Silver nanoparticles modified mesoporous titanosilicate materials for high oxidation of carbon monoxide

This paper investigates a new path to synthesis an ordered nanostructured mesoporous titanosilicate by the assembly of preformed titanosilicate (MTS-9) precursors with triblock copolymers. Silver nanoparticles (AgNPs) with different loadings are supported on MTS-9 composite by two different methods: Deposition Precipitation with Urea (DPU) and Impregnation Reduction with Citrate (IRC). The structure and active component of catalysts were confirmed trough N 2 adsorption‐desorption, X‐ray diffraction (XRD), scanning electron microscopy (SEM), and high‐resolution transmission electron microscopy (HRTEM). The influence of catalytic activity of AgNPs supported on MTS-9 has been evaluated in the oxidation of Carbon monoxide (CO). The obtained results emphasize on the improvement of catalytic activity of MTS-9 by AgNPs. A total of CO-oxidation up to 100% was achieved at 240 °C for the catalyst prepared by impregnation reduction with citrate. Indeed, the 0.5% Ag/MTS-9 (IRC) catalyst exhibited a high stability after four continuous runs. Overall, this catalyst could be very suitable for oxidation of carbon monoxide industrial process.