• 文献标题:   Green synthesis of reduced graphene oxide/Fe3O4/Ag ternary nanohybrid and its application as magnetically recoverable catalyst in the reduction of 4-nitrophenol
  • 文献类型:   Article
  • 作  者:   THU TV, KO PJ, NGUYEN TV, VINH NT, KHAI DM, LU LT
  • 作者关键词:   4nitrophenol, graphene oxide, magnetic nanoparticle, nanocatalyst, silver
  • 出版物名称:   APPLIED ORGANOMETALLIC CHEMISTRY
  • ISSN:   0268-2605 EI 1099-0739
  • 通讯作者地址:   Duy Tan Univ
  • 被引频次:   10
  • DOI:   10.1002/aoc.3781
  • 出版年:   2017

▎ 摘  要

Materials having both magnetic and catalytic properties have shown great potential for practical applications. Here, a reduced graphene oxide/iron oxide/silver nanohybrid (rGO/Fe3O4/Ag NH) ternary material was prepared by green synthesis of Ag on pre-synthesized rGO/Fe3O4. The as-prepared rGO/Fe3O4/Ag NH was characterized using Fourier transform infrared spectroscopy, X-ray diffractometry, Raman spectroscopy, vibrating sample magnetometry, transmission electron microscopy and energy-dispersive X-ray spectroscopy. rGO sheets were covered with Fe3O4 (8-16nm) and Ag (18-40nm) nanoparticles at high densities. The mass percentages were 13.47% (rGO), 62.52% (Fe3O4) and 24.01% (Ag). rGO/Fe3O4/Ag NH exhibited superparamagnetic behavior with high saturated magnetization (29emu g(-1) at 12kOe), and efficiently catalyzed the reduction of 4-nitrophenol (4-NP) with a rate constant of 0.37min(-1), comparable to those of Ag-based nanocatalysts. The half-life of 4-NP in the presence of rGO/Fe3O4/Ag NH was ca 1.86min. rGO/Fe3O4/Ag NH could be magnetically collected and reused, and retained a high conversion efficiency of 94.4% after the fourth cycle. rGO/Fe3O4/Ag NH could potentially be used as a magnetically recoverable catalyst in the reduction of 4-NP and environmental remediation.