Author(s)

Hongjun Wang^*, Xinhua Cao, Fangke Liu, Shupei Guo, Xinxin Ren, Shuming Yang

College of Chemistry and Chemical Engineering, Xinyang Normal University, Xinyang, China.

Transparent nanostructured BaTiO3 film electrodes were synthesized on conductive substrates from BaTiO₃ nanocrystals forming at low temperature. Electrochemical and spectroelectrochemical methods were employed to investigate its properties of band energetics and the trap state at different pH values. The flat band edges greatly depended on the pH value of electrolyte, and the flat band edges were -0.70, -0.92 and -1.20 V vs saturated Ag/AgCl at the pH value of 3.0, 6.8 and 13.0, respectively. The results showed that trap state densities also highly depended on pH. The total trap state densities were 3.73 × 10¹⁵, 4.02 × 10¹⁵ and 6.48 × 10¹⁶ cm^-2 at pH value of 3.0, 6.8 and 13.0 respectively with maximum located at -0.36 V, -0.50 V and -0.80 V. The results obtained from CVs were in good agreement with that obtained from the measurements of time resolved currents. The size of the peak potentials in the cyclic voltammograms experiments was increased dramatically with the pH value increasing, indicating that traps were surface-related.

Nanostructured BaTiO₃ Film, Electrochemistry, Spectroelectrochemistry, Band Energetics, Trap State

Wang, H. , Cao, X. , Liu, F. , Guo, S. , Ren, X. and Yang, S. (2015) Synthesis and Electrochemical Properties of Transparent Nanostructured BaTiO₃ Film Electrodes. Open Journal of Inorganic Chemistry, 5, 30-39. doi: 10.4236/ojic.2015.52005.