| Summary: | Considering water scarcity, photo-based processes have been presented as a depollution technique, which should be optimized in order to be applied in the future. For that, the addition of an active photocatalyst and the usage of solar radiation are mandatory steps. Thus, Fe<sub>3</sub>O<sub>4</sub>–SiO<sub>2</sub>–TiO<sub>2</sub> was synthesized, and its performance was evaluated using simulated solar radiation and methylene blue as a model pollutant. Under optimal conditions, 86% degradation was attained in 1 h. These results were compared to recent published data, and the better performance can be attributed to both the operational conditions selection and the higher photocatalyst activity. Indeed, Fe<sub>3</sub>O<sub>4</sub>–SiO<sub>2</sub>–TiO<sub>2</sub> was physico-chemically characterized with techniques such as XRD, N<sub>2</sub> isotherms, spectrophotometry, FTIR, electrochemical assays and TEM.
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