Using electrical arc discharge method to prepare Ag-TiO2 nanoparticles and study its photocatalytic activity

Hajivaliei, Mahdi

Abstract

A simple, inexpensive and one-step synthesis route of Ag-TiO2 nanoparticles by arc discharge method has been reported. The resulting nanoparticles were characterized by using X-ray diffraction and scanning electron microscopy. X-ray diffraction patterns demonstrate dominance of rutile to anatase phase in TiO2 and formation of silver metal onTiO2 after arc discharge process. Scanning electron microscopy images exhibit the increase of reduced nanoparticles in 5 min arc duration as compared with 1 min arc duration. Photodegradation of methyl orange as a standard pollutant shows that the presence of silver in TiO2 was found to enhance the photocatalytic activity. The high activity of silver doped TiO2 is due to the enhancement of electron-hole separation by the electron trapping of silver particles.

Keyword(s)

Ag-TiO2 nanoparticles; electrical arc discharge method; photocatalytic activity

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