Preparation And Application Of Multiwall Carbon Nanotubes/Selenium Nanoparticles Modified Electrode

Nanomaterials frequently display unusual physical and chemical properties. These advantages make them widely use in chemical/biosensor. Electrocatalysis can be considered as one of the most popular application of selemium nanoparticles and carbon nanotubes (CNTs). In this paper, the potential applications of MWCNTs/Se modified electrode in biological electrocatalytic were investigated and discussed. New chemical/biosensors have been develop and designed, which make high theoretical meanings and application values to exploit applications of nanomaterials. The main results are shown as follows:(1)The structure and the excellent electrochemical property of selemium nanoparticles and carbon nanotubes were introduced, respectively. A brief review for the applications of nanomaterials had been presented. The main topics included the applications of carbon nanotubes and nanoparticles modified electrodes in biological electroanalysis.(2) The MWCNTs/Se/GC electrode was fabricated and investigate. The MWCNTs/Se composites were firstly prepared by the chemistry sediment methodeand using the carbon nanotubes as the carrier. The composite particles obtained were characterized by FT-IR spectroscopy, X-ray powder diffraction(XRD) and Transmission electron microscopy(TEM); then as the modified material (MWCNTs/Se composites), they were dipped on the glassy carbon electrode to prepare chemical modified electrode. The electrochemical behaviors of MWCNTs/Se/GC electrode was studied by cyclic voltammetry using probe molecule Fe(CN)₆^3-. Compared with bare GC and MWCNTs/GC electrodes, higher electroactive surface was found on MWCNTs/Se/GC electrode.(3) The electrochemical characteristics of selenocystine(SeCys) on MWCNTs/Se/GC electrode were studied.The results showed MWCNTs/Se has promotion effects on the direct electron transfer of SeCys.Cyclic voltammetric results showed a pair of well-defined redox peaks,which corresponded to the direct electron transfer of...