Química Nova | |
Enhanced photocatalytic activity of TiO2 films by modification with polyethylene glycol | |
Ramírez-Santos, Álvaro A.1  Acevedo-Peña, Próspero1  Córdoba, Elcy M.1  Universidad Industrial de Santander, Santander, Colombia1  | |
关键词: polyethylene glycol (PEG); photocatalysis; TiO2 films.; | |
DOI : 10.1590/S0100-40422012001000008 | |
学科分类:化学(综合) | |
来源: Sociedade Brasileira de Quimica | |
【 摘 要 】
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.
【 授权许可】
Unknown
【 预 览 】
Files | Size | Format | View |
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RO201912050595527ZK.pdf | 3090KB | download |