New Preparation Method of Visible Light Responsive Titanium Dioxide Photocatalytic Films

Abstract

We report a new and simple preparation method of the visible light responsive Titanium dioxide (TiO 2) photocatalytic films using sol-gel method and ultraviolet light (UV) irradiation. Proposed films were prepared on fused silica plates using titanium tetra-isopropoxide, urea, 2-methoxyethanol, water and UV irradiation. The 650˚C-annealed films were carbon-containing anatase type TiO 2 , not carbon-doped ones. The prepared films absorbed visible light with wavelengths longer than 400 nm. Also, organic dyes were effectively photodegradated by visible light irradiation in the presence of these films.

Photocatalytic oxidative desulfurization of dibenzothiophene by C/TiO2@MCM-41 nanoparticles under visible light and mild conditions

“…4 shows the wide angle X-ray diffraction patterns. 26 A peak around 281 eV resulting from Ti-C bond is not observed, so carbon is not substituted by oxygen atom in the anatase lattice. 25 Aer incorporating of TiO 2 into the MCM-41, a decrease in the intensity of the maximum peak was observed.…”

“…These carbon residues may form highly condense and coke-like structure around TiO 2 nanoparticles and play the role of a sensitizer like organic dye molecules. 26 A peak around 281 eV resulting from Ti-C bond is not observed, so carbon is not substituted by oxygen atom in the anatase lattice. 31 Other two peaks around 286 and 288 eV are attributed to C-O and C]O, respectively which show the incorporation of carbon atoms into the interstitial positions of the TiO 2 lattice.…”

Pengaruh Laju Penginjeksian Doping Sulfur terhadap Aktivitas Fotokatalis Nanotitania Menggunakan Metode Sol Gel

“…TiO2 memiliki keunggulan antara lain murah, non-toksik dan kestabilannya tinggi apabila dikenai cahaya [4]. Dengan demikian, TiO2 banyak digunakan sebagai bahan fotokatalis.…”

Synthesis, Characterization and Photoactivity Evaluation of Nitrogen Doped Titanium Dioxide on Methylene Blue Dye Degradation

“…particle (Mahvi et al, 2009) To overcome the above-mentioned drawback in visible light utilization, many researchers have made great efforts to modify the band structure of TiO2 so as to shift its absorption edge towards the visible light region (Zhang, et al, 2013;Yilleng et al, 2018). One route for sensitizing TiO2 to visible light so as to permit the use of the main part of the solar spectrum and also forming charge traps to keep electron-hole pairs separate is by doping pure TiO2 with foreign ions (Nishizawa et al, 2014). The doping of TiO2 is currently attracting considerable interest as a promising route to extend the optical absorption of this material to visible spectral region.…”