Amino-functionalized yolk-shell magnetic silica nanoparticles for the selective removal of heavy metal ions

IF 4.7 3区材料科学 Q1 CHEMISTRY, APPLIED Microporous and Mesoporous Materials Pub Date : 2025-04-01 Epub Date: 2025-01-30 DOI:10.1016/j.micromeso.2025.113535

Haiyu Li , Yuqian Jia , Yuan Chen , Qingyang Ye , Lichen Xian , Jieshu Qian

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Abstract

Heavy metals in natural waters exist in both anionic and cationic forms, posing significant risks to ecological safety and human health. However, the selective and efficient removal of these ions remains a considerable challenge. In this study, we synthesized amino-functionalized yolk-shell magnetic silica nanocomposites and evaluated their adsorption performance for heavy metal anions and cations. The nanocomposites exhibited high adsorption capacities of 210 mg/g for Pb(II) and 57.8 mg/g for Cu(II) cations, while the protonated nanocomposites achieved an adsorption capacity of 52.6 mg/g for As(V) anions. Notably, the nanocomposites maintained strong specific adsorption capabilities for heavy metal ions even in the presence of competing ions, along with excellent reusability and operational convenience. This work presents a methodically designed strategy for functionalizing magnetic solid nano-adsorbents for the selective removal of heavy metal ions from water, offering new insights into the potential applications of yolk-shell nanoparticles.

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氨基功能化蛋黄壳磁性二氧化硅纳米颗粒选择性去除重金属离子

天然水体中的重金属以阴离子和阳离子两种形式存在，对生态安全和人类健康构成重大风险。然而，选择性和有效地去除这些离子仍然是一个相当大的挑战。在本研究中，我们合成了氨基功能化的蛋黄壳磁性二氧化硅纳米复合材料，并评估了其对重金属阴离子和阳离子的吸附性能。纳米复合材料对Pb（II）和Cu（II）阳离子的吸附容量分别为210 mg/g和57.8 mg/g，而对As(V)阴离子的吸附容量为52.6 mg/g。值得注意的是，即使在竞争离子存在的情况下，纳米复合材料也保持了对重金属离子的强吸附能力，同时具有优异的可重复使用性和操作便利性。本研究提出了一种系统设计的磁性固体纳米吸附剂的功能化策略，用于选择性地去除水中的重金属离子，为蛋黄壳纳米颗粒的潜在应用提供了新的见解。

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来源期刊

Microporous and Mesoporous Materials 化学-材料科学：综合

CiteScore

10.70

自引率

5.80%

发文量

649

审稿时长

26 days

期刊介绍： Microporous and Mesoporous Materials covers novel and significant aspects of porous solids classified as either microporous (pore size up to 2 nm) or mesoporous (pore size 2 to 50 nm). The porosity should have a specific impact on the material properties or application. Typical examples are zeolites and zeolite-like materials, pillared materials, clathrasils and clathrates, carbon molecular sieves, ordered mesoporous materials, organic/inorganic porous hybrid materials, or porous metal oxides. Both natural and synthetic porous materials are within the scope of the journal. Topics which are particularly of interest include: All aspects of natural microporous and mesoporous solids The synthesis of crystalline or amorphous porous materials The physico-chemical characterization of microporous and mesoporous solids, especially spectroscopic and microscopic The modification of microporous and mesoporous solids, for example by ion exchange or solid-state reactions All topics related to diffusion of mobile species in the pores of microporous and mesoporous materials Adsorption (and other separation techniques) using microporous or mesoporous adsorbents Catalysis by microporous and mesoporous materials Host/guest interactions Theoretical chemistry and modelling of host/guest interactions All topics related to the application of microporous and mesoporous materials in industrial catalysis, separation technology, environmental protection, electrochemistry, membranes, sensors, optical devices, etc.