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.

TiO2 nanotubes, supported gold catalyst, sol-gel impregnation, CO oxidation

Department of Chemistry, TKL of Metal- and Molecule-Based Material Chemistry and Key Laboratory of Advanced Energy Materials Chemistry (MOE), Nankai University, Tianjin 300071, China