Characterization, photocatalytic, and antibacterial activity of Ag–TiO2 nanoparticles prepared by electrical arc discharge method

Journal of the Iranian Chemical Research

مقاله 7، دوره 5، شماره 1، خرداد 2012، صفحه 39-46   

نویسندگان

Mahdi Hajivaliei^* ؛ Majid Lashkanpour

Department of Physics, Bu-Ali Sina University, Hamedan, Iran

چکیده

A simple, inexpensive and one-step synthesis route of Ag-TiO2 nanoparticles by arc discharge method is
reported. The resulting nanoparticles were characterized 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 on TiO2 after arc discharge process. Scanning electron microscopy images exhibit
the increase of reduced nanoparticles in 5 minutes arc duration compared with 1 minute 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. Antibacterial activities
of Ag-TiO2 nanoparticles were investigated at the presence of Escherichia coli bacteria.

کلیدواژه‌ها

Ag-TiO2 nanoparticles؛ antibacterial activity؛ Electrical arc discharge method؛ Photocatalytic Activity

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