2D-MoO3 nanosheets for superior gas sensors

Fangxu Ji; Xianpei Ren; Xiaoyao Zheng; Yucheng Liu; Liuqing Pang; Jiaxing Jiang; Shengzhong (Frank) Liu

doi:10.1039/C6NR00880A

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2D-MoO₃ nanosheets for superior gas sensors†

Fangxu Ji,^a Xianpei Ren,^a Xiaoyao Zheng,^a Yucheng Liu,^a Liuqing Pang,^a Jiaxing Jiang^a and Shengzhong (Frank) Liu*^ab

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* Corresponding authors

^a Key Laboratory of Applied Surface and Colloid Chemistry, National Ministry of Education; Shaanxi Engineering Lab for Advanced Energy Technology; School of Materials Science and Engineering, Shaanxi Normal University, Xi'an 710119, China
E-mail: szliu@dicp.ac.cn
Tel: +86-29-8153-0785

^b Dalian Institute of Chemical Physics, iChEM, Dalian National Laboratory for Clean Energy, Chinese Academy of Sciences, Dalian, China

Abstract

By taking advantages of both grinding and sonication, an effective exfoliation process is developed to prepare two-dimensional (2D) molybdenum oxide (MoO₃) nanosheets. The approach avoids high-boiling-point solvents that would leave a residue and cause aggregation. Gas sensors fabricated using the 2D-MoO₃ nanosheets provide a significantly enhanced chemical sensor performance. Compared with the sensors using bulk MoO₃, the response of the 2D-MoO₃ sensor increases from 7 to 33; the sensor response time is reduced from 27 to 21 seconds, and the recovery time is shortened from 26 to 10 seconds. We attribute the superior performance to the 2D-structure with a much increased surface area and reactive sites.

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Article information

DOI: https://doi.org/10.1039/C6NR00880A
Article type: Paper
Submitted: 31 Jan 2016
Accepted: 12 Mar 2016
First published: 16 Mar 2016

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Nanoscale, 2016,8, 8696-8703

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2D-MoO₃ nanosheets for superior gas sensors

F. Ji, X. Ren, X. Zheng, Y. Liu, L. Pang, J. Jiang and S. (. Liu, Nanoscale, 2016, 8, 8696 DOI: 10.1039/C6NR00880A

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