Synthesis of highly crystalline photocatalysts based on TiO2 and ZnO for the degradation of organic impurities under visible-light irradiation

摘要: A TiO2–ZnO binary oxide system (with molar ratio TiO2:ZnO = 8:2) was synthesized by a hydrothermal method, assisted calcination at temperatures of 500, 600 and 700 °C, using zinc citrate as the precursor ZnO. The morphology (SEM, TEM), crystalline structure (XRD, Raman spectroscopy), diffuse reflectance spectra (DRS), chemical surface composition (EDXRF), porous parameters (low-temperature N2 sorption) characteristic functional groups (FT-IR) materials were comprehensively analyzed. novelty this work is observation coexistence structures anatase ZnTiO3 in materials. Moreover, it shown that obtained absorb visible radiation. key stage study evaluation photocatalytic activity systems degradation model organic pollutants: C.I. Basic Red 1, Violet 10, Blue 3 4-nitrophenol. For all materials, high efficiency impurities demonstrated. results show products may be interest for use pollutants. kinetics selected compounds determined based on Langmuir–Hinshelwood equation, assuming pseudo-first-order (PFO) reaction.