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The present study concluded the synthesis of titanium dioxide (TiO2) nanoparticles using titanium tetra-isopropoxide(TTIP) as titanium source. Citrullus Colocynthis (CcExt-TiO2NPs) and Ricinus Communis (RcExt-TiO2NPs) as leaves extracts X-ray diffraction (XRD), Fourier transform infrared (FTIR), scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and ultraviolet-visible spectroscopy (UV-VIS) were used to classify the samples. The results of the FT-IR study terpenoids, flavonoids, and proteins were found to be associated in the formation and stability of titanium nanoparticles. The result have been show that the XRD (CcExt-TiO2NPs) and (RcExt-TiO2NPs), In nature, they were found to be crystalline, with a mixture of rutile and anatase types. SEM showed that (CcExt-TiO2NPs) and (RcExt-TiO2NPs) were spherical in shape and the size ranger from 15 to 32 and 20 to 25 nm respectively. EDX image confirms the presence of titanium and Oxygen element in sample, The results indicated that the photocatalytic activity of the titanium dioxide TiO2 nanoparticles that the breakdown of the dye Congo Red (CR) was verified by lowering of the absorbance and the degradation in presence of (CcExt-TiO2NPs) was more than in presence of (RcExt-TiO2NPs).