Today’s world is seeking green energy production in order to minimize the impact on the environment and climate. Using photocatalysts and the suns power to from high-energy moieties is a way to produce this green fuels.

 Strontium titanate (SrTiO3) is a perovskite semiconductor that has photocatalytic properties. Under illumination of sunlight, it is proven to split water into hydrogen and oxygen, while the structure on the nanoscale can be of importance of the electron-hole separation. It is also shown that chloride ions in the solution have a positive effect on the water-splitting capabilities of SrTiO3. This master thesis focusses on the effect of structure of SrTiO3 (using different synthetic routes to make nanoparticles), as well as the effect of Cl- ions in the solution.