Multifunctional magnetic Fe3O4/nitrogen-doped porous carbon nanocomposites for removal of dyes and sensing applications

In this work, a multifunctional magnetic Fe3O4/nitrogen doped-porous carbon nanocomposite (Fe3O4/N-PCNC) with remarkable magnetic, adsorption and catalytic properties was synthesized using naringin as carbon precursor. Characterization studies revealed that Fe3O4/N-PCNC exhibited a mesoporous structure with different functional groups and good magnetic properties. Its applications for the removal of organic dyes as well as the non-enzymatic colorimetric detection of hydrogen peroxide and glucose were investigated. The removal of the organic dyes from water showed that over 99.7% crystal violet and rhodamine B, and 100% thionine with concentrations of ca. 60 mg/L can be removed by Fe3O4/N-PCNC within 15 min. Recovery and recycling studies showed that, after 5 cycles, Fe3O4/N-PCNC, lost only around 2.94%, 3.97% and 3.36% of its initial ability to remove crystal violet, rhodamine B and thionine, respectively. Furthermore, Fe3O4/N-PCNC exhibited intrinsic peroxidase-mimic activity. Fe3O4/N-PCNC was used for colorimetric sensing of hydrogen peroxide and glucose with high sensitivity and low limits of detection of 0.1 µM and 2.6 µM, respectively. The glucose sensor also shows high reproducibility, selectivity and was successfully applied to sense glucose in various drinks. This indicates the promising application potential of Fe3O4/N-PCNC in water treatment, quality analysis and medicine fields. © 2018 Elsevier B.V.

Nsabimana A.1, 2 , Kitte S.A.1, 2, 7 , Wu F.1, 3 , Qi L.1, 2 , Liu Z.1 , Zafar M.N.1, 4 , Luque R. 5, 6 , Xu G.1
  • 1 State Key Laboratory of Electroanalytical Chemistry, Changchun Institute of Applied Chemistry, Chinese Academy of Sciences, Changchun, Jilin 130022, China
  • 2 University of Chinese Academy of Sciences, Chinese Academy of Sciences, No. 19A Yuquanlu, Beijing, 100049, China
  • 3 University of Science and Technology of China, Hefei, China
  • 4 Department of Chemistry, University of Gujrat, Gujrat, Punjab 50700, Pakistan
  • 5 Departamento de Quimica Organica, Universidad de Cordoba, Campus de Rabanales, Edificio Marie Curie (C-3), Ctra Nnal IV-A, Km 396, Cordoba, E14014, Spain
  • 6 Peoples Friendship University of Russia (RUDN University), 6 Miklukho-Maklaya St., Moscow, 117198, Russian Federation
  • 7 Jimma University, College of Natural Sciences, Department of Chemistry, P.O.Box 378, Jimma, Ethiopia
Adsorbent; Glucose; Hydrogen peroxide; Magnetic Fe3O4/carbon nanocomposite; Organic dye; Peroxide-like mimic
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