In this thesis, the graphitic-like nanosized material (g-C 3 N 4 ) was synthesized by the calcination of an available and inexpensive precursor urea. The graphitic-like nanosized material was characterized by elemental analysis, FT-IR, XRD, BET, TGA and SEM and the results showed the successful synthesis of g-C 3 N 4 . A certain amount of g-C 3 N 4 was dispersed in methanol and placed under ultrasonic radiation for 2 h and then Cu(NO 3 ) 2 solution (0.5 M) was added dropwise and stirred for 6 h. Finally, the dispersed sample was filtered. The above steps were also carried out for nickel and zinc salts. The products of the metallation reaction including Cu/g-C 3 N 4 , Ni/g-C 3 N 4 and Zn/g-C 3 N 4 were characterized by FT-IR, XRD, BET, TGA, SEM and ICP. The results indicated that the metal particles were immobilized on the g-C 3 N 4 surface. In the following, the electrical conductivity of the metallated graphitic-like nanosized nanocomposites was measured in different conditions. Since the graphitic-like nanosized material (g-C 3 N 4 ) has a very low specific weight, its moisture adsorption is high, providing an acceptable electrical conductivity. Therefore, the electrical conductivity was measured with different percentages of moisture in the presence of different concentration of NaCl solution. The results showed an improvement in the electrical conductivity of the composite materials. Also to improve the electrical conductivity of the composite materials, the effect of the high temperature on the composite properties was investigated. The calcination at 800 °C under two different atmospheres including O 2 and Ar was selected during this project and the results showed an increasing electrical conductivity at this optimized conditions.