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首页> 外文期刊>Journal of Applied Polymer Science >Synthesis of Fe3O4@SiO2@MPS@P4VP nanoparticles for nitrate removal from aqueous solutions
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Synthesis of Fe3O4@SiO2@MPS@P4VP nanoparticles for nitrate removal from aqueous solutions

机译：Fe3O4 @ SiO2 @ MPS @ P4VP纳米粒子的合成用于水溶液中硝酸盐的去除

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摘要

In this study, synthesis of Fe3O4@SiO2@MPS@poly(4-vinylpyridine)core-shell-shell structure was investigated as an efficient adsorbent for removal of nitrate ions from aqueous solutions. Fe3O4 nanoparticles were initially prepared by co-precipitation method, then the surface of Fe3O4 was coated with SiO2 through a modified St ober method. Finally, the Fe3O4@SiO2 nanoparticles were modified by 3-(trimethoxysilyl) propyl methacrylate followed by emulsion polymerization of 4-vinylpyridine. The resultant material was acidified in HCl solution to be effective for nitrate removal. The synthesized sample was characterized by X-ray diffraction, transmission electron microscopy, field-emission scanning electron microscopy, Fourier-transform infrared spectra, thermogravimetric analysis (TGA), and vibrating sample magnetometer. The removal efficiency was optimized for some experimental parameters such as pH, contact time, and amount of sorbent loading. The maximum predictable adsorption capacity was 80.6 (mg nitrate/g sorbent) at optimum conditions. Also, regeneration of the nitrate adsorbed particles was possible with NaOH solution. (C) 2016 Wiley Periodicals, Inc.
机译：在这项研究中，Fe3O4 @ SiO2 @ MPS @聚（4-乙烯基吡啶）核-壳-壳结构的合成被研究为一种从水溶液中去除硝酸根离子的有效吸附剂。首先通过共沉淀法制备Fe3O4纳米颗粒，然后通过改进的St ober方法用SiO2覆盖Fe3O4的表面。最后，用甲基丙烯酸3-（三甲氧基甲硅烷基）丙酯对Fe3O4 @ SiO2纳米粒子进行改性，然后对4-乙烯基吡啶进行乳液聚合。将所得物质在HCl溶液中酸化以有效去除硝酸盐。通过X射线衍射，透射电子显微镜，场发射扫描电子显微镜，傅立叶变换红外光谱，热重分析（TGA）和振动样品磁力计对合成样品进行表征。针对某些实验参数（例如pH，接触时间和吸附剂负载量）优化了去除效率。在最佳条件下，最大可预测吸附容量为80.6（硝酸盐/克吸附剂）。同样，用NaOH溶液可以再生硝酸盐吸附的颗粒。 （C）2016威利期刊公司

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