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In2O3 Nanorod Decorated Reduced Graphene Oxide composite as High Response of NOx Gas Sensors at Room Temperature

Abstract

A novel composite room temperature gas sensor based on a In2O3 nanorod decorated reduced graphene oxide composite (In2O3 NR/rGO composite) was successfully synthesized via a facile reflux method. In this synthesis, In3+ and urea were adsorbed on GO through electrostatic interactions in a water solution. The subsequent reflux treatment led to the transformation of the In(OH)3 nanorod coated on GO and also to the reduction of graphene oxide. We demonstrate that it can detect NOx gas with a response of 1.45, fast response time of 25.0 s to 97.0 ppm NOx and a low detection limit of 970 ppb at room temperature. Compared with the pure In2O3 NR, the composite has faster response within 30.0 s in the whole region of NOx concentration. The enhanced sensing properties are attributed to the synergy of the superior conductivity of rGO and the nanostructure of the In2O3 NR/rGO composite. The present strategy for combining various hydroxide and nanoscaled building blocks into integrated 3D structures will open new opportunities for designing and synthesizing multifunctional composite.

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Publication details

The article was received on 25 Mar 2017, accepted on 14 Jun 2017 and first published on 14 Jun 2017


Article type: Paper
DOI: 10.1039/C7NJ00993C
Citation: New J. Chem., 2017, Accepted Manuscript
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    In2O3 Nanorod Decorated Reduced Graphene Oxide composite as High Response of NOx Gas Sensors at Room Temperature

    W. Fang, Y. Yang, Y. Hui, X. Dong, R. Wang, T. T. wang, J. Wang, Z. Liu, B. Zhao and X. Wang , New J. Chem., 2017, Accepted Manuscript , DOI: 10.1039/C7NJ00993C

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