One-step synthesis and properties of MnOx/TiO2 nanocomposites prepared by chemical vapor condensation process

MnOx/TiO2 nanocomposites were synthesized using metal-organic precursors in one-step by modified chemical vapor condensation. The flow rate of manganese precursor was supplied from 0.1 to 0.6 L min− 1. The titanium tetraisopropoxide precursor was supplied at a constant flow rate. The synthesized materials were characterized by TGA-DTG, BET, TEM, XRD, and XPS. The result of TGA showed the Mn precursor's main degradation to be above 100 °C. Characterization of the Mn/TiO2 samples by BET and TEM showed that the flow rate of Mn precursor had little effect on surface area, pore volume, or particle size. XRD showed that amorphous Mn became crystalline with increasing Mn precursor vapor concentration.

The Mn/TiO2 nanocomposites materials, successfully synthesized by one-step modified chemical vapor condensation method. The Mn/TiO2 nanocomposites showed well dispersed MnOx on TiO2 surfaces, no pore blocking and low agglomeration. Consequently, such synthesized Mn/TiO2 nanocomposites are promising catalysts with broad expected applicability.Figure optionsDownload as PowerPoint slideHighlights
► MnOx/TiO2 was synthesized by a modified chemical vapor condensation route.
► The MnOx/TiO2 had high surface areas, abundant hydroxyl groups and good dispersion.
► The MnOx/TiO2 showed reduced sintering and pore blocking.