Author/Authors :
Mohammad Darvish, S Department of Physics - Alzahra University, Tehran, 199389, I.R. Iran , Morteza Ali, A Department of Physics - Alzahra University, Tehran, 199389, I.R. Iran , Ramezani Sani, S Department of Physics - Roudehen Branch Islamic Azad University, Roudehen, I.R. Iran
Abstract :
Multi-walled carbon nanotubes (MWCNT)-doped TiO2 thin films were
synthesized by the dip-coating method. The obtained products were
characterized by SEM, EDX, XRD, and UV-vis absorption spectroscopy. The
XRD patterns showed the presence of anatase phase. Absorption spectrum of
MWCNT-doped TiO2 revealed a red shift in the optical absorption edge due to
carbon doping. The photocatalytic properties were investigated using
methylene blue (MB) degradation under visible light (400-700 nm).
MWCNT/TiO2 thin films exhibited significantly higher photocatalytic activity
as compared to undoped TiO2 thin films due to reduction of the rate of
electron-hole recombination by doping carbon. Photocatalytic activity studies
with different light source (white light and blue light) indicated a significant
enhancement in photocatalytic removal under white light irradiation.
