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Efficient hydroquinone sensor based on zinc, strontium and nickel based ternary metal oxide (TMO) composites by differential pulse voltammetry
Ist Teil von
Sensors and actuators. B, Chemical, 2018-03, Vol.256, p.383-392
Ort / Verlag
Lausanne: Elsevier B.V
Erscheinungsjahr
2018
Link zum Volltext
Quelle
Elsevier ScienceDirect Journals Complete
Beschreibungen/Notizen
[Display omitted]
•TMO composites prepared by wet-chemical method.•Highly sensitive and selective hydroquinone sensor by I–V method.•Ultra-low detection limit was obtained by 3N/S.•Real environmental samples were analyzed.•Health care and environmental safety.
A ternary metal oxide (TMO; SrO.NiO.ZnO) was synthesized to detect hydroquinone (HQ) from water via electrochemical reactions. The spectroscopic and electrochemical investigations showed that the TMO particles possess entirely different electronic and catalytic properties from its constituents. The TMO particles on a glassy carbon (GC) electrode showed the best reactivity at a pH value of 7.0. At the electrode surface, HQ molecules involved coupled two electron two proton transfer reversible reaction. This electrode displayed an excellent sensitivity (2.3782μAμM−1cm−2), ultra-low detection limit (LOD: 2.3±0.1 pM; S/N=3), long term stability, very good repeatability, and reproducibility. In diagnostic exploration, a linear calibration plot was obtained for a large concentration range of HQ (0.40nM to 0.02M; r2=0.9965). This method represents an efficient way of sensitive sensor development for the detection of toxic and carcinogenic phenolic compounds.