Heterogeneous photocatalytic oxidation of manganese(II) over TiO<inf>2</inf>

A. Lozano; J. Garcia; X. Dormènech; J. Casado

doi:10.1016/1010-6030(92)85283-Z

Heterogeneous photocatalytic oxidation of manganese(II) over TiO<inf>2</inf>

A. Lozano, J. Garcia, X. Dormènech, J. Casado

Research output: Contribution to journal › Article › Research › peer-review

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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
Pages (from-to)	237-240
Journal	Journal of Photochemistry and Photobiology, A: Chemistry
Volume	69
Issue number	2
DOIs	https://doi.org/10.1016/1010-6030(92)85283-Z
Publication status	Published - 1 Jan 1992

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title = "Heterogeneous photocatalytic oxidation of manganese(II) over TiO2",

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. {\textcopyright} 1992.",

author = "A. Lozano and J. Garcia and X. Dorm{\`e}nech and J. Casado",

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AU - Lozano, A.

AU - Garcia, J.

AU - Dormènech, X.

AU - Casado, J.

PY - 1992/1/1

Y1 - 1992/1/1

N2 - 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.

AB - 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.

U2 - 10.1016/1010-6030(92)85283-Z

DO - 10.1016/1010-6030(92)85283-Z

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VL - 69

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EP - 240

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