Photocatalytic activity of visible light-responsive TiO2 thin films deposited on various anodized Ti-metal substrates by a RF magnetron sputtering method

Abstract

Visible light-responsive TiO 2 (Vis-TiO 2 ) thin film has been deposited on two different kinds of anodized Ti-metal substrates, i.e., plate-type Titanystar (P-Titanystar) or non-woven fabric Titanystar (N-Titanystar) by a radio-frequency magnetron sputtering (RF-MS) method. These Vis-TiO 2 thin film photocatalysts (Vis-TiO 2 /P-Titanystar and Vis-TiO 2 /N-Titanystar) showed high activity for the oxidation of 2-propanol in water under UV light irradiation while Vis-TiO 2 /NTitanystar showed higher activity than Vis-TiO 2 /P-Titanystar. Furthermore, photocatalytic activity of Vis-TiO 2 /N-Titanystar was enhanced by the Pt deposition by an RF-MS deposition method. Pt loaded Vis-TiO 2 /N-Titanystar (Pt-Vis-TiO 2 /NTitanystar) acted as an efficient photocatalyst for the oxidation of methanol vapor under UV light irradiation even in a flow system. Moreover, it was found that Pt-Vis-TiO 2 /N-Titanystar is an effective photocatalyst for the oxidation of various organic compounds in gas phase or ammonia gas even under visible light irradiation (k [ 420 nm) at 293 K.

MnO2 AND MnO2/TiO2 MEDIATED, PERSULPHATE ENHANCED PHOTOCATALYSIS FOR THE REMOVAL OF INDIGO CARMINE DYE POLLUTANT FROM WATER

“…These include dye sensitization, semiconductor coupling, impurity doping, use of coordination metal complexes and metal deposition. 4,[10][11][12][13][14] Composites such as TiO2/carbon have also been reported. 15 Physical modification of TiO2 with small amounts of transition metal cations such as vanadium and chromium extends the absorption up to 550 nm and makes it active under UV as well as sunlight.…”

Characterization and Photocatalytic Activity of TiO₂ Nanoparticles with Precipitation Method Synthesis

“…Anatase TiO 2 has been attracting a numerous attention due to many profitable potential applications in the fields of photoelectric devices and photocatalysis [1][2][3][4]. However, there is still a problem that the photocatalytic efficiency of TiO 2 need to be improved since TiO 2 is photoactive only under near UV-light irradiation.…”