Improvement of photocatalytic efficiency of rutile titania by silver negative-ion implantation

Synthesis of Ag ion-implanted TiO2 thin films for antibacterial application and photocatalytic performance

“…1(b), (d)and (e). The cross-sectional TEM[44][45] images shows that very small Ag nanoparticles (about 2-3 nm) were formed near the surface of TiO 2 , and no nanoparticles were observed in the implanted region after annealing at 500 °C for 2 h. However, we disagree with the thorough disappearance of Ag NPs. It's reasonable that smaller particles out of the observation of TEM were formed during annealing.…”

“…Because of several advantages of thin films modification, such as non-contamination, easy control of the thickness and composition of ion rich layer, ion implantation was chosen in the modification of TiO 2 [38][39][40][41][42][43][44][45][46][47][48][49][50]. As to Ag ion-implantation, several studies have reported that very small (about 2-3 nm) Ag NPs were formed near the surface of TiO 2 films [44,45]. However, after annealing, no Ag NPs are observed in the implanted region [44], which means the existence of implanted Ag is still in the form of ions mainly.…”

Photocatalytic hydrogen generation over alkaline-earth titanates in the presence of electron donors

“…This result may be due to the fact that CaTiO 3 : TiO 2 contains only two phases. The UV absorption edge at about 399 nm can be ascribed to the fundamental absorption of the rutile form of titanium dioxide [17]. The second absorption edge at about 343 nm can be attributed to the absorption of CaTiO 3 with a perovskite structure [18].…”

Titanium Dioxide Thin Film Deposition on Ag-Nanoparticles Embedded Silica Glass and Its Photocatalytic Properties

“…Since Honda-Fujishima effect [1,2] was reported in 1969 and 1972, the development of effective TiO2 photocatalysts has been much progressed [3], and it is still desired to improve its photocatalytic performance. In our previous works about improvement of their photocatalysis [4][5][6][7], we implanted silver negative ions into TiO2 rutile and titania sol-gel film to form Ag nanoparticels in the TiO2. By this method, the photocatalytic performance was increased about twice or more.…”