| Abstract [eng] |
Various technologies are being developed to reduce environmental damage. The development of photoelectrochemical technologies can bring huge economic benefits by using sunlight to increase sustainability of processes such as hydrogen evolution, the decomposition of pollutants and CO2 reduction. In this work, TiO2 and MoS2 are considered as promising photo-electrocatalysts. Electrochemical surface modification methods are cheap and sustainable, hence TiO2 and TiO2-MoSx composite were synthesized by anodization method. Investigation of the morphology and photoelectrochemical properties of the fabricated photoanodes revealed that the formation kinetics and catalytic activity of the TiO2 and TiO2-MoSx coatings differ significantly. Anodization in a solution of 85% glycerol, 0.2 M NH4F, 0.02 M Trilon-B, 0.025 mM (NH4)2MoS4 leads to anodic decomposition of MoS42- and the formation of a MoSx layer on TiO2, which interferes with the formation of the TiO2 nanotubes. The TiO2-MoSx composite generates a higher photocurrent when anodized at voltages above 20 - 40 V. In addition, the efficiency of photocurrent generation increases with increasing anodization voltage. |
