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Quaternary ammonium-functionalized carbon dots for sensitive and selective detection of 2,4,6-trinitrophenol in aqueous medium.
- Source :
-
Sensors & Actuators B: Chemical . Jun2018, Vol. 262, p298-305. 8p. - Publication Year :
- 2018
-
Abstract
- A new fluorescence nanosensor for sensitive and selective 2,4,6-trinitrophenol (TNP) determination is reported based on (3-chloro-2-hydroxypropyl)trimethylammonium chloride (CTA) functionalized carbon dots (CTA-CDs). Carboxymethyl cellulose sodium (CMC)-4,7,10-trioxa-1,13-tridecanediamine (TTDDA) mixture was heated to prepare passivated CDs. Then CTA was grafted onto the surface of the passivated CDs by esterification reaction to form quaternary ammonium-functionalized CTA-CDs. Therefore, the CTA-CDs are used as a sensor for the detection of 2,4,6-trinitrophenol (TNP) in water via molecular interactions (electrostatic, π−π, and hydrogen bonding interactions) between TNP and CTA-CDs. A limit of detection of the CTA-CDs for TNP in aqueous solution is 7.04 × 10 −7 mol/L, which is lower than that of the passivated CDs for TNP (3.03 × 10 −6 mol/L). In addition, compared with various organic reagents, the CTA-CDs exhibit significantly sensitive and selective sensing towards TNP in aqueous medium. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 09254005
- Volume :
- 262
- Database :
- Academic Search Index
- Journal :
- Sensors & Actuators B: Chemical
- Publication Type :
- Academic Journal
- Accession number :
- 128276309
- Full Text :
- https://doi.org/10.1016/j.snb.2018.02.008