Abstarct: In recent years, polysiloxanes have been used as a substrate for catalytic reactions because they have high stability, strength and biocompatibility. In this research, polysiloxane was prepared from propylaminetriethoxysilane and methyltrimethoxysilane as precursors by sol-gel method and then titanium isopropoxide was grafted on it in dry conditions. Then, the titanium alkoxide was hydrolyzed in different conditions such as hydrothermal, conventional and room moisture hydrolysis. Then, the synthesized catalysts were characterized by using FT-IR, XRD and FE-SEM analyses.finally، The prepared composites were used in the photocatalytic degradation of Rhodamine-B aqueous solution under visible light irradiation. baxsed on the obtained results, the catalyst prepared under conventional hydrolysis conditions showed the highest activity of 71% degradation of 5 ppm Rrhodamine-B solution during 210 minutes.