Surface modification of TiO2 (rutile) by metal negative ion implantation for improving catalytic properties

Characterization, adsorption and photocatalytic activity of vanadium-doped TiO2 and sulfated TiO2 (rutile) catalysts: Degradation of methylene blue dye

“…This sample showed a decrease in conversion comprised of 75%, in the same time. The activity variation with rise of calcinations temperature could be due to loss of surface area in addition to expected loss in SO 4 amounts; then there were less active centers, as has been shown for SO 4 /Zr Fe Si O catalyst whilst esterification of acetic acid and butanol that showed a decrease in activity following calcinations at high temperatures [39].…”

A surface science perspective on TiO2 photocatalysis

“…In concept, one might assume that these metals could perform the same charge separation functions for which metals such as Ag and Pt are well-known. In fact, Tsuji and coworkers [1285] have proposed that Cu metal implanted in R TiO 2 exhibited such a promotion effect for methylene blue photodegradation. However, the problem arises in maintaining the metallic state when supported Cu or Ni particles are exposed to oxidative conditions.…”

Optical and magnetic properties of Ni nanoparticles in rutile formed by Ni ion implantation

“…This change may be attributed to the Ni nanoparticles' formation in rutile. In previous studies, 10 Cu-implanted rutile ͑100͒ single crystals showed a small peak or shoulder near 2.05 eV ͑605 nm͒, and Ag-implanted samples showed an absorption peak near 2.5 eV ͑496 nm͒ due to the surface plasmon resonance ͑SPR͒ absorption. In those conditions, the size of nanoparticles for both Cu and Ag was considered to be very small, approximately 1-2 nm.…”

“…[7][8][9] A number of metallic ions ͑Cu, Ag, and Au͒ have been doped in TiO 2 to form nanoparticles modifying the photocatalytic properties of TiO 2 single crystals or thin films. 10 Room temperature ferromagnetic properties of Co-doped TiO 2 have been reported. 11 In this study, a high dose of Ni + ions was implanted into TiO 2 single crystals to form magnetic nanocomposites consisting Ni nanoparticles in TiO 2 matrix for the potential application as magnetic recording device.…”