Fotokatalytická generace H2 z vodného roztoku metanolu v přítomnosti fotokatalyticky aktivních materiálů

Abstract

This bachelor’s thesis deals with the photocatalytic production of hydrogen from water using metal–organic framework (MOF)-based materials. The theoretical part focuses on heterogeneous photocatalysis, water splitting, and the properties of the MIL-125 material. The experimental part is devoted to the evaluation of the photocatalytic activity of the prepared samples during hydrogen production under UV irradiation. At the same time, the correlation between photocatalytic activity and the physicochemical properties of the materials was investigated. The prepared samples were characterized using XRD, SEM, EDS, DRS, and FTIR methods. The results showed that the prepared materials do not represent a pure MIL-125 phase, but rather multiphase systems containing anatase TiO2 and other secondary phases. DRS analysis confirmed a reduction in band gap values after modification with metal oxides. FTIR analysis revealed differences in the amount of residual DMF among the individual samples. The highest photocatalytic activity was achieved for the CuO-MIL-125(Ti) sample. All prepared materials exhibited higher photocatalytic activity than the commercial TiO2 photocatalyst (Evonik P25).