Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 509, Issue 13, Pages 4499-4504Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2010.11.078
Keywords
Zinc oxide; Basic zinc carbonate; Flower-like; Porous; Gas sensor
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Funding
- National Basic Research Program of China (973 Program) [2007CB936602, 2011CB933700]
- Anhui Normal University [2009xqn70, 2009xqn71]
- Anhui provincial natural science [090412036]
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Porous flower-like ZnO nanostructures have been synthesized by a template-free, economical hydrothermal method combined with subsequent calcination. Calcination of the precursors produced flower-like ZnO nanostructures, composed of interconnected porous ZnO nanosheets with high porosity resulting from the thermal decomposition of the as-prepared precursors, i.e., flower-like basic zinc carbonate (BZC). Moreover, the nanostructures have been characterized through X-ray diffraction, thermogravimetric-differential thermalgravimetric analysis, scanning electron microscopy, transmission electron microscopy, and Brunauer-Emmett-Teller N-2 adsorption-desorption analyses. Compared with ZnO nanorods, the as-prepared porous flower-like ZnO nanostructures exhibit a good response and reversibility to some organic gas, such as ethanol and acetone. The sensor responses to 100 ppm ethanol and acetone are 21.8 and 16.8, respectively, at a working temperature of 320 degrees C. In addition, the sensors also exhibited a good response to 2-propanol and methanol, which indicate that these porous flower-like ZnO nanostructures are highly promising for applications of gas sensors. (c) 2011 Published by Elsevier B.V.
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