Abstract
The electrical behavior of a supported inorganic film (hydrogen uranyl phosphate or UPP) in contact with electrolytes containing inorganic precipitate generating ions was studied by ac and dc measurements. The equivalent circuit for the system UO2(NO3)2/UPP film/H2O3PC6H5was determined by impedance spectroscopy. This technique permits us to obtain three different electrical contributions for the whole system: (i) film/electrolytes interface; (ii) bulk film; (iii) electrolyte solutions. Film and interface electrical parameters, such as the film resistence and capacitance (RfandCeqf), the charge transfer resistance (Rct), and double layer capacitance (Ceqdl), were obtained for different concentrations of the external solutions. For comparison, measurements with the same electrolytes at both sides of the UPP film were also made. From dc measurements the asymmetry of the current–voltage curves, depending on the polarity of the external voltage applied to the system, was also obtained. This asymmetry can be taken as a measure of the film efficiency for electric current rectification. Concentration dependence for thei–vcurves was also considered.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
