Journal
CERAMICS INTERNATIONAL
Volume 45, Issue 6, Pages 6869-6874Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.ceramint.2018.12.182
Keywords
ZnO-In2O3; n-Butanol; Gas-sensing property; Selectivity
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Funding
- Research Funds for the Central Universities [3122017070]
- Scientific Research Project of Tianjin Education Commission [2018KJ250]
- Tianjin Research Program of Application Foundation and Advanced Technology [16JCQNJC03400]
- National Natural Science Foundation of China [21501196]
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A series of high-response and fast-response/recovery n-butanol gas sensors was fabricated by adding ZnO to In2O3 in varying molar ratios to form ZnO-In2O3 nanocomposites via a facile co-precipitation hydrothermal method. Morphological characterizations revealed that the shape of pure In2O3 was changed from irregular cubes into irregular nanoparticles, 30-50 nm in size, with the addition of ZnO. Compared with the pure In2O3 gas sensor, the ZnO-In2O3 gas sensor exhibits superior n-butanol sensing performance. With the introduction of ZnO, the response of the sensor to n-butanol was improved from 17 to 99.5 at 180 degrees C for a [Zn]: [In] molar ratio of 1:1. In addition, the ZnO-In2O3 gas sensors show a reduced optimal working temperature, excellent selectivity to n-butanol, and good repeatability. The response of the ZnO-enhanced In2O3-based sensors showed a strong linear relationship with the n-butanol gas concentration, allowing for the quantitative detection of n-butanol gas.
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