中国物理B ›› 2016, Vol. 25 ›› Issue (8): 88201-088201.doi: 10.1088/1674-1056/25/8/088201

• INTERDISCIPLINARY PHYSICS AND RELATED AREAS OF SCIENCE AND TECHNOLOGY • 上一篇    下一篇

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

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)   

  1. School of Physics and National Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
  • 收稿日期:2016-01-13 修回日期:2016-04-17 出版日期:2016-08-05 发布日期:2016-08-05
  • 通讯作者: Shi-Shou Kang E-mail:skang@sdu.edu.cn
  • 基金资助:
    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.

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

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)   

  1. School of Physics and National Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
  • Received:2016-01-13 Revised:2016-04-17 Online:2016-08-05 Published:2016-08-05
  • Contact: Shi-Shou Kang E-mail:skang@sdu.edu.cn
  • Supported by:
    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.

摘要: 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.

关键词: trepang-like nanocomposites, core-shell nanoparticles, catalytic property, magnetic property

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.

Key words: trepang-like nanocomposites, core-shell nanoparticles, catalytic property, magnetic property

中图分类号:  (Surface and interface chemistry; heterogeneous catalysis at surfaces)

  • 82.65.+r
81.20.-n (Methods of materials synthesis and materials processing) 68.43.-h (Chemisorption/physisorption: adsorbates on surfaces)