Photocatalytic oxidative desulfurization has attracted much attention in recent years due to the continuous tightening of the sulfur content requirements in motor fuels and the disadvantages of the industrial hydrodesulfurization process. This work is devoted to the investigation of the photocatalytic activity of Bi₂W_xMo_1−xO₆ solid solutions (x = 1, 0.75, 0.5, 0.25, 0) in the oxidative desulfurization of hydrocarbons under visible light irradiation using hydrogen peroxide as an oxidant. The synthesized photocatalysts were characterized in detail using XRD, SEM, EDS, low-temperature nitrogen adsorption–desorption, and DRS. It was shown that the use of solid solutions Bi₂W_xMo_1−xO₆ with x = 0.5–0.75 leads to the complete oxidation of organosulfur compounds to CO₂ and H₂O within 120 min. The high photocatalytic activity of solid solutions (x = 0.5–0.75) is attributed to their ability to absorb more visible light, the presence of the corner-shared [Mo/WO₆] octahedral layers, which may promote the generation and separation of photogenerated charges, and the hierarchical 3D flower-like structure. The reaction mechanism of the desulfurization was also analyzed in this work.

This article presents new composite materials with cross-linked structures based on grafted copolymers of collagen with acrylates, which were prepared under photocatalytic conditions using the complex oxide RbTe_1.5W_0.5O₆ and additional modifiers. Cross-linking agents for acrylate fragments were used. Triethylene glycol dimethacrylate (TEDMA) was used in small volumes, and acrylic acid (AA) was used in an amount similar to the MMA concentration. The properties of the obtained graft copolymers were studied. Thus, collagen containing acrylate graft copolymers with cross-linked structures, which are highly soluble in water, was obtained. Addition of the protein substrate modifier (polyethylene glycol (PEG)) in an amount comparable to collagen resulted in a coagulate with a cross-linked structure. The gel easily released water during drying in vacuum and formed a polymer composite film. According to the results, the new polymer materials which were obtained were fungi-resistant. Due to observed properties, the obtained polymer samples could be considered as new materials for medical products, including colloidal solutions, gels, films.