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用于去除锑的FeO/GO纳米复合材料的合成、表征及吸附性能

Synthesis, Characterization, and Adsorptive Properties of FeO/GO Nanocomposites for Antimony Removal.

作者信息

Yang Xiuzhen, Zhou Tengzhi, Ren Bozhi, Shi Zhou, Hursthouse Andrew

机构信息

College of Civil Engineering, Hunan University of Science and Technology, Xiangtan 411201, China.

College of Civil Engineering, Hunan University, Changsha 410082, China.

出版信息

J Anal Methods Chem. 2017;2017:3012364. doi: 10.1155/2017/3012364. Epub 2017 Jul 20.

DOI:10.1155/2017/3012364
PMID:28808598
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC5541814/
Abstract

A magnetic FeO/GO composite with potential for rapid solid-liquid separation through a magnetic field was synthesized using GO (graphene oxide) and FeO (ferriferous oxide). Characterization of FeO/GO used scanning electron microscope (SEM), X-ray diffractometer (XRD), Fourier transform infrared spectrometer (FT-IR), and Vibrating Sample Magnetometer (VSM). A number of factors such as pH and coexisting ions on adsorbent dose were tested in a series of batch experiments. The results showed that GO and FeO are strongly integrated. For pH values in the range of 3.0~9.0, the removal efficiency of Sb(III) using the synthesized FeO/GO remained high (95%). The adsorption showed good fit to a pseudo-second-order and Langmiur model, with the maximum adsorption capacity of 9.59 mg/g maintained across pH 3.0-9.0. Thermodynamic parameters revealed that the adsorption process was spontaneous and endothermic. Analysis by X-ray photoelectron spectroscopy (XPS) showed that the adsorption process is accompanied by a redox reaction.

摘要

采用氧化石墨烯（GO）和氧化亚铁（FeO）合成了一种具有通过磁场实现快速固液分离潜力的磁性FeO/GO复合材料。使用扫描电子显微镜（SEM）、X射线衍射仪（XRD）、傅里叶变换红外光谱仪（FT-IR）和振动样品磁强计（VSM）对FeO/GO进行了表征。在一系列批量实验中测试了诸如pH值和共存离子等多种因素对吸附剂用量的影响。结果表明，GO和FeO紧密结合。对于3.0至9.0范围内的pH值，使用合成的FeO/GO对Sb(III)的去除效率保持较高（95%）。吸附符合准二级动力学和朗缪尔模型，在pH 3.0 - 9.0范围内最大吸附容量维持在9.59 mg/g。热力学参数表明吸附过程是自发的且吸热的。X射线光电子能谱（XPS）分析表明吸附过程伴随着氧化还原反应。

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