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Issue 20, 2017
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Three-dimensional flower-like Mg(OH)2@MoS2 nanocomposite: fabrication, characterization and high-performance sensing properties for NOx at room temperature

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Abstract

A three-dimensional (3D) flower-like hierarchical Mg(OH)2@MoS2 nanocomposite was fabricated using ordinary hydrothermal technology. On adjusting the ratio of MoS2 and Mg(OH)2, the morphology could be readily controlled. The Mg(OH)2@MoS2 nanocomposite comprises Mg(OH)2 nanosheets (NSs), which serve as an alkaline center and benefit the adsorption and diffusion of acidic NOx gas. In addition, the 3D hierarchical 2-Mg-MoS2 (the content of MoS2 in Mg(OH)2@MoS2 is 33.3 mol%) is not only beneficial for NOx adsorption on the surface but also strengthens the interaction between the target gas molecules and the active sites. As a result, 2-Mg-MoS2 exhibits excellent sensing properties; its response to 100 ppm NOx could reach 4.73, and the response time was 3 s. In addition, the detection limit of 2-Mg-MoS2 is 0.1 ppm at room temperature (RT). These results demonstrate that this nanocomposite shows outstanding selectivity and stability at RT. This 2-Mg-MoS2 sensor has significant implications for monitoring polluted air.

Graphical abstract: Three-dimensional flower-like Mg(OH)2@MoS2 nanocomposite: fabrication, characterization and high-performance sensing properties for NOx at room temperature

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Publication details

The article was received on 07 Jul 2017, accepted on 03 Sep 2017 and first published on 04 Sep 2017


Article type: Paper
DOI: 10.1039/C7NJ02447A
Citation: New J. Chem., 2017,41, 12071-12078
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    Three-dimensional flower-like Mg(OH)2@MoS2 nanocomposite: fabrication, characterization and high-performance sensing properties for NOx at room temperature

    J. Kang, M. Ikram, Y. Zhao, J. Zhang, A. Ur Rehman, L. Gong and K. Shi, New J. Chem., 2017, 41, 12071
    DOI: 10.1039/C7NJ02447A

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