Enhanced thermal stability and adsorption performance of MIL-53(Fe)@montmorillonite

IF 1.1 4区地球科学 Q4 CHEMISTRY, PHYSICAL

Clay Minerals Pub Date : 2021-06-01 DOI:10.1180/clm.2021.23

Fenglin Dai, Junhui Guo, Yufeng He, Pengfei Song, Rongmin Wang

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引用次数: 4

Abstract

Abstract Montmorillonite (Mnt), a clay mineral with a nanolayered structure, was combined with an Fe-based metal–organic framework (MOF; MIL-53(Fe)) using an in situ growth technique that yielded a novel eco-friendly clay-based adsorbent (MIL-53(Fe)@Mnt). The adsorbent was characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, thermogravimetric analysis and N2 gas adsorption. The MIL-53(Fe) particles grew on the surface of the nanolayered Mnt and the MIL-53(Fe) particle size became smaller. The adsorption performance of MIL-53(Fe)@Mnt was investigated by removing methylene blue (MB), and optimization experiments were carried out to study the effects of contact time, pH, initial dye concentration and adsorbent mass on the adsorption processes. The MIL-53(Fe)@Mnt exhibited excellent adsorption capacity for MB, namely 313.7 mg g−1, which was 3.02 times and 3.54 times greater than that of pure Mnt and MIL-53(Fe), respectively. Adsorption was fitted with the Langmuir isotherm model and followed a pseudo-second order kinetic model. The MIL-53(Fe)@Mnt obtained is a low-cost and eco-friendly adsorbing material and might be a candidate for removing dyes during water treatment.

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增强了MIL-53(Fe)@蒙脱土的热稳定性和吸附性能

摘要蒙脱石（Mnt）是一种具有纳米层状结构的粘土矿物，使用原位生长技术将其与铁基金属-有机骨架（MOF；MIL-53（Fe））相结合，产生了一种新型的环保粘土基吸附剂（MIL-53（铁）@Mnt）。通过扫描电子显微镜、傅立叶变换红外光谱、X射线衍射、热重分析和N2气体吸附对吸附剂进行了表征。MIL-53（Fe）颗粒在纳米层Mnt的表面上生长，并且MIL-53（铁）颗粒尺寸变小。通过去除亚甲基蓝（MB），研究了MIL-53（Fe）@Mnt的吸附性能，并进行了优化实验，研究了接触时间、pH、初始染料浓度和吸附剂质量对吸附过程的影响。MIL-53（Fe）@Mnt对MB表现出优异的吸附能力，即313.7 mg g−1，分别是纯Mnt和MIL-53（铁）的3.02倍和3.54倍。吸附符合Langmuir等温线模型，遵循拟二阶动力学模型。获得的MIL-53（Fe）@Mnt是一种低成本、环保的吸附材料，可能是水处理过程中去除染料的候选材料。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Clay Minerals 地学-矿物学

CiteScore

3.00

自引率

20.00%

发文量

审稿时长

6 months

期刊介绍： Clay Minerals is an international journal of mineral sciences, published four times a year, including research papers about clays, clay minerals and related materials, natural or synthetic. The journal includes papers on Earth processes soil science, geology/mineralogy, chemistry/material science, colloid/surface science, applied science and technology and health/ environment topics. The journal has an international editorial board with members from fifteen countries.