Abstract

Iron sulfide functionalized polyaniline nanocomposite was successfully synthesized using the in-situ polymerization technique. SAED, TEM, SEM, FTIR, XRD, and BET measurements were used to characterize the materials. Thermodynamic and kinetic studies using the batch approach were performed on the adsorption of Eosin yellow from aqueous solutions using the nanocomposite. The pseudo-second order kinetic model and the Langmuir isotherm fitted the adsorption process. An endothermic process was indicative from the positive ∆H° (11.84 kJ/mol) value. The negative values of ∆G° (from –1.49 to –2.28 kJ/mol for temperatures from 300 to 318 K, respectively) showed the thermodynamically viable nature of the adsorption process and the spontaneity of the reaction within the temperature ranges. A high disorderliness in the system was indicative from the positive magnitude of ∆S° (0.044 kJ/(mol K)). These results present a potential for the use of iron sulfide functionalized polyaniline material for the uptake of Eosin Y from water.

中文翻译：

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用于从水中去除曙红 Y 的硫化铁功能化聚苯胺纳米复合材料：平衡和动力学研究

摘要

使用原位聚合技术成功合成了硫化铁功能化聚苯胺纳米复合材料。SAED、TEM、SEM、FTIR、XRD 和 BET 测量用于表征材料。使用分批方法对使用纳米复合材料从水溶液中吸附曙红黄进行了热力学和动力学研究。拟二级动力学模型和朗缪尔等温线拟合吸附过程。吸热过程由正 ∆ H ° (11.84 kJ/mol) 值表示。∆ G的负值°（从 –1.49 到 –2.28 kJ/mol，温度分别为 300 到 318 K）显示了吸附过程的热力学可行性和温度范围内反应的自发性。Δ S ° (0.044 kJ/(mol K))的正大小表明系统中的高度无序性。这些结果显示了使用硫化铁官能化聚苯胺材料从水中吸收曙红 Y 的潜力。