Preparation of palygorskite/MIL-88A(Fe) composites for high-efficient removal of Congo red

IF 5.3 2区地球科学 Q2 CHEMISTRY, PHYSICAL

Applied Clay Science Pub Date : 2023-09-15 DOI:10.1016/j.clay.2023.107003

Wenting Gao, Bin Mu, Yongfeng Zhu, Aiqin Wang

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引用次数: 2

Abstract

Metal-organic frameworks with favorable adsorption performance have attracted increasing interesting in water treatment. However, the poor pH stability and tedious preparation processes are still the major disadvantages for practical application. To address these problems, novel palygorskite/MIL-88A(Fe) (PMFe-x) composites were prepared via a convenient in-situ growth strategy after incorporation of natural palygorskite into MIL-88A(Fe). The characterization results revealed that Pal was incorporated into the MIL-88A(Fe) crystal structure, and thus the as-prepared PMFe-x composites presented excellent adsorption performance and acid/alkali stability in the pH range of 2–12. The maximum adsorption capacity of composites to Congo red reached 1141.4 mg g⁻¹ within 3 h, which was much higher than that of pure MIL-88A(Fe). Moreover, the spent MOFs composites after adsorption of dye were facilely regenerated by calcination treatment at 300 °C under N₂ atmosphere, and the adsorption capacity of the regenerated composites to Congo red maintained more than 360 mg g^-1 after five cycles, Due to the excellent acid/alkali resistance and adsorption properties, the obtained MOFs composites presented good application prospects in water treatment.

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坡缕石/MIL-88A(Fe)复合材料高效去除刚果红的制备

金属有机骨架以其良好的吸附性能在水处理领域受到越来越多的关注。但pH稳定性差、制备工艺繁琐仍是制约其实际应用的主要缺点。为了解决这些问题，采用原位生长策略，在MIL-88A(Fe)中掺入天然的坡gorskite，制备了新型坡gorskite/MIL-88A(Fe) (PMFe-x)复合材料。表征结果表明，Pal被掺入MIL-88A(Fe)晶体结构中，制备的PMFe-x复合材料在pH 2-12范围内具有优异的吸附性能和酸碱稳定性。复合材料对刚果红的最大吸附量在3 h内达到1141.4 mg g−1，远高于纯MIL-88A(Fe)。此外，吸附染料后的废mof复合材料在300℃N2气氛下进行煅烧处理，再生后的复合材料经过5次循环后对刚刚红的吸附量保持在360 mg g-1以上，具有优异的耐酸碱性能和吸附性能，在水处理中具有良好的应用前景。

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来源期刊

Applied Clay Science 地学-矿物学

CiteScore

10.30

自引率

10.70%

发文量

289

审稿时长

39 days

期刊介绍： Applied Clay Science aims to be an international journal attracting high quality scientific papers on clays and clay minerals, including research papers, reviews, and technical notes. The journal covers typical subjects of Fundamental and Applied Clay Science such as: • Synthesis and purification • Structural, crystallographic and mineralogical properties of clays and clay minerals • Thermal properties of clays and clay minerals • Physico-chemical properties including i) surface and interface properties; ii) thermodynamic properties; iii) mechanical properties • Interaction with water, with polar and apolar molecules • Colloidal properties and rheology • Adsorption, Intercalation, Ionic exchange • Genesis and deposits of clay minerals • Geology and geochemistry of clays • Modification of clays and clay minerals properties by thermal and physical treatments • Modification by chemical treatments with organic and inorganic molecules(organoclays, pillared clays) • Modification by biological microorganisms. etc...