engleski

Photoelectrochemical properties of nano- composites containing TiO2/SnS2 and TiO2/SnS2/rGO heterojunctions

Titanium dioxide has gained a lot of attention in the field of photocatalysis because of its low cost, environmental friendliness, light corrosion resistance, and high stability. However, it is not effective in utilization of visible light and therefore significant efforts have been done to improve it through TiO2 doping or TiO2 composite formation. One of the composites suitable for visible light utilization is TiO2/SnS2 [1] and therefore the aim of this work was to investigate its photoelectrochemical properties. It is expected that this heterojunction catalyst not only increases visible light absorption but also decreases charge recombination. Additionally, charge recombination can be decreased by GO/rGO incorporation within the photocatalyst (TiO2/SnS2/rGO). Tuneable bang gap and band energy level of GO/rGO, which depends on its size and chemical composition, enables its fine adjustment to energy levels of oxides [2] improving the overall activity of photocatalyst. In this work, good sensitivity of photocatalyst was shown by monitoring open circuit potential in chopped light irradiation and by comparing EIS response in dark to the one under light irradiation. The photoelectrochemical activity was monitored by using linear polarisation and bend energy position was determined by Mott Schottky analysis.

photocatalysis ; water treatment ; nanocomposite ; solar irradiation

nije evidentirano