The document summarizes research into synthesizing MnO2-Ag nanocomposites for use in supercapacitors and glucose sensors. The nanocomposites were synthesized using different methods and concentration ratios of MnO2 and Ag. The highest specific capacitance of 189 F g-1 was achieved with a 1:0.1 weight ratio of MnO2 to Ag synthesized using a reducing agent. This method successfully produced the nanocomposite, unlike attempts using a redox reaction. Additionally, silver nanoparticles synthesized via electrodeposition were used to detect glucose oxidation for a glucose sensor application.

1. Electrochemical Investigations of Nanocomposites for
Supercapacitor and Glucose Sensor
The nanocomposite of MnO2-Ag was synthesized by reducing the KMnO4 and AgNO3
using a strong reducing agent NaBH4 for the application of supercapacitor. The weight ratio
between these compounds was maintained as five different types, 1:0.1, 1:0.2, 1:0.5, 1:1, 1:2. In
the nanocomposite of MnO2-Ag, the MnO2 is amorphous and the Ag is tetragonal formation. By
using the REDOX reaction, the MnO2-Ag composite was synthesized in the ratio of 1:0.1. In
this, methodology the composite was not prepared due to the silver concentration. The α-MnO2
was formed and but the composite does not formed. The silver nanoparticles synthesized by
using the electro-deposition method, was successfully determined the glucose oxidation reaction.
In the present work I have concluded that, the MnO2-Ag nanocomposites were prepared by two
different methods but it was successfully synthesized by only one method.
(i) The α-MnO2 was synthesized by reducing the KMnO4 using NaBH4 and discharge specific
capacitance was calculated as 240 F g-1
.
(ii) The KMnO4 and AgNO3 are reduced by using NaBH4 reducing agent and five different
(1:0.1), (1:0.2), (1:0.5), (1:1) and (1:2) concentrations were prepared. In this, the (1:0.1) weight
ratio was given the higher specific capacitance comparing to all other concentrations (189 F g-1
),
and the 1:1 and 1:2 was not given the α-MnO2, this composition contains only silver
nanoparticles.
(iii) The redox reaction does not give the MnO2-Ag composite and only α-MnO2 was observed,
due to low concentration of silver.
(iv) So, finally it is concluded that, the nanocomposite prepared using the reducing agent was
given the higher capacitance compared to REDOX reaction.
(v) The Ag-C electrode were synthesized by electrochemical deposition and used for the
detection of glucose oxidation as a glucose sensor.