The widespread use of fossil fuels tied to industrial development over the last century and the growth of the world population have led to the release of significant amounts of carbon dioxide (CO2) into the atmosphere, contributing to damage the ecosystem. One of the solutions that has attracted researchers in recent years is the photocatalytic reduction of CO2, a process that converts CO2 into value-added chemicals and solar fuels (such as CO, HCOOH, CH3OH, CH4). This process is particularly interesting when solar light is used to activate the photocatalyst. The latter is usually a semiconductor, whereby absorbing light of proper energy electrons are promoted from the valence band to the conduction band leaving holes in the valence band.