Preparation and characterization of Mn2O3/TiO2 nanomaterials synthesized by combination of CVC and impregnation method with different Mn loading concentration

TiO2 nanomaterials were synthesized by a chemical vapor condensation and loaded with 2–10 wt% manganese by impregnation. Thermally treated particles were characterized by XRD and EXAFS. Particles with 5 wt% Mn content showed the most dispersed Mn components in the supported TiO2 with the lowest crystallinity. BET and HR-TEM showed that their surface area and pore volume increased to 299.5 m2 g−1 and 0.329 cm3 g−1, respectively. TPR and XPS showed these particles to have higher oxygen mobility and redox properties than commercial P25 similarly prepared and loaded with 5 wt% Mn2O3. They also had greater amounts of Mn3+ groups on their surfaces. 5 wt% manganese loaded TiO2 particles fabricated by CVC and impregnation are expected to have broad applicability.

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► MnOx/TiO2 materials synthesized by impregnation through chemical vapor condensation.
► Mn2O3/TiO2 has large surface areas, highly Mn3+ content and good dispersion.
► Mn/CVCTi5 contained the most dispersed Mn and improves the catalytic properties.