Novel Fe3O4@SiO2@Ag@Ni trepang-like nanocomposites: High-efficiency and magnetic recyclable catalysts for organic dye degradation

doi:10.1088/1674-1056/25/8/088201

Abstract A facile step-by-step approach is developed for synthesizing the high-efficiency and magnetic recyclable Fe₃O₄@SiO₂@Ag@Ni trepang-like nanocomposites. This method involves coating Fe₂O₃ nanorods with a uniform silica layer, reduction in 10% H₂/Ar atmosphere to transform the Fe₂O₃ into magnetic Fe₃O₄, and finally depositing Ag@Ni core-shell nanoparticles on the L-lysine modified surface of Fe₃O₄@SiO₂ nanorods. The fabricated nanocomposites are further characterized by x-ray diffraction, transmission electron microscopy, scanning electron microscope, Fourier transform infrared spectroscopy, and inductively coupled plasma mass spectroscopy. The Fe₃O₄@SiO₂@Ag@Ni trepang-like nanocomposites exhibit remarkably higher catalytic efficiency than monometallic Fe₃O₄@SiO₂@Ag nanocomposites toward the degradation of Rhodamine B (RhB) at room temperature, and maintain superior catalytic activity even after six cycles. In addition, these samples could be easily separated from the catalytic system by an external magnet and reused, which shows great potential applications in treating waste water.

Keywords: trepang-like nanocomposites core-shell nanoparticles catalytic property magnetic property

Received: 13 January 2016
Revised: 17 April 2016
Accepted manuscript online:

PACS:	82.65.+r	(Surface and interface chemistry; heterogeneous catalysis at surfaces)
	81.20.-n	(Methods of materials synthesis and materials processing)
	68.43.-h	(Chemisorption/physisorption: adsorbates on surfaces)

Fund: Project supported by the National Basic Research Program of China (Grant No. 2015CB921502), the National Natural Science Foundation of China (Grant Nos. 11474184 and 11174183), the 111 Project (Grant No. B13029), and the Fundamental Research Funds of Shandong University, China.

Corresponding Authors: Shi-Shou Kang
E-mail: skang@sdu.edu.cn

Cite this article:

Chao Li(李超), Jun-Jie Sun(孙俊杰), Duo Chen(陈铎), Guang-Bing Han(韩广兵), Shu-Yun Yu(于淑云), Shi-Shou Kang(康仕寿), Liang-Mo Mei(梅良模) Novel Fe₃O₄@SiO₂@Ag@Ni trepang-like nanocomposites: High-efficiency and magnetic recyclable catalysts for organic dye degradation 2016 Chin. Phys. B 25 088201

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Novel Fe3O4@SiO2@Ag@Ni trepang-like nanocomposites: High-efficiency and magnetic recyclable catalysts for organic dye degradation

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Novel Fe₃O₄@SiO₂@Ag@Ni trepang-like nanocomposites: High-efficiency and magnetic recyclable catalysts for organic dye degradation