In this study, we report a synthesis of new nanocomposites, wherein TiO₂ is introduced into multicharged polymeric matrix and covered with noble metals (Pt, Pd or Au) for the photocatalytic application. A photocatalytic activity investigation was performed by studying the degradation of methylene blue. It revealed that all obtained nanocomposites demonstrate enhanced photocatalytic ability when compared to pure TiO₂, under both UV (24 °C) and solar light (−2 °C). The morphology and catalytic properties of the composites depend on the noble metals. The kinetic speed value of photodegradation was found to increase in the following sequence: TiO₂ < TiO₂-NPst ≈ Pd-TiO₂@NPSt < Pt-TiO₂@NPSt ≈ Au-TiO₂@NPSt.