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Issue 41, 2016
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Fluoral-p infiltrated SiO2 inverse opal photonic crystals as fluorescent film sensors for detecting formaldehyde vapor

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Abstract

We demonstrate a quickly responsive, highly sensitive, excellently selective and conveniently recyclable fluorescent film sensor for the detection of formaldehyde (FA) vapor, which is based on Fluoral-p infiltrated SiO2 inverse opal photonic crystals (IOPCs). The as-prepared sensor combined the properties of the IOPC’s interconnected macroporous structure, high surface area, and slow photon effect which can amplify the fluorescence, and the formation of a fluorescent product generated from selective reaction between Fluoral-p and FA. Upon exposure to FA vapor for 20 s, the resulting fluorescence can be clearly observed and the intensity can be magnified remarkably. The fluorescence enhancement for FA detection on the optimized sensor can be up to 76.3-fold compared with that for the control sample. The sensor achieved a detection limit of 0.008 mg m−3 and had good selectivity for FA. Additionally, the sensor could be easily recycled by washing with ethanol, followed by infiltration by Fluoral-p again. Therefore, the designed Fluoral-p infiltrated IOPC can be utilized as a highly effective fluorescent sensor for detecting gaseous FA, which provides a promising strategy for improving response rate and detection sensitivity, and has enormous potential for the detection of other gases by choosing suitable IOPCs and functional reaction molecules.

Graphical abstract: Fluoral-p infiltrated SiO2 inverse opal photonic crystals as fluorescent film sensors for detecting formaldehyde vapor

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Publication details

The article was received on 06 Sep 2016, accepted on 28 Sep 2016 and first published on 28 Sep 2016


Article type: Paper
DOI: 10.1039/C6TC03862J
Citation: J. Mater. Chem. C, 2016,4, 9841-9847
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    Fluoral-p infiltrated SiO2 inverse opal photonic crystals as fluorescent film sensors for detecting formaldehyde vapor

    Y. Zhang, L. Mu, R. Zhou, P. Li, J. Liu, L. Gao, L. Heng and L. Jiang, J. Mater. Chem. C, 2016, 4, 9841
    DOI: 10.1039/C6TC03862J

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