate solution, composite coatings, titanium dioxide, copper, photocatalysis, structure, photodestruction, electrodepositionAbstract
Electrodeposition of composite coatings based on copper is considered a promising direction for the creation of modern multifunctional materials. One of the key areas of their use is the purification systems of gas emissions and wastewater.Organic pollutants, typical for the textile, food and paint industries, are effectively photodestructed with the participation of catalysts. Most often, semiconductor oxide materials, in particular titanium dioxide, are used as photocatalysts. The most promising area of application of composites containing TiO2 is the photocatalytic destruction of pollutants. Titanium dioxide is well known as an n-type semiconductor with a relatively high recombination rate of photoinduced charge carriers. The properties of titanium dioxide are a function of the crystal structure, size and morphology of nanoparticles.The design features of wastewater treatment equipment require the fixation of TiO2 particles in a rigid matrix. The optimal solution is the application of composite films by electrodeposition, for example, Cu–TiO2. The composition of the solution plays a decisive role in the formation of the properties of composites and the selection of technological parameters of the process. To obtain Cu–TiO2 composites, a methanesulfonate solution was used in the work, which is characterized by high solubility of salts and electrochemical indifference. It was found that the photocatalytic properties of Cu–TiO2 composite films obtained from a methanesulfonate solution depend on the amount of titanium dioxide included in the films.It was shown that an increase in the TiO2 content in the films from 0.1 to 1.3 wt.% is accompanied by an increase in the efficiency of photodestruction of the dye from 6 to 15.5 %. The proposed solution composition demonstrates high efficiency for the synthesis of composite films of photocatalysts intended for the purification of wastewater from organic pollutants.
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