磁铁矿滑石（FeO@滑石）纳米复合材料的制备与表征：一种用于Cr(VI)和茜素红S染料的有效吸附剂
Preparation and Characterization of Magnetite Talc (FeO@Talc) Nanocomposite as an Effective Adsorbent for Cr(VI) and Alizarin Red S Dye.
作者信息
Nayl AbdElAziz A, Abd-Elhamid Ahmed I, Ahmed Ismail M, Bräse Stefan
机构信息
Department of Chemistry, College of Science, Jouf University, Sakaka 72341, Al Jouf, Saudi Arabia.
Nanotechnology and Composite Materials Research Department, Advanced Technology and New Materials Research Institute (ATNMRI), City of Scientific Research and Technological Applications (SRTA-City), New Borg Al-Arab, Alexandria 21934, Egypt.
出版信息
Materials (Basel). 2022 May 9;15(9):3401. doi: 10.3390/ma15093401.
In this work, the adsorption of Cr(VI) ions and the organic dye Alizarin Red S (ARS) was investigated using magnetite talc (FeO@Talc) nanocomposite. Different characterization techniques such as scanning electron microscopy (SEM), Fourier transform infrared (FTIR) spectroscopy, X-ray Diffraction (XRD), and thermogravimetric analysis (TGA) were used to demonstrate the physical and chemical properties of the fabricated FeO@Talc nanocomposite. In addition, the adsorption isothermic, kinetic, and thermodynamic properties were illustrated. The results demonstrate that the investigated adsorption processes obeyed the Langmuir isotherm model for Cr(VI) and the Freundlich isotherm model for ARS dye, with a maximum adsorption capacity of 13.5 and 11.76 mg·g, respectively, controlled by pseudo second-order kinetics. Regeneration and reusability studies demonstrated that the prepared FeO@Talc nanocomposite is a promising and stable adsorbent with considerable reusability potential.
在本研究中，使用磁铁矿滑石（FeO@滑石）纳米复合材料研究了Cr(VI)离子和有机染料茜素红S（ARS）的吸附情况。采用扫描电子显微镜（SEM）、傅里叶变换红外（FTIR）光谱、X射线衍射（XRD）和热重分析（TGA）等不同表征技术来证明所制备的FeO@滑石纳米复合材料的物理和化学性质。此外，还阐述了吸附等温线、动力学和热力学性质。结果表明，所研究的吸附过程对Cr(VI)遵循朗缪尔等温线模型，对ARS染料遵循弗伦德里希等温线模型，最大吸附容量分别为13.5和11.76 mg·g，受伪二级动力学控制。再生和可重复使用性研究表明，所制备的FeO@滑石纳米复合材料是一种有前景且稳定的吸附剂，具有相当大的可重复使用潜力。
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