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Issue 105, 2016, Issue in Progress
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One-step synthesis of hierarchical Ni–Fe–Al layered double hydroxide with excellent sensing properties for NOx at room temperature

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Abstract

In this paper, hierarchical flower-like Ni–Al-layered double hydroxide (NA-LDH) and Ni–Fe–Al-layered double hydroxide (NFA-LDH) intercalation compounds were synthesized by a facile one-step hydrothermal method using sodium dodecyl sulfate (SDS) as the intercalation layer and template. The NFA-LDHs with a Ni : Fe : Al molar ratio of 1 : 1 : 1 (NFA 1-1), which have porous hierarchical nanostructures and channels between the layers, provided the channels with fast carrier transportation and gas adsorption–desorption. Therefore, NFA 1-1 showed good sensing properties at 100 ppb for the detection of NOx at room temperature, and the response toward 100 ppm NOx was 82%, which was 2.3 times higher than that of pure NA-LDHs at room temperature. NFA-LDHs might be promising compounds for high performance gas sensing for commercial application. The enhanced gas sensing of NFA 1-1 can be ascribed to the unique hierarchical porous structure and the highly oriented layered single crystal structure and composition, which can enhance conductivity/carrier densities, fast carrier transportation and gas adsorption–desorption, and provide a large number of active sites for surface contact reactions.

Graphical abstract: One-step synthesis of hierarchical Ni–Fe–Al layered double hydroxide with excellent sensing properties for NOx at room temperature

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Publication details

The article was received on 30 Aug 2016, accepted on 17 Oct 2016 and first published on 18 Oct 2016


Article type: Paper
DOI: 10.1039/C6RA21645E
Citation: RSC Adv., 2016,6, 103192-103198
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    One-step synthesis of hierarchical Ni–Fe–Al layered double hydroxide with excellent sensing properties for NOx at room temperature

    D. Hong, J. Zhang, A. U. Rehman, L. Gong, J. Zhou, K. Kan, L. Li and K. Shi, RSC Adv., 2016, 6, 103192
    DOI: 10.1039/C6RA21645E

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