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Multicomponent Template EffectsPreparation of Highly Porous Polyaniline Nanorods Using Crude Lemon Juice and Its Application for Selective Detection of Catechol
journal contribution
posted on 2017-12-27, 00:00 authored by Vineeta Gautam, Karan P. Singh, Vijay L. YadavThis paper deals
with the preparation and characterization of three
different polyaniline samples, namely, PANI-HCl (synthesis in inorganic
acid), PANI-Citric acid (synthesis in organic acid), and PANI-Lemon
(synthesis in crude lemon juice–biological-derived acidic solution).
PANI-Lemon is a low-density polymer with well-defined nanorod shape
morphology (∼100 nm in diameter and ∼300–600
nm in length). Lemon juice manipulates the morphology of PANI because
it has a lower pKa and the matrix molecules
produce template-like effects. The distinct structure of PANI-Lemon
was confirmed from microscopic and spectroscopic analysis. In the
same protonating condition, the alignment of chains is the dominating
factor which governs the conductivity of polyaniline. PANI-Lemon was
successfully applied for the electrocatalytic detection of catechol.
The selective interaction of PANI-Lemon with catechol leads to the
generation of a new redox center. PANI-Lemon-modified carbon paste
electrode exhibited high sensitivity (49.68 μA μM–1 cm–2), specificity, a wide linear
range (from 5 μM to 100 mM), a low detection limit (2.1 μM),
and less response time (2 s). On the basis of our results, we propose
an eco-friendly concept "multicomponent template effects"
to bring
nanoscale morphological manipulation using a suitable natural extract.
This concept could be equally implemented to synthetic polymers and
other nanoparticles.
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p K5 μ MPANI-Lemon-modified carbon paste electroderedox centerpolyaniline sampleselectrocatalytic detectionacidLemon juicemorphologyprotonating conditionsynthesismatrix moleculescatecholpaper dealsPorous Polyaniline NanorodsSelective Detectiontemplate-like effectspolymereco-friendly conceptnmspectroscopic analysisCrude Lemon Juicemulticomponent template effects
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