The Role of Interphase Interactions in Electrosynthesis of Composites Based of Graphene Oxide and Poly-o-phenylenediamineстатья
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Дата последнего поиска статьи во внешних источниках: 20 марта 2018 г.
Аннотация:The formation of the composite of reduced graphene oxide (RGO) with poly-o-phenylenediamine
(PPD) on the surface of glasses covered with a conducting layer (CL) of SnO2 is studied by the methods of
voltammetry, atomic force microscopy (AFM), electron microscopy (SEM) with energy-dispersive X-ray
spectroscopic (EDXS) microanalysis, and electron spectroscopy, When a CL with deposited graphene oxide
is placed into aqueous solution of o-phenylenediamine (OPD), the monomer is strongly fixed in the GO
matrix, as confirmed by EDXS data. The further redox interaction in the two-phase system GO–OPD initiates
polymerization of OPD in the GO film. When anodic polarization in switched on, the oxidation and the
further polymerization of OPD go on, while GO is reduced to RGO as a result of mediated reaction to yield
the RGO-PPD composite even in the absence of cathodic polarization. The electron spectra of composites
reveal the presence of an absorption band close to absorption of individual PPD. According to AFM and
SEM data, OPD incorporated into the composite structure keeps RGO from being folded in acidic media.
As the time of impregnation increases, the degree of reduction of GO to RGO changes, which is reflected in
the surface morphology and the amount of monomer in the composite (RGO–PPD)-1. The coating
becomes black, which is typical of RGO, and its conductivity increases by 4–5 orders of magnitude.