Characterization and catalytic performance of TiO2 nanotubes-supported gold and copper particles

TiO2 nanotubes are prepared via the reaction of anatase TiO2 powder with NaOH solution. Gold and gold–copper supported on TiO2 nanotubes (Au/TiO2 NTs and Au–Cu/TiO2 NTs) are synthesized by deposition–precipitation method. The prepared materials are characterized with BET, powder X-ray diffraction (XRD), transmission electron microscopy (TEM) and high-resolution transmission electron microscopy (HRTEM). Their catalytic performance for low-temperature CO oxidation is studied by using a microreactor–GC system. The influence of support, pH of HAuCl4 solution, calcination temperature and atmosphere as well as gold content on the catalytic performance of Au/TiO2 NTs are investigated. Compared with Au/TiO2 NTs, the catalytic performance of Au–Cu/TiO2 NTs is better.

Gold and gold–copper supported on TiO2 nanotubes are synthesized by deposition–precipitation method. The influence of preparation conditions as well as gold content on the catalytic performance of the modified nanotubes is investigated. After copper is added, the modified nanotubes show better catalytic performance. Figure optionsDownload as PowerPoint slide