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Issue 53, 2017, Issue in Progress
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Highly active and porous single-crystal In2O3 nanosheet for NOx gas sensor with excellent response at room temperature

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Abstract

Porous single-crystal In2O3 nanosheet (ps-In2O3 NS) was designed and prepared through a method of calcination after liquid reflux. Compared with the other In2O3 with different surface morphologies, the ps-In2O3 NS has gas sensing properties towards NOx at room temperature. Gas sensing data strongly demonstrate that this porous single-crystal In2O3 nanosheet exhibits a distinguished response (89.48) and fast response time (16.6 s) to 97.0 ppm NOx. Meanwhile, the ps-In2O3 NS sensor presents a favorable linearity and good selectivity, and the detection of NOx is down to ppb levels at room temperature. The enhancement of the sensing response is attributed to the porous, single-crystal and two dimensional nanosheet structure of the synthesized ps-In2O3 NS, which has much higher BET surface area, effective gas diffusion of slit pores and thus provides more active sites for the reaction of NOx with surface-adsorbed oxygen ions. This work would be important for the low-cost and high performance of the In2O3 material with highly promising applications in gas sensors.

Graphical abstract: Highly active and porous single-crystal In2O3 nanosheet for NOx gas sensor with excellent response at room temperature

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Publication details

The article was received on 14 May 2017, accepted on 26 Jun 2017 and first published on 03 Jul 2017


Article type: Paper
DOI: 10.1039/C7RA05446G
Citation: RSC Adv., 2017,7, 33419-33425
  • Open access: Creative Commons BY license
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    Highly active and porous single-crystal In2O3 nanosheet for NOx gas sensor with excellent response at room temperature

    L. Sun, W. Fang, Y. Yang, H. Yu, T. Wang, X. Dong, G. Liu, J. Wang, W. Yu and K. Shi, RSC Adv., 2017, 7, 33419
    DOI: 10.1039/C7RA05446G

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