Open AccessModified Graphite Paper Based Miniaturized Electrochemically Optimized Hydrazine Sensing Platform
Author(s) -
Jaligam Murali Mohan,
Khairunnisa Amreen,
Arshad Javed,
Satish Kumar Dubey,
Sanket Goel
Publication year - 2020
Publication title -
ecs journal of solid state science and technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.488
H-Index - 51
eISSN - 2162-8777
pISSN - 2162-8769
DOI - 10.1149/2162-8777/ab951a
Subject(s) - hydrazine (antidepressant) , materials science , detection limit , graphite , electrode , redox , electrochemistry , linear range , oxide , graphite oxide , copper oxide , copper , inorganic chemistry , chemical engineering , analytical chemistry (journal) , composite material , metallurgy , chemistry , chromatography , engineering
In this work, a miniaturized platform for electrochemical detection of hydrazine, has been developed using droplet paper based three electrode system. Copper oxide cluster (CuO) immobilized on the surface of graphite sheet (Grp@CuO) is used as a working electrode. The developed Grp@CuO showed a surface-confined delayed redox response at an electrode potential (E 1/2 ) −0.24 V vs Ag/AgCl in pH 7 phosphate buffer solution (PBS). The physicochemical characterization of the Grp@CuO revealed the electro deposition of CuO cluster on the surface of graphite sheet. Grp@CuO displayed selective electro-catalytic activity towards the detection of hydrazine in pH 7.0 PBS. A systematic linear increase in the oxidation current is observed in the range of 1 μ M to 7 μ M at an applied potential of −0.6 to 0.2 V vs Ag/AgCl with an excellent current sensitivity, lower detection limit (0.3482 μ M). The fabricated miniaturized droplet-based sensor showed zero interference from other chemicals. Therefore, it is a viable option to be used in detection of hydrazine in real samples. Finally, the prepared platform was harnessed to real water samples for hydrazine detection.