Facile synthesis and electrochemical properties of Prussian Blue/MWCNT and PB/WO3 films

Abstract

In this study, Prussian Blue (PB)/MWCNTs and PB/WO3 nanocomposite films were deposited onto In-SnO2 (ITO) substrates by a simple chemical bath deposition method. The structural, morphological, and electrochemical properties of PB/MWCNTs films were systematically investigated in detail. Removing influence of ITO, it was evident that both of the patterns could be indexed in the cubic PB phase, from X-ray diffraction analysis. While intense tubular carbon and agglomerative formations were detected in PB/MWCNTs films, cubic PB and spherical WO3 forms were depicted in PB/WO3 films. Average particle sizes (D) of MWCNTs (5.8 nm) were smaller than WO3 (10.5 nm) due to improved particle growth process as shown in this work. Raman analysis proved the production of PB structures. Typical Prussian Blue ν(CN) and stretching vibration of Fe-C at 2159 cm-1 and 507 cm-1 were observed, respectively. Improved electrochemical performance of PB/MWCNTs electrodes was indicated compared to PB/WO3 electrodes.