Noticeable improvement in adsorption capacity of glycine-modified MgAl-LDH in the removal of Methyl Orange dye compared to urea standard method

Q2 Engineering

Materials Research Innovations Pub Date : 2022-07-18 DOI:10.1080/14328917.2022.2101305

A. El khanchaoui, Nezha Boukontar, M. Sajieddine, K. Hnini, A. Essoumhi

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引用次数: 2

Abstract

ABSTRACT In this paper, a simple chemical method in the presence of glycine is described to fabricate the hierarchical structure of MgAl-based Layered Double Hydroxides (Gly-LDH), served as high-performance adsorbent for Methyl orange (MO) . To elucidate the effect of glycine on the adsorption capacity, the MgAl-LDH intercalated with CO3 2- anions was also prepared by urea hydrolysis method (Ur-LDH). The as-synthesised nanostructures were characterised by X-ray diffraction (XRD), Thermogravimetry/Differential Scanning Calorimetry (TG–DSC), Fourier transform infrared spectroscopy (FTIR), and Scanning Electron Microscopy (SEM), . The results demonstrated that the glycine intercalated LDH exhibited high adsorption capacity for MO dye compared with MgAl-LDH obtained by urea hydrolysis method. Adsorption isotherm data for MO adsorption on Gly-LDH at 300 K and acidic pH fitted well to the Langmuir isotherm model with a maximum adsorption capacity of 800 mg/g. l. The sorption mechanism indicates that MO molecules could be sorbed onto Gly-LDH via electrostatic attraction, and ion exchange.

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与尿素标准法相比，甘氨酸修饰的MgAl-LDH对甲基橙染料的吸附能力有明显提高

摘要本文采用甘氨酸存在下的简单化学方法制备了mgal基层状双氢氧化物(Gly-LDH)，作为甲基橙(MO)的高效吸附剂。为了研究甘氨酸对吸附量的影响，采用尿素水解法制备了co32 -阴离子插层的MgAl-LDH (Ur-LDH)。采用x射线衍射(XRD)、热重/差示扫描量热法(TG-DSC)、傅里叶红外光谱(FTIR)和扫描电镜(SEM)对合成的纳米结构进行了表征。结果表明，与尿素水解法制得的MgAl-LDH相比，甘氨酸插层LDH对MO染料具有较高的吸附能力。在300 K和酸性pH条件下，MO在Gly-LDH上的吸附等温线数据符合Langmuir等温线模型，最大吸附量为800 mg/g。1 .吸附机理表明，MO分子可以通过静电吸引和离子交换吸附到Gly-LDH上。

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来源期刊

Materials Research Innovations 工程技术-材料科学：综合

CiteScore

5.20

自引率

0.00%

发文量

审稿时长

2.8 months

期刊介绍： Materials Research Innovations covers all areas of materials research with a particular interest in synthesis, processing, and properties from the nanoscale to the microscale to the bulk. Coverage includes all classes of material – ceramics, metals, and polymers; semiconductors and other functional materials; organic and inorganic materials – alone or in combination as composites. Innovation in composition and processing to impart special properties to bulk materials and coatings, and for innovative applications in technology, represents a strong focus. The journal attempts to balance enduring themes of science and engineering with the innovation provided by such areas of research activity.