Preparation of Fe3O4/TiO2/Polypyrrole Ternary Magnetic Composite and Using as Adsorbent for the Removal of Acid Red G
Preparation of Fe3O4/TiO2/Polypyrrole Ternary Magnetic Composite and Using as Adsorbent for the Removal of Acid Red G
复制标题
Fe3O4/TiO2/聚吡咯三元磁性复合材料的制备及其作为吸附剂去除酸性红G的研究
DOI：
10.1007/s10924-016-0839-7
复制
发表时间：
2017-09-01
影响因子：
5.3
通讯作者：
Yan, Wei
中科院分区：
文献类型：
--
作者：
Feng, Jiangtao;Sun, Nana;Yan, Wei
研究了Fe3O4/TiO2/PPy三元复合材料对水溶液中酸性红G的吸附性能。首先，将Fe3O4引入到TiO2/PPy复合材料的制备过程中，制备了Fe3O4/TiO2/PPy三元复合材料。傅立叶变换红外光谱(FT-IR)、X射线衍射图(XRD)和磁化测试证实了Fe3O4在三元复合材料中的存在。比表面积和Zeta电位测试表明，制备的Fe3O4/TiO2/PPy复合材料具有与TiO2PPy复合材料相似的表面性质。制得的Fe3O4/TiO2PPy复合材料对水溶液中酸性红G的吸附容量为161.8 mg/g，20min内即可达到吸附平衡。通过外加磁场可以很容易地从溶液中回收该复合材料，并通过简单的碱性/酸性交替过程进行再生。该复合材料在6次吸附/脱附循环后仍能保持约86%的吸附效率。复合材料的吸附等温线可用Langmuir模型描述，吸附动力学可用准二级模型描述。吸附机理主要为静电相互作用和氢键作用。这说明引入的Fe3O4不仅保持了TiO2PPy的吸附性能，而且提高了回收性能。
This study focuses on the adsorption performance of the Fe3O4/TiO2/PPy ternary composite for Acid Red G from aqueous solution. Firstly, Fe3O4/TiO2/PPy Ternary composite was synthesized by introducing Fe3O4into the preparation process of TiO2/PPy composite. Fourier transformation infrared spectra (FT-IR), X-ray diffraction patterns (XRD) and the magnetization test confirmed the existence of Fe3O4in the ternary composite. The specific surface area and the zeta potential test suggested that the as-prepared Fe3O4/TiO2/PPy composite showed the similar surface nature to the TiO2/PPy composite. The obtained Fe3O4/TiO2/PPy composite exhibited an excellent adsorption capacity of 161.8 mg/g for Acid Red G (ARG) from aqueous solution and can reach the equilibrium within 20 min. The composite can be easily retrieved from the solution by an external magnetic field and regenerated simply by an alkaline/acidic alternate process. The composite retained about 86 % of the adsorption efficiency after six adsorption/desorption cycles. The adsorption isotherms and kinetics of the composite can be well described by Langmuir and pseudo-second-order models, respectively. The electrostatic interaction and the hydrogen bonding were the main adsorption mechanism. This illustrates that the introduced Fe3O4not only maintained the adsorption capability of TiO2/PPy but also improve the reclaim performance.