Studies on photoelectrochemistry of nano-particulate TiO2/PANI/PATP film on Au electrodes

New multi-layer film electrodes have been investigated for solar energy conversion applications. Nano-particulate PANI(polyaniline)/PATP (p-aminothiophenol) films and TiO2/PANI/PATP films on Au electrodes were obtained by electrochemical methods. The cathodic and anodic photocurrents were observed in different potential regions for the PANI/PATP/Au film and the TiO2/PANI/PATP/Au film. Both films were characterized by recording their photocurrent spectra at different electrode potentials. The wavelength region of the photocurrent generated in TiO2/PANI/PATP/Au film covers violet and red light regions. The size of TiO2 nanoparticles was controlled using high resolution SEM imaging. The mechanism of photocurrent generation has been evaluated