M. Khorasani-Motlagh - Department of Chemistry, University of Sistan & Baluchestan, Zahedan, Iran
M. Noroozifar - Department of Chemistry, University of Sistan & Baluchestan, Zahedan, Iran
M. Yousefi - Department of Chemistry, University of Sistan & Baluchestan, Zahedan, Iran

Ruthenium oxide materials possess versatile functionalities and properties that make them useful in numerous industries. RuO2 is known as an exceptional electrode material for high-power and high-energy density capacitors as a result of its high capacitance and exhibits low resistivity and good thermal stability. It is also known to be a metallic conductor and has been used as a catalyst for organic and inorganic reactions.Various methods for the synthesis of RuO2 were developed, such as sol–gel method, polyol method, Adams fusion method and chemical Co-precipitation. In this study, a simple co-precipitation procedure to prepare RuO2 nanosized in aqueous solution was presented. One of the main advantages of this method is no need for advanced equipments. In this method, aqueous solution of ruthenium chloride was prepared, and then adequate amount of surfactant added. The pH adjusted with NaOH solution. Subsequently precipitate was dried at 100˚C for 6 h. The perovskite structure can be obtained by calcining the product at 800˚C for 5h. The results indicated that the amount of surfactant, pH and rate of stirring were played an important role in the homogeneity and size of product. It is assumed that when the NaOH solution was added dropwise into the mixture solution, some small RuO2, crystal nuclei was formed at the initial stage of the reaction. With the increase of the NaOH solution, the slowly produced RuO2, crystallites grew on the basis of the initially formed RuO2, crystal nuclei. The nanocrystalline RuO2 was characterized by FT-IR, XRD, SEM, EDX, VSM, Uv-Vis spectroscopy.