ABSTRACT

Bio-synthesis of cerium (IV) oxide nanoparticles (CeO₂-NPs) has been performed through a sol-gel method that involved the utilization of Rheum Turkestanicum plant extract as the stabilizing agent. The obtained nanoparticles have been identified throughout FT-IR, UV-Vis, XRD, FESEM/EDX/PSA, and TGA/DTA techniques. The XRD pattern has been presented the cubic fluorite structure of CeO₂-NPs, which had indicated the particle size about 30 nm. The UV-Vis spectrum of nanoparticles has presented a strong adsorption band. The FESEM/PSA images have exhibited the spherical shape of CeO₂-NPs. Furthermore, the photocatalytic activity of CeO₂-NPs has been investigated by performing the decolorization of MB, RhB, and MO dyes under UVA light, which are associated with sewage water pollutants. The results of MTT assay has reported that the cytotoxicity effect of CeO₂-NPs on PC12 cell lines had not been dependent on concentration, as well as an indication of the lack of any significant toxicity by the nanoparticles on cancer cells.

摘要

已经通过溶胶-凝胶法进行了 氧化铈 (IV) 纳米粒子 (CeO _{2 -NPs) 的生物合成，该方法涉及利用}土耳其大黄 植物提取物作为稳定剂。所获得的纳米粒子已通过 FT-IR、UV-Vis、XRD、FESEM/EDX/PSA 和 TGA/DTA 技术进行鉴定。XRD图谱呈现CeO ₂ -NPs的立方萤石结构，表明粒径约为30 nm。纳米粒子的紫外-可见光谱呈现出很强的吸附带。FESEM/PSA图像显示出CeO ₂ -NPs的球形。此外，CeO _{2的光催化活性}- 已通过在 UVA 光下对与污水污染物相关的 MB、RhB 和 MO 染料进行脱色来研究 NPs。MTT测定的结果表明，CeO ₂ -NPs对PC12细胞系的细胞毒性作用不依赖于浓度，并且表明纳米颗粒对癌细胞没有任何显着毒性。