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

Abstract

We found that β-HgS nanocrystals can catalyze the oxidase substrates such as 3,3’,5,5’-tetramethyl benzidine (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 plane maybe play an important role for determining the catalytic activity. On the basis of these findings, taken together the reaction of forming Schiff base between –NH2 group of OPD and –CHO group of formaldehyde, thereby a novel, simple, and highly selective photoluminescence (PL) sensing platform for detecting formaldehyde could be successfully developed.

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Publication details

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


Article type: Paper
DOI: 10.1039/C7TC00404D
Citation: J. Mater. Chem. C, 2017, Accepted Manuscript
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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 B. Liu, J. Mater. Chem. C, 2017, Accepted Manuscript , DOI: 10.1039/C7TC00404D

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