We developed a composite consisting of mesoporous ZrO2 thin films supporting catalytically active gold nanoparticles (Au NPs) for the oxidative removal of carbon monoxide (CO). At first, highly ordered mesoporous ZrO2 (m-ZrO2) thin films are prepared by sol-gel-based spin-coating process followed by a controlled thermal treatment process in air. Then, Au NPs are successfully dispersed and deposited over the entire framework of mesoporous ZrO2 thin films to form Au/m-ZrO2 films. The specific surface area and crystallinity of the m-ZrO2 thin films as well as the periodicity of the mesoporous framework can be controlled by adjusting the calcination temperature and the synthetic parameters. The catalytic efficiency of the optimized Au/m-ZrO2 composite film toward CO conversion reaches 94% of circulation time, and is well-retained even after 1 h (∼88%).
Bibliographical noteFunding Information:
This work was partly supported by the Australian Research Council Future Fellow ( FT150100479 ) and JSPS KAKENHI . The authors extend their appreciation to the International Scientific Partnership Program (ISPP) at King Saud University (KSU) for funding this research work through ISPP-66. The project was also supported by the National Natural Science Foundation of China ( 61604070 ) and the National Natural Science Foundation of Jiangsu Province ( BK20161000 ). This work was performed in part at the Queensland node of the Australian National Fabrication Facility, a company established under the National Collaborative Research Infrastructure Strategy to provide nano- and micro-fabrication facilities for Australia's researchers.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials