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Issue 22, 2011
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Advanced NOx gas sensing based on novel hybrid organic–inorganic semiconducting nanomaterial formed between pyrrole and Dawson type polyoxoanion [P2Mo18O62]6

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Abstract

Dawson-type K6P2Mo18O62·nH2O can be used as an oxidizing agent to polymerize pyrrole and yield a hybrid organic–inorganic nanostructured material [{Py}6(P2Mo18O62)]x. By adding the mild reducing agent potassium iodide (KI), the polymerization process was controlled to generate a hybrid material with low polypyrrole content [K4{Py}2(P2Mo18O62)]y. The electrical transport properties of [K4{Py}2(P2Mo18O62)]y displayed a perfect transistor operation suitable for gas sensing applications. Exposure of [K4{Py}2(P2Mo18O62)]y to various gases illustrated a selective and sensitive response to NOx gases. In addition, an interesting extended linearity up to 5500 ppm was recorded.

Graphical abstract: Advanced NOx gas sensing based on novel hybrid organic–inorganic semiconducting nanomaterial formed between pyrrole and Dawson type polyoxoanion [P2Mo18O62]6−

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Publication details

The article was received on 23 Mar 2011, accepted on 13 Apr 2011 and first published on 03 May 2011


Article type: Communication
DOI: 10.1039/C1JM11244A
Citation: J. Mater. Chem., 2011,21, 7886-7891
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    Advanced NOx gas sensing based on novel hybrid organic–inorganic semiconducting nanomaterial formed between pyrrole and Dawson type polyoxoanion [P2Mo18O62]6

    M. Ammam and E. B. Easton, J. Mater. Chem., 2011, 21, 7886
    DOI: 10.1039/C1JM11244A

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