Moradi Omid, Mirzaian Masoud, Sedaghat Sajjad
Department of Chemistry, Faculty of Science, Shahr-e-Qods Branch, Islamic Azad University, Tehran, Iran.
Sci Rep. 2024 Sep 27;14(1):22318. doi: 10.1038/s41598-024-72937-4.
In this research, the use of a three-component nanocomposite of graphene oxide-methyl methacrylate and copper(II) oxide (PMMA-GO-CuO) was investigated. The aim of synthesizing this nanocomposite is to removal dye pollutants, specifically methylene blue (MB) and methyl orange (MO), which are commonly used in dyeing industries, through adsorption. The study focuses on creating GO-CuO and PMMA-GO-CuO nanocomposites as effective adsorbents. A simple and quick method led to the development of the PMMA-GO-CuO nanocomposite, which shows enhanced physical and chemical properties. Key materials include graphene oxide, methyl methacrylate, and copper(II) oxide nanoparticles. Characterization techniques such as FT-IR, XRD, SEM, and TGA were used to analyze the nanocomposite. Results indicate that dye adsorption is more effective at lower pH levels, suggesting that the PMMA-GO-CuO nanocomposite can efficiently remove dyes from industrial wastewater. The experimental data showed that the Langmuir isotherm model accurately represented the equilibrium adsorption, with maximum capacities of 285.71 mg g for methylene blue and 256.41 mg g for methyl orange, indicating a single layer of adsorption. The kinetics followed a pseudo-second order model, suggesting that the adsorption process involves chemical bonding. Additionally, thermodynamic parameters (ΔG°, ΔH°, and ΔS°) indicated that the adsorption is spontaneous. The adsorption mechanism involves hydrogen bonding, π-π interactions, and electrostatic interactions. This study investigates how factors like pH, temperature, contact time, and dye concentration affect the adsorption of methyl orange and methylene blue dyes. A PMMA-GO-CuO nanocomposite was used, achieving 84% removal of MB and 35% removal of MO from industrial wastewater. This study highlights the promising potential of PMMA-GO-CuO nanocomposite as an effective material for the removal of dye pollutants from industrial wastewater. The results showed that the graphene oxide in the composite is effective for removing cationic dyes due to its negative charge. Further research will focus on the optimization of the synthesis process with the aim of achieving competitive performance of this nanocomposite on a large scale. These findings not only advance the field of nanocomposite materials but also provide a practical solution to an important environmental issue, demonstrating the innovation of the present study in the literature.
在本研究中，对氧化石墨烯-甲基丙烯酸甲酯和氧化铜（PMMA-GO-CuO）的三元纳米复合材料的应用进行了研究。合成这种纳米复合材料的目的是通过吸附去除印染行业常用的染料污染物，特别是亚甲基蓝（MB）和甲基橙（MO）。该研究致力于制备作为有效吸附剂的GO-CuO和PMMA-GO-CuO纳米复合材料。一种简单快速的方法促成了PMMA-GO-CuO纳米复合材料的开发，其展现出增强的物理和化学性质。关键材料包括氧化石墨烯、甲基丙烯酸甲酯和氧化铜纳米颗粒。采用傅里叶变换红外光谱（FT-IR）、X射线衍射（XRD）、扫描电子显微镜（SEM）和热重分析（TGA）等表征技术对纳米复合材料进行分析。结果表明，在较低pH值下染料吸附更有效，这表明PMMA-GO-CuO纳米复合材料能够有效地从工业废水中去除染料。实验数据表明，朗缪尔等温线模型准确地描述了平衡吸附，亚甲基蓝的最大吸附容量为285.71 mg/g，甲基橙的最大吸附容量为256.41 mg/g，表明为单层吸附。动力学遵循准二级模型，这表明吸附过程涉及化学键合。此外，热力学参数（ΔG°、ΔH°和ΔS°）表明吸附是自发的。吸附机制涉及氢键、π-π相互作用和静电相互作用。本研究考察了pH值、温度、接触时间和染料浓度等因素对甲基橙和亚甲基蓝染料吸附的影响。使用PMMA-GO-CuO纳米复合材料从工业废水中实现了84%的MB去除率和35%的MO去除率。本研究突出了PMMA-GO-CuO纳米复合材料作为从工业废水中去除染料污染物的有效材料的广阔前景。结果表明，复合材料中的氧化石墨烯因其负电荷而对去除阳离子染料有效。进一步的研究将集中于优化合成工艺，以期在大规模上实现这种纳米复合材料的竞争性能。这些发现不仅推动了纳米复合材料领域的发展，还为一个重要的环境问题提供了切实可行的解决方案，证明了本研究在文献中的创新性。
