Detection of free chlorine in water using graphene-like carbon based chemiresistive sensors.

ABSTRACT: Free chlorine is the most commonly used water disinfectant. Measuring its concentration during and after water treatment is crucial to ensure its effectiveness. However, many of the existing methods do not allow for continuous on-line monitoring. Here we demonstrate a solid state chemiresistive sensor using graphene-like carbon (GLC) that overcomes that issue. GLC films that were either bare or non-covalently functionalized with the redox-active phenyl-capped aniline tetramer (PCAT) were successfully employed to quantify aqueous free chlorine, although functionalized devices showed better performance. The response of the sensors to increasing concentrations of free chlorine followed a Langmuir adsorption isotherm in the two tested ranges: 0.01-0.2 ppm and 0.2-1.4 ppm. The limit of detectio

SUBMITTER: Zubiarrain-Laserna A 

PROVIDER: S-EPMC8979178 | biostudies-literature | 2022 Jan

REPOSITORIES: biostudies-literature