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Issue 17, 2019
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Multichannel pathway-enriched mesoporous NiO nanocuboids for the highly sensitive and selective detection of 3-hydroxy-2-butanone biomarkers

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Abstract

Listeria monocytogenes (LMs) that release 3-hydroxy-2-butanone (3H-2B) biomarker, can cause serious human illness and even death; in this regard, conventional techniques for the smart detection of LMs are of vital importance; however, they still suffer from the requirement of either sophisticated techniques or complicated instrumentation. Herein, we report a metal-oxide semiconductor (MOS) sensor, built with 3D mesoporous nickel oxide nanocuboids (M-NiO NCs), for the detection of LMs. The M-NiO NCs were obtained by directly sacrificing nickel foam in oxalic acid, followed by subsequent annealing. The M-NiO NCs have a rough surface and many multichannel pathways. Impressively, gas sensors built with M-NiO NCs display excellent sensing performance towards the 3H-2B biomarker, exhibiting an ultrahigh sensitivity (Rg/Ra = 302 at 50 ppm) and excellent selectivity. Moreover, the 3H-2B sensor presents excellent long-term stability and, particularly, a low limit of detection (LOD = 0.5 ppm) at 120 °C. The multichannel pathways of the M-NiO NCs contribute to gas adsorption and diffusion, thus enhancing the sensing behavior. Our study provides an ingenious and low-cost strategy to produce mesoporous NiO nanostructures as well as new insights for the detection of pathogenic microbes in food.

Graphical abstract: Multichannel pathway-enriched mesoporous NiO nanocuboids for the highly sensitive and selective detection of 3-hydroxy-2-butanone biomarkers

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Publication details

The article was received on 26 Jan 2019, accepted on 26 Mar 2019 and first published on 26 Mar 2019


Article type: Paper
DOI: 10.1039/C9TA01013K
Citation: J. Mater. Chem. A, 2019,7, 10456-10463

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    Multichannel pathway-enriched mesoporous NiO nanocuboids for the highly sensitive and selective detection of 3-hydroxy-2-butanone biomarkers

    Z. Zhu, L. Zheng, S. Zheng, J. Chen, X. Xing, D. Feng and D. Yang, J. Mater. Chem. A, 2019, 7, 10456
    DOI: 10.1039/C9TA01013K

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