Synthesis and characterization of surface-modified magnetic mesoporous silicate materials for phosphate adsorption.

IF 16.4 1区化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2023-11-02 eCollection Date: 2024-01-01 DOI:10.55730/1300-0527.3638

Ayşegül Gençer, Burcu Uysal Karataş, Önder Topel, Nadir Kiraz

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Abstract

The magnetic mesoporous silica material, Mag-MCM-41, was synthesized by coating magnetite (Fe₃O₄) nanoparticles with a mesoporous material called MCM-41. Mag-MCM-41 and modified nanomaterials Mag-MCM-41-NN and Mag-MCM-41-NN-Fe⁺³ which were modified with aminopropyl functional groups. In water and wastewater, phosphate anions are considered significant contaminants due to their detrimental impact on the environment. They promote the growth of algae, leading to eutrophication. The purpose of this study is to investigate the removal of phosphate anions from aqueous solutions using modified magnetic silica particles. The Mag-MCM-41 material exhibits hexagonal properties and belongs to the class of "mesoporous" materials. It has a surface area of 923 m².g^-1, which was determined through N₂ adsorption-desorption isotherms, FTIR, TEM, BET, and SAXS analysis. Kinetic and adsorption isotherm studies were conducted using Mag-MCM-41, Mag-MCM-41-NN, and Mag-MCM-41-NN-Fe⁺³ adsorbents to examine the behavior of phosphate anions. The kinetic and adsorption isotherm studies of phosphate anions revealed that the adsorption process on Mag-MCM-41, Mag-MCM-41-NN, and Mag-MCM-41-NN-Fe⁺³ adsorbents followed the chemical adsorption mechanism. Phosphate adsorption on all adsorbents occurred in a monolayer, and the MCM-41-NN-Fe⁺³ adsorbent exhibited the highest maximum adsorption capacity (qm) value of 112.87 mg.g^-1 compared to the other adsorbents.

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用于磷酸盐吸附的表面改性磁性介孔硅酸盐材料的合成与表征。

磁性介孔二氧化硅材料 Mag-MCM-41 是通过在磁铁矿（Fe3O4）纳米粒子上涂覆一种名为 MCM-41 的介孔材料而合成的。Mag-MCM-41 以及用氨基丙基官能团改性的改性纳米材料 Mag-MCM-41-NN 和 Mag-MCM-41-NN-Fe+3。在水和废水中，磷阴离子因其对环境的有害影响而被视为重要污染物。它们会促进藻类的生长，导致富营养化。本研究的目的是调查使用改性磁性二氧化硅颗粒去除水溶液中磷酸盐阴离子的情况。Mag-MCM-41 材料具有六边形特性，属于 "介孔 "材料。它的表面积为 923 m2.g-1，这是通过 N2 吸附-解吸等温线、傅立叶变换红外光谱、TEM、BET 和 SAXS 分析确定的。使用 Mag-MCM-41、Mag-MCM-41-NN 和 Mag-MCM-41-NN-Fe+3 吸附剂进行了动力学和吸附等温线研究，以考察磷酸盐阴离子的行为。磷酸盐阴离子的动力学和吸附等温线研究表明，Mag-MCM-41、Mag-MCM-41-NN 和 Mag-MCM-41-NN-Fe+3 吸附剂上的吸附过程遵循化学吸附机制。磷酸盐在所有吸附剂上的吸附都是以单层形式进行的，与其他吸附剂相比，MCM-41-NN-Fe+3 吸附剂的最大吸附容量（qm）值最高，达到 112.87 mg.g-1。

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来源期刊

Accounts of Chemical Research 化学-化学综合

CiteScore

31.40

自引率

1.10%

发文量

312

审稿时长

2 months

期刊介绍： Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.