磁性核壳Fe<sub>3</sub>O<sub>4</sub>/P (GMA-DVB)-SH-Au复合催化剂的制备及催化性能

doi:10.11868/j.issn.1001-4381.2018.000856

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摘要

首先通过水热法合成了单分散空心Fe₃O₄磁球，之后利用蒸馏沉淀聚合将P（GMA-DVB）聚合物层包覆在Fe₃O₄磁球表面形成Fe₃O₄/P（GMA-DVB）核壳结构，巯基化处理后吸附Au纳米粒子，得到磁性核壳Fe₃O₄/P（GMA-DVB）-SH-Au复合催化剂。利用TEM，SEM，FTIR，XRD，TGA，VSM及UV-vis对其进行表征，并考察该催化剂在催化还原4-硝基苯酚反应中的催化性能。结果表明合成的材料粒径均匀，球形度规整，核壳结构明显，在催化反应中，Fe₃O₄/P（GMA-DVB）-SH-Au表现出优异的催化性能，而且经过连续8次循环使用后，催化效率仍可保持80%以上。

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	马明亮
	杨玉莹
	吕平
	贾丽
	贾新城
	陈柳
	孔令运
	池丽凤

关键词 ：功能材料, Fe₃O₄/P (GMA-DVB)-SH-Au核壳催化剂, 催化性能, 磁性分离, 循环利用

Abstract：

In this work, monodisperse hollow Fe₃O₄ magnetic microspheres were synthesized by hydrothermal method. And the P(GMA-DVB) polymer layer was coated on the surface of Fe₃O₄ microspheres by distillation precipitation polymerization method to form core-shell structure. After adsorption of Au nanoparticles, a magnetic core-shell Fe₃O₄/P(GMA-DVB)-SH-Au supported catalyst was obtained. The morphologies, structures and catalytic performance of the catalysts were characterized by TEM, SEM, FTIR, XRD, TGA, VSM and UV-vis. Results show that the synthesized materials have uniform particle size, regular microsphere, and obvious core-shell struc-ture. For the catalytic reduction of 4-nitrophenol, the Fe₃O₄/P(GMA-DVB)-SH-Au exhibits excellent catalytic performance, and the catalytic efficiency still maintains over 80% after 8 successive cycles.

Key words： functional materials core-shell Fe₃O₄/P(GMA-DVB)-SH-Au catalyst catalytic property magnetic separation recyclable catalyst

收稿日期: 2018-07-16 出版日期: 2019-06-17

中图分类号:

TB34

基金资助:国家自然科学基金项目(51503116);国家自然科学基金项目(51578298)

通讯作者: 马明亮 E-mail: mamingliang@qut.edu.cn

作者简介: 马明亮(1983-), 男, 博士, 讲师, 主要从事新型功能材料及性能研究, 联系地址:山东省青岛市市北区抚顺路11号青岛理工大学(266033), E-mail:mamingliang@qut.edu.cn

引用本文:

马明亮, 杨玉莹, 吕平, 贾丽, 贾新城, 陈柳, 孔令运, 池丽凤. 磁性核壳Fe₃O₄/P (GMA-DVB)-SH-Au复合催化剂的制备及催化性能[J]. 材料工程, 2019, 47(6): 70-76.
Ming-liang MA, Yu-ying YANG, Ping LYU, Li JIA, Xin-cheng JIA, Liu CHEN, Ling-yun KONG, Li-feng CHI. Synthesis and catalytic performance of magnetic core-shell structure Fe₃O₄/P(GMA-DVB)-SH-Au composite catalyst. Journal of Materials Engineering, 2019, 47(6): 70-76.

链接本文:

http://jme.biam.ac.cn/CN/10.11868/j.issn.1001-4381.2018.000856 或 http://jme.biam.ac.cn/CN/Y2019/V47/I6/70

Fig.1 Fe₃O₄/P(GMA-DVB)-SH-Au核壳磁性催化剂的合成

Fig.2 材料的微观形貌图(a)Fe₃O₄微球TEM照片；(b)Fe₃O₄/P(GMA-DVB)微球TEM照片；(c)Fe₃O₄/P(GMA-DVB)-SH-Au微球TEM照片; (d)Fe₃O₄/P(GMA-DVB)-SH-Au微球SEM照片

Fig.3 微球的FTIR光谱

Fig.4 微球的XRD谱图

Fig.5 微球的TGA曲线

Fig.6 微球的VSM曲线

Fig.7 宏观磁性分离实验(a)Fe₃O₄/P(GMA-DVB)-SH-Au分散在水中；(b)外加磁场对微球的吸引

Fig.8 催化反应的UV-vis光谱

Fig.9 ln(C_t/C₀)与催化时间的关系图

Table 1 不同条件下4-NP的降解

Fig.10 Fe₃O₄/P(GMA-DVB)-SH-Au催化的循环实验结果

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