Abstract
The photocatalytic oxidation of manganese(II) in aqueous suspensions of TiO2 on UV illumination was investigated. The experimental results obtained for manganese(II) solutions as a function of the initial concentration, mass of semiconductor in suspension, pH, light intensity and temperature are reported. The pH of the solution is a key parameter that determines the efficiency of manganese(II) photo-oxidation. Near to the point of zero charge of TiO2 the adsorption of manganese(II) onto TiO2 particles increases sharply, favouring charge transfer reactions at the semiconductor-electrolyte interface. The experimental results obtained from manganese(II) solutions at neutral pH agree with the Langmuir-Hinshelwood kinetic model and the corresponding equilibrium adsorption and rate constants have been deduced. © 1992.
Original language | English |
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Pages (from-to) | 237-240 |
Journal | Journal of Photochemistry and Photobiology, A: Chemistry |
Volume | 69 |
Issue number | 2 |
DOIs | |
Publication status | Published - 1 Jan 1992 |