Fast response and low temperature sensing of acetone and ethanol using Al-doped ZnO microrods

Sinha, Madhumita; Mahapatra, Rajat; Mondal, Manhas Kumar; Krishnamurthy, Satheesh and Ghosh, Ranajit (2020). Fast response and low temperature sensing of acetone and ethanol using Al-doped ZnO microrods. Physica E: Low-dimensional Systems and Nanostructures, 118, article no. 113868.

DOI: https://doi.org/10.1016/j.physe.2019.113868

Abstract

We report low temperature acetone and ethanol sensing properties of Al-doped ZnO microrods synthesized using hydrothermal technique. We observe the acetone detection at room temperature as well as ethanol and acetone detection at low temperature of 150 °C using Al-doped ZnO microrods. 3 wt% Al-doped ZnO microrods sensor exhibits the highest response of 231 toward 8100 parts per million (ppm) of ethanol at 150 °C. The response & recovery time are found to be ultrafast of 60 ms & 870 ms for ethanol and 110 ms & 330 ms for acetone of the Al-doped ZnO microrods at an operating temperature of 150 °C, respectively. In addition, sensing mechanism has explained to illuminate the improved sensing performances of Al-doped ZnO microrods. Thus it is revealed that Al-doped ZnO microrods are promising as an ultrafast gas sensor.

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