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Ali Akbar Ashkarran

Ali Akbar Ashkarran

Academic rank: Assistant Professor
ORCID:
Education: PhD.
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Faculty:
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Phone: 01135302485

Research

Title
Visible light photo-and bioactivity of Ag/TiO 2 nanocomposite with various silver contents
Type
JournalPaper
Keywords
Ag/TiO 2 nanocomposite Arc discharge Sol-gel Heterogeneous photocatalysis Antibacterial activity
Year
2011
Journal CURRENT APPLIED PHYSICS
DOI
Researchers Ali Akbar Ashkarran ، Seyed Mahyad Aghigh ، Mona Kavianpour ، Neda Jalali Farahani

Abstract

Ag/TiO2 nanocomposite with various silver contents was synthesized by combination of sol-gel and the novel arc discharge methods in liquid. The Ag/TiO2 nanoparticles were characterized by X-Ray diffraction (XRD), Brunauer Emmett Teller (BET), transmission electron microscope (TEM) and ultra violet-visible absorption spectroscopy (UV-Vis). The visible light antibacterial activities and photocatalytic properties were successfully demonstrated for the inactivation of Escherichia coli (E-coli) bacteria and Rhodamine B (Rh. B). The results revealed that the Ag/TiO2 nanoparticles extended the light absorption spectrum toward the visible region and significantly enhanced the inactivation of E-coli bacteria under visible light irradiation. 0.15 gr Ag/TiO2 nanoparticles revealed best antibacterial activity while 0.05 gr Ag/TiO2 nanoparticles exhibited highest photocatalytic efficiency. The significant enhancement in the photocatalytic activity and antibacterial properties of Ag/TiO2 nanoparticles under visible light irradiation can be ascribed to the effect of noble metal Ag by acting as electron traps in TiO2 band gap. A mechanism for photocatalytic degradation of organic pollutants and antibacterial activity over Ag/TiO2 nanoparticles was proposed based on our observations.