期刊
JOURNAL OF MATERIALS CHEMISTRY
卷 21, 期 6, 页码 1874-1879出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c0jm02832k
关键词
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资金
- Chinese Academy of Sciences, China
- Key Laboratory of Cigarette Smoke of State Tobacco Monopoly Administration, Technical Center of Shanghai Tobacco Corporation [K2010-106]
- Chinese Academy of Sciences
- National Basic Research Program of China [2007CB936603]
- National Natural Science Foundation of China [10635070]
Cocoon-like Au/La2O3 nanomaterials, consisting of numerous intertwined La2O3 nanowires having a diameter of about 15-20 nm, have been prepared through calcining Au modified La(OH)(3) precursors. The structure was carefully characterized by SEM (scanning electronic microscopy), TEM (transmission electron microscopy) and XRD (X-ray diffractometry). Au nanoparticles with crystallite sizes about 30 nm were uniformly entangled by the nanowires. The catalytic activities of cocoon-like La2O3 supported nano-gold catalysts were thoroughly demonstrated. In contrast to La2O3 nanomaterials, the obtained Au/La2O3 nanomaterials present excellent cataluminescence behavior (that is, much higher intensity and signal/noise values, and much faster response and recovery time) to volatile organic compounds, such as tetrahydrofuran, acetone, ethanol, benzene, chloroform and chlorobenzene.
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