| Title |
Application of Prussian blue in electrochemical and optical sensing of free chlorine / |
| Authors |
Valiūnienė, Aušra ; Žižiūnaitė, Gerda ; Virbickas, Povilas |
| DOI |
10.3390/s22207768 |
| Full Text |
|
| Is Part of |
Sensors.. Basel : MDPI. 2022, vol. 22, iss. 20, art. no. 7768, p. [1-14].. eISSN 1424-8220 |
| Keywords [eng] |
Prussian blue ; Prussian white ; free chlorine ; electrochromic sensor ; fluorine-doped tin oxide |
| Abstract [eng] |
In this paper, an electrochemical free chlorine (FCL) sensor was formed by modifying a fluorine-doped tin oxide-coated glass slide (glass|FTO) with a layer of Prussian blue (glass|FTO|PB). The glass|FTO|PB sensor exhibited a wide linear detection range from 1.7 to 99.2 μmol L−1 of FCL with a sensitivity of ~0.8 µA cm−2 μmol−1 L and showed high selectivity for FCL. However, ClO−3, ClO−4 and NO−3 ions have induced only a negligible amperometric response that is highly beneficial for a real-life sample analysis as these ions are commonly found in chlorine-treated water. Moreover, in this work, optical absorption measurement-based investigations of partially reduced PB were carried out as a means to characterize PB catalytic activity towards FCL and to investigate the possibility of applying PB for the optical detection of FCL. |
| Published |
Basel : MDPI |
| Type |
Journal article |
| Language |
English |
| Publication date |
2022 |
| CC license |
|
