Synthesis and characterization of novel halloysite-agar-Ni0.5Zn0.5Mn2O4 composite for efficient methylene blue dye removal

Next Materials Pub Date : 2025-03-18 DOI:10.1016/j.nxmate.2025.100588

Khawla Benyahia , Hafida Sehil , Abdelkader Chougui , Abdel-Hamid I. Mourad , Abdelkader Dehbi , Nizamudeen Cherupurakal , Reem H. Alzard

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Abstract

In this research work, An innovative halloysite-agar -Ni₀.₅Zn₀.₅Mn₂O₄ nanocomposite was successfully synthesized by incorporating halloysite and Ni_0.5Zn_0.5Mn₂O₄ into agar networks through cross-linking with Epichlorohydrin. FTIR, XRD, TGA/DTA, SEM-EDS methods were used to characterize the synthesized nanocomposite. In addition, the swelling rate and PHpzc of the product obtained were also studied. FTIR analysis revealed the presence of functional groups associated with all components and XRD revealed that adding halloysite to the agar matrix significantly improved the thermal stability of the composite compared to its constituents. The Halloysite/Agar/Ni_0.5Zn_0.5Mn₂O₄'s porous structure was evident in the SEM investigation, which contributed to its high adsorption capacity. The analysis of the swelling characteristics showed that the percentage of swelling of the hydrogel attained a maximum ratio of 939,3 % in water. This high swelling capacity contributed to the excellent adsorption performance of the nanocomposite. The nanocomposite obtained was applied as an adsorbent for eliminating methylene blue which was chosen as a model for cationic dyes. It demonstrated a remarkable adsorption capacity of 130 mg/g for this dye under the optimal conditions: 60 g/l agar, Epichlorohydrin (0.1 M), 20 % halloysite and 20 % Oxide, at PH= 6 and ambient temperature.

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新型高岭土-琼脂- ni0.5 zn0.5 mn2o4复合材料的合成与表征

在这项研究工作中，一种创新的高岭土-琼脂-Ni 0 .₅Zn 0。通过与环氧氯丙烷交联，将高岭土和Ni0.5Zn0.5Mn2O4掺入琼脂网络，成功合成了₅Mn₂O₄纳米复合材料。采用FTIR、XRD、TGA/DTA、SEM-EDS等方法对合成的纳米复合材料进行表征。此外，还对所得产物的溶胀率和PHpzc进行了研究。FTIR分析显示，所有组分都存在与之相关的官能团，XRD分析显示，在琼脂基质中加入高岭土，与其他组分相比，复合材料的热稳定性得到了显著提高。SEM分析表明，高岭土/琼脂/Ni0.5Zn0.5Mn2O4具有明显的多孔结构，具有较高的吸附能力。溶胀特性分析表明，水凝胶在水中的溶胀率最大可达939.3 %。这种高膨胀能力使得纳米复合材料具有优异的吸附性能。将所制得的纳米复合材料作为吸附剂用于去除阳离子染料亚甲基蓝。在PH= 6和环境温度下，琼脂60 g/l，环氧氯丙烷（0.1 M），高石20 %和氧化物20 %的最佳条件下，该染料的吸附量为130 mg/g。

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