A method for producing nano-composites comprising graphitic carbon nitride reduced to nano size, having high electrical conductivity is provided. The method includes the steps of: producing graphitic carbon nitride (g-C3N4) having a chemical formula (C3N4)m, applying an obtained g-C3N4 powder via an ultrasonic homogenization method on concentrations, obtaining a nano g-C3N4 suspension, wherein a size of the nano g-C3N4 suspension changes between 10-100 nm as a result of applying the ultrasonic homogenization method, obtaining polyaniline with a chemical formula (C6H7N)n in an emeraldine salt form, obtaining a nano-composite, mixing in aniline or aniline-HCl water at concentrations of 0.1-1 mol/L, adding a nano graphitic carbon (nano g-C3N4) into a mixture and mixing between 10-60 minutes, carrying out a polymerization process by adding an oxidant to the mixture and obtaining the nano composite having the high electrical conductivity.
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