**6. Conclusion**

In this chapter, an overview of the development of supported catalysts and their prospects from a scientific point of view is presented. We can see that the field has experienced major advances in the last 5 years, especially in the area of supported TiO2, ZnO, WO3, SnO2, and mixed oxides on several types of substrates (SSWM, quartz, glass (ITO)). Based on the literature presented here, we believe that there is still quite a lot that can be achieved in improving the performance of supported catalysts for photocatalytic applications.
