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Issue 15, 2017
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Formaldehyde sensing based on the catalytic reaction of β-HgS nanocrystals

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Abstract

We found that β-HgS nanocrystals could catalyze the reactions of oxidase substrates such as 3,3′,5,5′-tetramethylbenzidine (TMB) and O-phenylenediamine (OPD) to form coloured and fluorescent products, respectively, but α-HgS nanocrystals could not catalyze these reactions. Further investigation revealed that the predominantly exposed crystal planes may play an important role in determining the catalytic activity. On the basis of these findings, taken together with the reaction of forming a Schiff base between the –NH2 group of OPD and the –CHO group of formaldehyde, a novel, simple, and highly selective photoluminescence (PL) sensing platform for detecting formaldehyde could thereby be successfully developed.

Graphical abstract: Formaldehyde sensing based on the catalytic reaction of β-HgS nanocrystals

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Publication details

The article was received on 24 Jan 2017, accepted on 13 Mar 2017 and first published on 13 Mar 2017


Article type: Paper
DOI: 10.1039/C7TC00404D
Citation: J. Mater. Chem. C, 2017,5, 3757-3764
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    Formaldehyde sensing based on the catalytic reaction of β-HgS nanocrystals

    J. Shen, J. Wu, X. Sun, Z. Wu, P. Gao and Bin Liu, J. Mater. Chem. C, 2017, 5, 3757
    DOI: 10.1039/C7TC00404D

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