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均苯三甲酸功能化的层状双氢氧化物纳米复合材料的设计与合成及其在吸附有机染料靛蓝胭脂红和亚甲基蓝中的环境应用

Design and synthesis of LDH nano composite functionalized with trimesic acid and its environmental application in adsorbing organic dyes indigo carmine and methylene blue.

作者信息

Salamaat Hoda, Ghafuri Hossein, Ghanbari Nastaran

机构信息

Catalysts and Organic Synthesis Research Laboratory, Department of Chemistry, Iran University of Science and Technology, Tehran, 16846-13114, Iran.

出版信息

Heliyon. 2024 Jun 26;10(14):e33656. doi: 10.1016/j.heliyon.2024.e33656. eCollection 2024 Jul 30.

DOI:10.1016/j.heliyon.2024.e33656
PMID:39100470
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC11295991/
Abstract

This work designed and prepared an organic-inorganic nanocomposite using layered double hydroxide (LDH) inorganic substrate and trimesic acid (TMA) as chelating agent. Subsequently, the synthesized organic-inorganic nanocomposite was assessed using multiple identification methods, including FTIR, EDX, XRD, TGA, and FESEM, and the outcomes demonstrated that the intended structure was successfully prepared. Also, in order to investigate the efficiency of the Mg-Al LDH-TMA nanocomposite as an efficient nano adsorbent, it was used for removal of indigo carmine (IC) and methylene blue (MB) from aqueous solutions. This synthetic nanocomposite showed a high adsorption capacity. The efficiency of the produced nanocomposite in the adsorption of selected dyes was investigated with the help of batch adsorption studies performed in a variety of experimental settings, including dye concentration, adsorbent dose, pH, adsorption temperature and contact time. Furthermore, the produced Mg-Al LDH-TMA nanocomposite exhibits strong stability and can be recycled and reused five times in a row, which is well consistent with the principles of green chemistry.

摘要

本研究以层状双氢氧化物（LDH）无机基底和均苯三甲酸（TMA）作为螯合剂，设计并制备了一种有机-无机纳米复合材料。随后，采用傅里叶变换红外光谱（FTIR）、能谱分析（EDX）、X射线衍射（XRD）、热重分析（TGA）和场发射扫描电子显微镜（FESEM）等多种鉴定方法对合成的有机-无机纳米复合材料进行了评估，结果表明成功制备出了预期结构。此外，为了研究Mg-Al LDH-TMA纳米复合材料作为高效纳米吸附剂的效率，将其用于从水溶液中去除靛蓝胭脂红（IC）和亚甲基蓝（MB）。这种合成纳米复合材料表现出高吸附容量。借助在多种实验条件下进行的批量吸附研究，包括染料浓度、吸附剂剂量、pH值、吸附温度和接触时间，考察了所制备的纳米复合材料对选定染料的吸附效率。此外，所制备的Mg-Al LDH-TMA纳米复合材料具有很强的稳定性，可连续循环使用五次，这与绿色化学原理高度一致。

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