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Photocatalytic activity of TiO2 loaded with metal clusters

Grabowska E., Remita H., Zaleska A.

Physicochemical Problems of Mineral Processing

2010

Vol. 45

29-38

TiO2 was surface modified with silver, gold and platinum ion clusters to improve its photocatalytic activity. The effect of metal content, the kind of dopant and titanium dioxide source (commercial - P25 and ST-01) used during preparation procedure on photoactivity were investigated. The photocatalytic activity was estimated by measuring the decomposition rate of 0.21 mM phenol aqueous solution under UV-Vis and visible (λ > 400 nm). The highest photoactivity was observed for TiO2 loaded with silver (2%Ag on P25), gold (1%Au on P25) and platinum (0.5% Pt on ST-01) clusters. After 60 min. of irradiation under UV light phenol solution was degraded in 91%, 49% and 91%, respectively

Nonadditive effects in small metal and polyatomic molecular clusters

Novaro O.

Polish Journal of Chemistry

1998

Vol. 72, nr 7S

1432-1446

A review of the role of multibody effects in the behavior of oligomer bound states, crystalline structures, adsorption properties of surfaces and dense states of matter is given. Special emphasis is placed on the work of W. Kołos and coworkers in the University of Warsaw and Mexico. New results including electron correlation are given here, confirming the enormous role played by the multibody corrections in the stability of metallic clusters as Lin and Ben, where nonadditive effects are very large, to the point of making the convergence of the multibody expabsion of the energy extremely doubtful. For polyatomic molecular clusters as (NH3)3 multibidy effects albeit small, still are quite relevant to determine the cluster stability and geometry.