Synthesis of magnetic 4A zeolite and its performance on ammonia nitrogen adsorption in water

IF 2.7 4区材料科学 Q3 MATERIALS SCIENCE, MULTIDISCIPLINARY Journal of Materials Research Pub Date : 2024-08-29 DOI:10.1557/s43578-024-01422-5

Deqi Tang, Tao Meng, Zhaoteng Xue, Dongsen Mao

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Abstract

Fe₃O₄@SiO₂/4A magnetic nanocomposites (magnetic 4A zeolite) have been synthesized by hydrothermal method which endowed 4A zeolite with magnetic separation characteristics. XRD results showed that the magnetic 4A zeolite had the characteristic diffraction peaks of both 4A zeolite and Fe₃O₄. The SEM images displayed the combination of 4A zeolite and Fe₃O₄. N₂ physical adsorption showed that magnetic 4A zeolite had a large specific surface area and can provide a large number of adsorption sites for ammonia nitrogen. The magnetic separation results showed that magnetic 4A zeolite exhibited fast response to external magnetic field, and the saturation strength measured by VSM was 5.85 emu g⁻¹, indicating the superparamagnetic properties of magnetic 4A zeolite. The removal rate of ammonia nitrogen by FSA-M-1 sample reached to 43.18%. After 6 rounds of repeated adsorption experiments, each sample’s magnetic recovery rate was above 95%, and the removal rate of ammonia nitrogen was higher than 36%.

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磁性 4A 沸石的合成及其在水中吸附氨氮的性能

通过水热法合成了 Fe3O4@SiO2/4A 磁性纳米复合材料（磁性 4A 沸石），赋予了 4A 沸石磁分离特性。XRD 结果表明，磁性 4A 沸石具有 4A 沸石和 Fe3O4 的特征衍射峰。扫描电镜图像显示了 4A 沸石和 Fe3O4 的结合。N2 物理吸附表明，磁性 4A 沸石具有较大的比表面积，可为氨氮提供大量的吸附位点。磁分离结果表明，磁性 4A 沸石对外部磁场具有快速响应，VSM 测得的饱和强度为 5.85 emu g-1，表明磁性 4A 沸石具有超顺磁性。FSA-M-1 样品对氨氮的去除率达到 43.18%。经过 6 轮重复吸附实验，每个样品的磁性回收率均在 95% 以上，氨氮去除率高于 36%。

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来源期刊

Journal of Materials Research 工程技术-材料科学：综合

CiteScore

4.50

自引率

3.70%

发文量

362

审稿时长

2.8 months

期刊介绍： Journal of Materials Research (JMR) publishes the latest advances about the creation of new materials and materials with novel functionalities, fundamental understanding of processes that control the response of materials, and development of materials with significant performance improvements relative to state of the art materials. JMR welcomes papers that highlight novel processing techniques, the application and development of new analytical tools, and interpretation of fundamental materials science to achieve enhanced materials properties and uses. Materials research papers in the following topical areas are welcome. • Novel materials discovery • Electronic, photonic and magnetic materials • Energy Conversion and storage materials • New thermal and structural materials • Soft materials • Biomaterials and related topics • Nanoscale science and technology • Advances in materials characterization methods and techniques • Computational materials science, modeling and theory