A study on photocatalytic activity of micro-arc oxidation TiO2 films and Ag+/MAO-TiO2 composite films

Structure and catalytic performance of Zn-doped TiO2 film

“…With increasing coating thickness, the zinc concentration increased gradually from the substrate. However, the formation of micro cracks in the coatings may be due to the process of MAO and the possibility of zinc doping (Xiang et al , 2015).…”

Microstructure and photocatalytic performance of micro arc oxidation coatings after heat treatment

“…The crystalline phase of the pure TiO 2 film is anatase, because it is very difficult for the metastable anatase phase to transform to thermodynamically stable rutile phase due to less heat produced by mild spark discharge on the surface of anode for a low conductivity of the solution. Xiang et al [10] also reported that TiO 2 film was mainly composed of anatase generated during MAO process. Furthermore, it was found that the crystalline phase of the pure TiO 2 film after heat treatment was still composed of anatase phase.…”

“…Since the band gap energy (Eg) of titania is relatively wide, considerable efforts have been extended to broaden the absorption edge of TiO 2 toward the visible part of the spectrum in the last three decades, and so it is expected to be a new method for the preparation of high performance TiO 2 photocatalytic coating. The TiO 2 coatings doped with metallic or nonmetallic elements (such as Ag, V, W, B, N and S) to enhance the photocatalytic properties have been reported by some references [10][11][12][13]. Furthermore, heat treatment is another method for improving the photocatalytic properties of the coatings and also beneficial for increasing the coating adhesion strength, which is used in TiO 2 thin film or powder [14][15][16].…”

Preparation of Amine-Functionalized TiO2/Carbon Photocatalyst by Arc Discharge in Liquid

“…Among various semiconductors, titanium dioxide (TiO 2 ) has been found to decompose different kinds of organic and inorganic waste in gas and liquid phases, and it has become one of the most popular photocatalysts because it is chemically and biologically inert, photocatalytically stable, commercially available, inexpensive and, environmentally friendly [1][2][3]. However, TiO 2 has several limitations such as a tendency to aggregate, causing TiO 2 particles to lose the effective surface area on which the catalytic process takes place.…”