The Preparation of Stable TiO2 Nanotubes Supported Gold Catalysts and Their Catalytic Performance for CO Oxidation

Hydrogen titanate nanotubes can be turned into thermally stable TiO2 nanotubes by a sol-gel impregnation method. Gold is deposited on such stable TiO2 nanotubes via a deposition-precipitation process. The prepared materials are characterized with powder X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), transmission electron microscopy (TEM), high-resolution transmission electron microscopy (HRTEM) and nitrogen adsorption. Their catalytic performances for low-temperature CO oxidation are studied. Compared with the hydrogen titanate nanotubes supported gold catalyst, such stable TiO2 nanotubes supported gold catalysts show better catalytic performance.