One pot fabrication of fluorescein functionalized manganese dioxide for fluorescence "Turn OFF-ON" sensing of hydrogen peroxide in water and cosmetic samples
In recent decades, H 2 O 2 has been promoted as a health indicator because its moderate to high levels can cause some health problems. Herein, we developed a new fluorescent nanoprobe for rapid, selective and sensitive detection of H 2 O 2 . The fluorescent nanoprobe is composed of fluorescein dye (...
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| Published in: | RSC advances 2020-05, Vol.1 (3), p.1756-17514 |
|---|---|
| Main Authors: | , , , |
| Format: | Article |
| Language: | eng |
| Subjects: | |
| Online Access: | Get full text |
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| Summary: | In recent decades, H
2
O
2
has been promoted as a health indicator because its moderate to high levels can cause some health problems. Herein, we developed a new fluorescent nanoprobe for rapid, selective and sensitive detection of H
2
O
2
. The fluorescent nanoprobe is composed of fluorescein dye (FLS) as a fluorescent probe and MnO
2
nanosheets (MnO
2
NS) as a quencher. In this study, H
2
O
2
can reduce MnO
2
NS in the synthesized composite and release FLS, causing sufficient recovery of fluorescent signal related to the concentration of H
2
O
2
. The nanoprobe, with
λ
ex
/
λ
em
at 495/515 nm, has a linear range of 0.04-30 μM, with a limit of detection (LOD) of 7.5 nM and a limit of quantitation (LOQ) of 21 nM. The mean relative standard deviation (RSD) was 2.6% and the applicability of the method was demonstrated by the determination of H
2
O
2
in water and cosmetic samples.
The fluorometric nanoprobe was fabricated
via
doping of fluorescein dye in MnO
2
nanosheets (FLS/MnO
2
NS)
via
facile co-precipitation method. It was used for analysis of H
2
O
2
in different matrices through liberation of FLS after reduction of MnO
2
NS. |
|---|---|
| ISSN: | 2046-2069 2046-2069 |