Journal
JOURNAL OF MATERIALS CHEMISTRY A
Volume 3, Issue 24, Pages 12796-12803Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c5ta01108f
Keywords
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Funding
- National Basic Research Program of China [2011CBA00508]
- National Natural Science Foundation of China [21171142, 21473146, 21333008]
- program for New Century Excellent Talents in University [NCET-11-0294]
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Shape-controllable porous, hollow metal oxide cages are attracting more and more attention due to their widespread applications. In this paper, octahedral, truncated octahedral and cubic Cu2O/CuO cages were successfully fabricated by the thermal decomposition of the polyhedral crystals of Cu-based metal-organic frameworks (Cu-MOFs) as self-sacrificial templates at 300 degrees C. The morphology of the Cu-MOF polyhedral precursors was well tuned by using lauric acid as the growth modulator under solvothermal conditions. Gas-sensing measurements revealed that the octahedral Cu2O/CuO cages exhibited a gas-sensing performance far better than those exhibited by truncated octahedral and cubic cages, which is attributed to the cooperative effect of the large specific surface area (150.3 m(2) g(-1)) and high capacity of surface-adsorbed oxygen of the octahedral Cu2O/CuO cages.
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