化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (2) : 223-227.

开发与应用

负载Pd蛋黄-蛋壳型磁性碳纳米复合材料Fe₃O₄@C-Pd的制备及其催化性能研究

周云斌, 李敏娜, 居璨, 周林成, 吴琼, 黄峥

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Preparation and catalysis of Pd loaded yolk-shell Fe₃O₄@C-Pd magnetic carbon nanocomposite material

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Received		Published
2017-08-02		2019-02-20
Issue Date	Revised Date
2019-03-18	2017-08-02

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摘要

用氨水做催化剂,利用正硅酸乙酯(TEOS)的溶胶-凝胶化过程和间苯二酚与甲醛的缩聚反应一步合成核壳材料;通过在N₂中碳化并在NaOH溶液中刻蚀SiO₂制得蛋黄-蛋壳型结构纳米微球;最后负载Pd得到磁性碳纳米复合材料Fe₃O₄@C-Pd。采用透射电子显微镜、X射线粉末衍射仪、紫外-可见分光光度计以及振动样品磁强计等手段对所制纳米材料的形貌、组成结构、晶体结构和磁性能进行了分析表征。将Fe₃O₄@C-Pd作为催化剂用于对亚甲基蓝(MB)的催化还原,结果表明其具有良好的催化活性,重复使用4次催化活性几乎保持不变。

Abstract

First,the yolk-shell material was prepared in one step by the sol-gel process of tetraethoxysilane (TEOS) as well as condensation polymerization of resorcinol and formaldehyde,and ammonia used as catalyst.Next,the material was carbonized by N₂,and SiO₂ was etched in the NaOH solution.Pd was loaded on the nanoparticles finally.The morphology,composition,crystal structure and magnetic properties of catalyst were characterized by TEM,XRD,UV-Vis and VSM.The results of methylene blue (MB) reduction showed that the material exhibited good catalytic activity,and it was stable after repeating 4 times.

关键词

磁性 / 蛋黄-蛋壳型 / 纳米复合材料 / 贵金属负载 / 催化还原

Key words

magnetism / yolk-shell type / nanocomposite material / load of precious metal / catalytic reduction

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周云斌, 李敏娜, 居璨, 周林成, 吴琼, 黄峥. 负载Pd蛋黄-蛋壳型磁性碳纳米复合材料Fe₃O₄@C-Pd的制备及其催化性能研究[J]. 化工新型材料, 2019, 47(2): 223-227 DOI:

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