Cobalt-graphene Nanocomposite Electrode for Phosphate Sensing

Cobalt-decorated graphene nanocomposite electrode was prepared via an electrochemical strategy and utilized for phosphate sensing. Electrochemical approach has found to be a simple, cheap, and green method for this purpose. The composite electrode was also characterized with scanning electron microscopy and cyclic voltammetry. Characteristics such as potentiometric response, calibration curve, response time, effects of dissolved oxygen, interfering ions, and pH were also evaluated. The potentiometric response for the range of 10-6 to 10-2 M showed a good linear relationship with the logarithm of phosphate concentrations with a slope of -31.6 mV per decade change of concentration