Due to the growing population and the need for industrialization for more comfortable life caused by consumerism, various industrial plants and companies release waste into the environment. By using pesticides, pharmaceuticals, plastics, as well as other pollutants that are not biodegradable, we disturb the natural balance while destroying the environment we live. It is necessary to find the most effective way to remove micro-pollutants. One of the more modern ways of removing micro-pollutants are advanced oxidation processes, specifically in this case photocatalysis. In this paper, photocatalysis was performed as a method for removing salicylic acid from water. Photocatalysis is a process in which, using UV radiation and photocatalysts, hydroxyl radicals are formed that participate in the decomposition of organic micro-pollutants. Graphene oxide was added to improve the photocatalytic properties of TiO2. To compare the effect of graphene oxide on photocatalytic properties, two types of glass fiber meshes were prepared. The first mesh contains the photocatalyst TiO2, and the second TiO2 in combination with graphene oxide. Photocatalytic properties before aging and after 6 months of aging in water and air were studied. The test results show that photocatalysts "wear out" with aging, ie their photocatalytic ability to decompose salicylic acid in water decreases. The obtained results show that the better photocatalyst is pure TiO2.