title: A Novel Nanofilm Sensor Based on Poly-(Alizarin Red)/Fe3O4 Magnetic Nanoparticles-Multiwalled Carbon Nanotubes Composite Material for Determination of Nitrite.
abstract: Fe3O4 magnetic nanoparticles were synthesized by chemical co-precipitation with sodium citrate as surfactant and were characterized by FT-IR spectrometer, X-ray diffraction and transmission electron microscopy. A novel nitrite sensor was fabricated by electropolymerization of alizarin red on the surface of glassy carbon electrode modified with Fe3O4-multiwalled carbon nanotubes composite nanofilm. Under the optimal experimental conditions, it was showed that the proposed sensor exhibited good electrocatalytic activity to the oxidation of nitrite, and the peak current increased linearly with the nitrite concentration from 9.64 x 10(-6) mol x L(-1) to 1.30 x 10(-3) mol x L(-1) (R = 0.9976) with a detection limit of 1.19 x 10(-6) mol x L(-1) (S/N = 3). This sensor showed excellent sensitivity, wide linear range, stability and repeatability for nitrite determination with potential applications.
authors.forename: Jianying
authors.initials: J
authors.lastname: Qu
authors.forename: Ying
authors.initials: Y
authors.lastname: Dong
authors.forename: Wang
authors.initials: W
authors.lastname: Yong
authors.forename: Tongfang
authors.initials: T
authors.lastname: Lou
authors.forename: Xueping
authors.initials: X
authors.lastname: Du
authors.forename: Jianhang
authors.initials: J
authors.lastname: Qu
mesh_terms: D000880:Anthraquinones / Q000737:chemistry*; D052203:Ferrosoferric Oxide; D008280:Magnetics; D049329:Nanostructures; D037742:Nanotubes, Carbon; D009573:Nitrites / Q000032:analysis*; D017550:Spectroscopy, Fourier Transform Infrared; D014961:X-Ray Diffraction
chemical_list: D000880:Anthraquinones; D037742:Nanotubes, Carbon; D009573:Nitrites; C010078:alizarin; D052203:Ferrosoferric Oxide