The aim of this work is developing an adsorbent for the removal of anionic Acid Blue 45 dye from aqueous solutions. In this regard, the polyaniline/sulfonated‐covalent organic polymer nanocomposites (PANI/S‐COP NCs) were synthesized by in situ chemical polymerization method. The structure and morphology of these prepared nanocomposites were characterized by different techniques. The structural stability of the synthesized adsorbent was examined under different pH conditions. To optimize the adsorption conditions, various parameters such as pH, dye concentration, adsorbent dosage, contact time, and temperature were investigated. The maximum adsorption capacity of the prepared composite for 100 ppm of dye (at 25.0°C, pH: 5, and time: 120 minutes as optimum conditions) was 117 mg g⁻¹. Different adsorption models were applied for the fitting of the obtained experimental data. It was found that the adsorption data can be well fitted to the linear Langmuir model (R²: .999). The adsorption kinetics can also be well described by the linear pseudo‐second‐order model, indicating the chemical adsorption mechanism for the dye molecules on the PANI/S‐COP NCs surface.

中文翻译：

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聚苯胺/磺化共价有机聚合物纳米复合材料：结构和染料吸附性能

这项工作的目的是开发一种吸附剂，用于从水溶液中去除阴离子酸性蓝45染料。在这方面，聚苯胺/磺化共价有机聚合物纳米复合材料（PANI / S-COP NCs）是通过原位化学聚合方法合成的。这些制备的纳米复合材料的结构和形态用不同的技术表征。在不同的pH条件下检查了合成吸附剂的结构稳定性。为了优化吸附条件，研究了各种参数，例如pH，染料浓度，吸附剂用量，接触时间和温度。制备的复合材料对100 ppm染料的最大吸附容量（在25.0°C，pH：5，最佳时间：120分钟）为117 mg g ^-1。应用不同的吸附模型对获得的实验数据进行拟合。发现吸附数据可以很好地拟合线性朗缪尔模型（R ²：.999）。吸附动力学也可以用线性伪二级模型很好地描述，表明了PANI / S-COP NCs表面上染料分子的化学吸附机理。