Engineered hybrid iron‐cobalt metal oxide nanoparticles for effective adsorption of malachite green dye
Nasira Hussain, Shanza Shafaat, Ambreen Sarfraz, Muhammad Usman, Muhammad Saqib Khan, Asad Muhammad Khan, Rafaqat Ali Khan, Bilal Ahmad Zafar Amin, Muhammad Bilal, Ahson Jabbar Shaikh
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用于有效吸附孔雀石绿染料的工程混合铁钴金属氧化物纳米粒子
背景众所周知,铁和钴金属氧化物杂化纳米粒子在尺寸和稳定性方面尚未达到最佳状态。我们采用共沉淀法设计了这种混合纳米粒子,并通过各种技术对其进行了表征,然后将其用于有效吸附和去除孔雀石绿(MG)染料。结果理想的合成条件是 Fe2O3 和 CoO 的比例为 50:50,pH 值为 11,温度范围为 40 ℃-60 ℃,反应物添加时间为 20 分钟。这些混合纳米吸附剂能有效去除水溶液中的 MG 染料。在去除 MG 的过程中,对 MG 染料的初始浓度、介质的 pH 值、接触时间、温度和纳米吸附剂的剂量等因素进行了优化,以达到 96.9% 的最高去除率。数据的非线性拟合表明,Langmuir 模型和 Freundlich 模型都提供了最佳拟合,表明混合纳米粒子上存在单层和多层 MG 吸附。颗粒内扩散(IPD)现象更好地控制了 MG 染料的去除动力学。混合纳米粒子对 MG 的吸附被证实是内热的,ΔG 值为负,ΔH 值为正。优化的合成条件也对杂化纳米粒子产生了积极影响,增强了吸附能力,与文献报道的超顺磁性相比,杂化纳米粒子表现出铁磁性,这使其在染料去除应用中具有重要意义。© 2024 化学工业学会(SCI)。
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