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Designed synthesis of Co-doped sponge-like In2O3 for highly sensitive detection of acetone gas

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Abstract

Pure and 1–4 mol% cobalt doped indium oxide (Co-doped In2O3) sponge-like microstructures with high specific surface area were fabricated by a simple and environmentally friendly hydrothermal method. The specific surface area and porosity of Co-doped sponge-like In2O3 microstructures can be regulated through the modulation of Co/In molar ratios. The as-prepared sensors based on Co-doped In2O3 exhibit favorable gas sensing properties toward acetone gas; their porous structure can create more adsorption sites for the adsorption of oxygen molecules and the diffusion of the target gas, leading to significant improvement in sensing performance. In particular, 3 mol% Co-doped In2O3 presents the greatest response to acetone vapor at 240 °C, which is about 3.25 times higher than that of pure In2O3. The sensor also exhibits rapid response-recovery time (1.143 s/37.5 s), low detection limit (2.76 at 5 ppm), good reproducibility and high selectivity, making it a promising material for acetone detection.

Graphical abstract: Designed synthesis of Co-doped sponge-like In2O3 for highly sensitive detection of acetone gas

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Publication details

The article was received on 04 Dec 2018, accepted on 18 Jan 2019 and first published on 23 Jan 2019


Article type: Paper
DOI: 10.1039/C8CE02058B
Citation: CrystEngComm, 2019, Advance Article

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    Designed synthesis of Co-doped sponge-like In2O3 for highly sensitive detection of acetone gas

    X. Zhang, D. Song, Q. Liu, R. Chen, J. Liu, H. Zhang, J. Yu, P. Liu and J. Wang, CrystEngComm, 2019, Advance Article , DOI: 10.1039/C8CE02058B

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