Abstract The main objective of this study is to investigate the structural features, magnetic behaviour, photocatalytic properties and blood compatibility of NiFe2O4 nanoparticles (NPs) obtained by subnanosecond laser ablation in water. Structure and size distribution of NPs were studied using X-Ray Diffractometry (XRD) and Transmission Electron Microscopy (TEM). The photocatalytic properties of NPs were evaluated by photo-degradation of Methylene Blue (MeB) dye under ambient visible light illumination. Four different kinetic models were used to identify the photocatalytic degradation mechanism of NiFe2O4 nanoparticles and it was found that the pseudo-second-order model was the most suitable type to interpret the experimental kinetic data of MeB photodegradation. The hemocompatibility of NiFe2O4 nanoparticles was studied by hemolysis tests using human erythrocytes drawn from healthy volunteers. NiFe2O4 nanoparticles caused undesirable hemolysis ratios at 0.05, 1 and 5 mg/ml concentrations, while the biologically safe concentration of these nanoparticles was found to be below 0.01 mg/ml.

中文翻译：

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激光烧蚀技术制备的镍纳米铁氧体在蒸馏水中的结构、磁性、光催化和血液相容性研究

摘要 本研究的主要目的是研究通过亚纳秒激光在水中烧蚀获得的 NiFe2O4 纳米粒子 (NPs) 的结构特征、磁行为、光催化性能和血液相容性。使用 X 射线衍射仪 (XRD) 和透射电子显微镜 (TEM) 研究了 NPs 的结构和尺寸分布。通过在环境可见光照射下亚甲基蓝 (MeB) 染料的光降解来评估 NPs 的光催化性能。四种不同的动力学模型被用来识别 NiFe2O4 纳米粒子的光催化降解机制，发现伪二级模型是最适合解释 MeB 光降解实验动力学数据的类型。NiFe2O4 纳米颗粒的血液相容性通过溶血试验使用从健康志愿者中抽取的人红细胞进行研究。NiFe2O4 纳米颗粒在 0.05、1 和 5 毫克/毫升浓度下会导致不希望的溶血率，而这些纳米颗粒的生物安全浓度低于 0.01 毫克/毫升。