No abstract

A group of selected hexafluorometallates ([AlF 6 ] 3− , [TiF 6 ] 2− , [ZrF 6 ] 2− , and [SiF 6 ] 2− ) has been adsorbed at the surface of titanium dioxide. Such modification influenced the electronic and chemical properties of TiO 2 , as well as its photoactivity. The modification with [TiF 6 ] 2− inhibited the efficiency of OH • production but enhanced the generation of photocurrent and singlet oxygen. The results of modifications with [ZrF 6 ] 2− were the oppositegeneration of 1 O 2 was not observed in this case and photocurrents were lower; however, due to a better OH • production, degradation of herbicides was faster.

No abstract

Supported manganese-cobalt spinel catalysts and the corresponding mesoporous carbon supports were examined in order to reveal the effect of electric conductivity and surface oxygen functionalities on oxygen reduction reaction (ORR)...

Slight surface modifications of TiO2 (“insignificant” at first glance), such as exposing to reducing or oxidizing agents and deposition of small amounts of a semiconductor material at the surface, may strongly affect the photoactivity of materials.