TY - JOUR
T1 - Enhanced photocatalytic activity of TiO2 films by modification with polyethylene glycol
AU - Ramírez-Santos, Álvaro A.
AU - Acevedo-Peña, Próspero
AU - Córdoba, Elcy M.
PY - 2012
Y1 - 2012
N2 - Titanium dioxide porous thin films on the Anatase phase were deposited onto glass slides by the sol-gel method assisted with polyethylene glycol (PEG). The dip-coated films were characterized using scanning electron microscopy (SEM), thermogravimetric analysis (TGA and DTG), UV-visible spectroscopy and X-ray diffraction (XRD). The photocatalytic activity of the films was determined by means of methyl-orange oxidation tests. The resultant PEG-modified films were crack-free and developed a porous structure after calcination at 500 °C. Photo-oxidation tests showed the dependency of catalytic activity of the films on the number of layers (thickness) and porosity, i.e. of the interfacial area.
AB - Titanium dioxide porous thin films on the Anatase phase were deposited onto glass slides by the sol-gel method assisted with polyethylene glycol (PEG). The dip-coated films were characterized using scanning electron microscopy (SEM), thermogravimetric analysis (TGA and DTG), UV-visible spectroscopy and X-ray diffraction (XRD). The photocatalytic activity of the films was determined by means of methyl-orange oxidation tests. The resultant PEG-modified films were crack-free and developed a porous structure after calcination at 500 °C. Photo-oxidation tests showed the dependency of catalytic activity of the films on the number of layers (thickness) and porosity, i.e. of the interfacial area.
KW - Photocatalysis
KW - Polyethylene glycol (PEG)
KW - TiO films
UR - http://www.scopus.com/inward/record.url?scp=84870441940&partnerID=8YFLogxK
U2 - 10.1590/S0100-40422012001000008
DO - 10.1590/S0100-40422012001000008
M3 - Artículo
SN - 0100-4042
VL - 35
SP - 1931
EP - 1935
JO - Quimica Nova
JF - Quimica Nova
IS - 10
ER -