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( Pratigya ),( Sivaprakasam Radhakrishnanb ),( Santhana Sivabalan ),김병석 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
Oxalic acid (OA), a reducing agent exists widely in plants, animals and microbes. Excess intake of such products may lead to the formation of less soluble salt leading to the formation of kidney stones. In this study, a nanohybrid of gold nanoparticle, polypyrrole, and reduced graphene oxide (Au/PPy/rGO) was prepared by an in-situ chemical synthesis approach. The as-prepared nanohybrid has been applied for non-enzymatic electrochemical detection of oxalic acid in 0.1 M H2SO4 as electrolyte. The modified electrode showed a wider linear range (0.05mM to 7mM) with a lower detection limit of 0.02 mM. The experimental results also showed that the sensor has good reproducibility (R.S.D = 2.59% for 0.5mM, n = 3), high sensitivity of 91 μA/mM and good stability as well. Possible interferences such as glucose, dopamine, uric acid, Zn, Fe were investigated. The above mentioned compound does not interfere with oxalic acid detection.
( Pratigya ),( Sivaprakasam Radhakrishnan ),( Balasubramaniam Saravanakumar ),김병석 한국공업화학회 2016 한국공업화학회 연구논문 초록집 Vol.2016 No.0
A highly selective, sensitive and stable non-enzymatic glucose sensor based on CuS modified electrode was developed. The CuS microflower was prepared by simple solvothermal method without using template. The as-prepared CuS product was characterized by FE-SEM, XRD and cyclic voltammetry methods. The CuS microflower structures are proved to be a good sensing element for the determination of glucose. The CuS modified glassy carbon electrode (GCE) exhibited the lowest detection limit of 1.0 μM over a wide glucose concentration up to 5.4 x 10(-3) M. The fabricated sensor is highly selective towards the determination of glucose in the presence of physiological interferents and metal ions.
Sharma, Pratigya,Radhakrishnan, Sivaprakasam,Khil, Myung-Seob,Kim, Hak-Yong,Kim, Byoung-Suhk Elsevier 2018 Journal of Electroanalytical Chemistry Vol.808 No.-
<P><B>Abstract</B></P> <P>The simple and eco-friendly fabrication of non-noble metal catalyst is of great importance for sustainable energy production from alcohol. Herein, we report the new synthetic route for the preparation of nickel phosphate nanostructure through simple co-precipitation method. We studied the effect of annealing temperature ranging from 500°C to 1100°C on the electrocatalyst for ethanol electro-oxidation. In addition, we demonstrate that the resulting nickel phosphate materials can serve as efficient transition metal electrocatalyst for the ethanol oxidation under alkaline condition. In particular, the nickel phosphate annealed at 900°C (NP-900) affords higher current density of 1.2mAcm<SUP>−2</SUP> at the low potential of 0.7mV, demonstrating great catalytic stability as well as good cyclability for 1000cycles giving about 92% faradaic yield towards the ethanol.</P> <P><B>Highlights</B></P> <P> <UL> <LI> Simple and eco-friend no-noble metal catalysts were synthesized. </LI> <LI> Electrochemical performances of the resulting nickel phosphate were investigated. </LI> <LI> Effect of annealing temperature of nickel phosphate on electrocatalyst was studied. </LI> <LI> Catalytic stability and cyclability of nickel phosphate were studied. </LI> </UL> </P> <P><B>Graphical abstract</B></P> <P>[DISPLAY OMISSION]</P>