化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (6) : 241-244. DOI: 10.19817/j.cnki.issn1006-3536.2022.06.047

科学研究

磁性硅基复合材料的合成及对废水中亚甲基蓝的吸附研究

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Synthesis of magnetic silicon matrix composite and adsorption of MB in wastewater

Liu Fang, Yang Fan

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文章历史 +

Received
2021-10-28
Issue Date	Revised Date
2022-07-06	2021-10-28

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摘要

采用水热合成法,以Fe₂O₃、正硅酸乙酯作为前驱体,在碱性环境下,通过超声作用,合成出磁性纳米复合材料Fe₂O₃/MCM-41。复合材料的结构和形貌通过X射线衍射、透射电镜,磁学性能进行表征。结果表明:Fe₂O₃与MCM-41成功复合,呈粒径相对均一的球状形貌,粒径约为60nm,饱和磁化强度43.1emu/g,较强的磁性能有利于循环吸附实验。进一步探讨了复合材料吸附亚甲基蓝的影响因素,寻找到吸附的最优条件,并对水中亚甲基蓝进行循环吸附实验,亚甲基蓝初始浓度为90mg/L,Fe₂O₃/MCM-41的量为30mg,pH为11,吸附温度为25℃,吸附时间为10min时,吸附效果最好。循环吸附15次后,亚甲基蓝褪色率仍为82%,表明该复合材料是一种较理想的循环吸附材料。

Abstract

Fe₂O₃/MCM-41 magnetic nanocomposite was synthesized by using hydrothermal synthesis method,using Fe₂O₃ and ethyl orthosilicate as precursors,under alkaline environment,through ultrasonic action.The structure and morphology of the material were characterized by XRD,TEM and magnetic properties.The results showed that Fe₂O₃ and MCM-41 were successfully combined,showing the spherical morphology with the particle size of about 60nm and saturation magnetization strength of 43.1emu/g.Strong magnetic properties were favorable for cyclic adsorption experiments.The experimental results showed that the initial concentration of methylene blue (MB) was 90mg/L,the amount of Fe₂O₃/MCM-41 was 30mg,the pH was 11,and the adsorption temperature was 25℃.When the adsorption time was 10min,the adsorption effect was the best.After 15 times of cyclic adsorption,the fading rate of MB was still 82%,which shown that the composite was ideal cyclic adsorption material.

关键词

三氧化二铁 / MCM-41 / 亚甲基蓝 / 循环吸附

Key words

ferric oxide / MCM-41 / methylene blue / cyclic adsorption

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磁性硅基复合材料的合成及对废水中亚甲基蓝的吸附研究[J]. 化工新型材料, 2022, 50(6): 241-244 DOI:10.19817/j.cnki.issn1006-3536.2022.06.047

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基金资助

国家自然科学基金(50573030)

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