Journal
CRYSTENGCOMM
Volume 14, Issue 19, Pages 6264-6270Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2ce25788b
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Funding
- Startup Fund for Distinguished Scholars [35211103, 33211103]
- National Natural Science Foundation of China [51072071, 51102117]
- China Postdoctoral Science Foundation [2011M500085]
- Jiangsu Postdoctoral Science Foundation [1102001C]
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Co3O4 mesocrystals with concave octahedral structures were successfully prepared by a facile, polymer-mediated route. The Co3O4 mesocrystals are obtained from the oriented aggregation of primary nanocrystals from their six identical [100] directions. After a thorough investigation of their structure as a function of the adopted preparation parameters such as reaction time and the amount of polymer, the gas sensing performance of the Co3O4 mesocrystals was studied with formaldehyde and ethanol as probe analytes. It was found that they show high sensitivity and good response and recovery characteristics. As compared with Co3O4 powder, the Co3O4 mesocrystals exhibit 1.8-fold and 1.4-fold enhancement in gas responses to 100 ppm of formaldehyde and ethanol, respectively.
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