摘要：AbstractThe green synthesis method is one of the most economic and ecofriendly approach for preparation of metal oxide nanoparticles. In the current study,Moringa oleiferaseed was used for synthesis of Ce2O3/M. oleifera(Ce2O3/MNCs) nano-composite. The bio-composite was characterized using FT-IR, XRD, SEM and HR-TEM. The FTIR analysis confirmed the phytochemical involvement in bio-composite. Its crystalline and size was well demonstrated through X-ray Diffraction and HR-TEM. The TEM images revealed these particles in circle shape with average size of 30 nm. The present investigation showed that Ce2O3/MNCs was toxic toB. alexandrinasnails with LC50of 314.5 mg/L. The survival and the reproductive rates of the snails were significantly reduced after exposing to ¼ and ½ of LC50of Ce2O3/MNCs. The present study showed that Ce2O3/MNCs has significant ovicidal and larvicidal activities. Also, the exposure to ½ of LC50of Ce2O3/MNCs showed alterations in the tegmental architectures of the head-foot region, in addition it caused significant damages in both of the hermaphrodite and digestive glands ofB. alexandrina. Conclusively, Ce2O3/MNCs nano-composite could be utilized as a new molluscicidal agent for the snails of schistosomiasis.
