Titanium dioxide (TiO₂) and TiO₂ – graphene oxide (GO) composite layers were deposited by spin coating technique onto SiO₂ quartz substrates. TiO₂ NPs and GO platelets were used as base materials for the preparation of the starting water/acetone dispersions. Polystyrene (PS) buffer layers were deposited by drop-cast method onto the substrates surface to ensure the adherence of the pure TiO₂/PS and TiO₂-GO/PS composite layer. The surface morphology and physico-chemical properties of the layers have been determined and correlated with their photocatalytic properties. It was found that GO oxygen functional groups are reduced by the presence of TiO₂ NPs in the composite materials. Photodegradation activity under UV–visible light irradiation was studied by measuring the concentration changes in time of organic methylene blue dye in aqueous solutions as well as the chemical oxygen demand for real wastewater samples. The obtained results revealed that the photocatalytic properties of the spin coated composites are determined by the graphene oxide concentration. The effect of the spontaneous reduction of GO in the presence of TiO₂ NPs on the photocatalytic activity of the TiO₂-GO/PS composites is discussed in detail.

通过旋涂技术将二氧化钛（TiO ₂）和TiO _2-氧化石墨烯（GO）复合层沉积在SiO ₂石英基板上。TiO ₂ NP和GO血小板用作制备起始水/丙酮分散体的基础材料。通过滴铸法将聚苯乙烯（PS）缓冲层沉积到基材表面上，以确保纯TiO ₂ / PS和TiO ₂ -GO / PS复合层的粘附。已经确定了这些层的表面形态和物理化学性质，并将其与它们的光催化性质相关联。发现通过TiO ₂的存在，GO的氧官能团被还原了。复合材料中的NP。通过测量水溶液中有机亚甲基蓝染料随时间的浓度变化以及实际废水样品中的化学需氧量，研究了UV-可见光照射下的光降解活性。所得结果表明，旋涂的复合材料的光催化性能取决于氧化石墨烯的浓度。讨论了在TiO ₂ NPs存在下GO自发还原对TiO ₂ -GO / PS复合材料光催化活性的影响。