Nasiri Alireza, Tamaddon Fatemeh, Mosslemin Mohammad Hossein, Faraji Maryam
Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran.
Department of Chemistry, Islamic Azad University, Yazd Branch, Yazd, Iran.
MethodsX. 2019 Jun 26;6:1557-1563. doi: 10.1016/j.mex.2019.06.017. eCollection 2019.
In this research, magnetically separable nanoCoFeO@methyl cellulose (MC) as a novel metal-organic framework was designed by a facile, fast, and new microwave-assisted method and then characterized. To assay the photocatalytic activity of nanoCoFeO@MC, its ability in metronidazole (MNZ) removal was investigated by considering the effect of some variables such as initial MNZ concentrations (5-20 mg/L), pH (3-11), nanophotocatalyst loading (0.0-0.4 g), and reaction time (15-120 min). The kinetic performance of the process was assessed by the first order and - models. The concentration of MNZ was determined by high performance liquid chromatography. The optimal conditions for the maximum MNZ removal efficiency (85.3%) included pH of 11, MNZ concentration of 5 mg/L, photocatalyst loading of 0.2 g, and irradiation time of 120 min. Moreover, the reusability and chemical stability of nanoCoFeO@MC were studied. MNZ was successfully degraded at a rate of 77.58% in the fourth run. •A facile, fast, and new microwave-assisted method was developed to synthesize nanoCoFeO@MC as a new nanobiomagnetic photocatalyst.•Pure-phase spinel ferrites, spherical particle morphology with smaller agglomeration, and ferromagnetic nature of nanoCoFeO@MC were confirmed.•NanoCoFeO@MC displayed a significant photocatalytic activity in the photocatalytic degradation of MNZ; moreover, it was easily separated by a magnet and exhibited good chemical stability.
在本研究中，通过一种简便、快速的新型微波辅助方法设计并表征了磁性可分离的纳米CoFeO@甲基纤维素（MC），这是一种新型金属有机框架。为了测定纳米CoFeO@MC的光催化活性，通过考虑一些变量的影响，如甲硝唑（MNZ）初始浓度（5 - 20mg/L）、pH值（3 - 11）、纳米光催化剂负载量（0.0 - 0.4g）和反应时间（15 - 120分钟），研究了其去除MNZ的能力。通过一级模型和 - 模型评估了该过程的动力学性能。MNZ的浓度通过高效液相色谱法测定。去除MNZ效率最高（85.3%）的最佳条件包括pH值为11、MNZ浓度为5mg/L、光催化剂负载量为0.2g以及照射时间为120分钟。此外，还研究了纳米CoFeO@MC的可重复使用性和化学稳定性。在第四次运行中，MNZ成功降解率达到77.58%。
•开发了一种简便、快速的新型微波辅助方法来合成纳米CoFeO@MC作为一种新型纳米生物磁性光催化剂。
•证实了纳米CoFeO@MC为纯相尖晶石铁氧体，具有球形颗粒形态且团聚较小，以及铁磁性质。
•纳米CoFeO@MC在MNZ的光催化降解中表现出显著的光催化活性；此外，它易于通过磁铁分离并表现出良好的化学稳定性。
