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Environmental pollutants simultaneous determination: DNA catalyst mediated polyaniline biocomposite nanostructures
Ist Teil von
Biocatalysis and agricultural biotechnology, 2019-09, Vol.21, p.101352, Article 101352
Ort / Verlag
Elsevier Ltd
Erscheinungsjahr
2019
Link zum Volltext
Quelle
Alma/SFX Local Collection
Beschreibungen/Notizen
In this work, α-Fe2O3, Polyaniline (PANi), MoS2 sheets and DNA are integrated as a versatile platform by a simple chemical route for the detection of environmental pollutants. The structure and morphology of the hybrid characterized by Raman, XRD, UV–Vis, SEM and CH instrument revealing that the hybrid nanostructure was composed of few-layered MoS2 nanosheets with enlarged interlayer distance, suitable for electron transfer process. PANi-α-Fe2O3–MoS2-DNA hybrid nanostructure significantly exhibited better electro catalytic activity toward simultaneous detection of pollutants such as hydroquinone (HQ), catechol (CC), resorcinol (RS) and nitrite (NO2−). The hybrid electro catalyst shows simultaneous linear response of HQ, CC, RS and NO2− in the concentration range of 500 nM–300 μM, 400 nM–300 μM, 200 nM-300 μM and 300 nM-300 μM with lowest detection limits 180, 178, 95 and 102 nM respectively. In addition, the biosensor exhibited excellent sensitivity, selectivity and stability. The real time application of PANi-α-Fe2O3–MoS2-DNA hybrid nanostructure demonstrated with satisfactory results in detecting HQ, CC, RS and NO2− in well water and pond water samples.
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•The α-Fe2O3 catalyst significantly identified as a material for biosensing.•MoS2 effectively reduced the oxidation potential by10, 9, 24 and 81 mV.•DNA to make biocompatibile for the pollutants detection.