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Photocatalytic Oxidation of Sulfurous Acid in an Aqueous Medium

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Guillermo Hernández , Alicia Romero and Marco F. Suárez

Departamento de Química, Facultad de Ciencias, Universidad Nacional de Colombia, Bogotá, Columbia

J. Chem. Educ., 2005, 82 (8), p 1234

DOI: 10.1021/ed082p1234

Publication Date (Web): August 1, 2005

Abstract

The photooxidation process of sulfurous acid by molecular oxygen in the presence of TiO₂ is described. The effect of some reaction parameters, such as initial concentration of sulfurous acid, oxygen, TiO₂ crystalline structure, and quantity of TiO₂, were investigated. The reactions were run in an inexpensive reactor. The experiments are ideal for second-year chemistry undergraduate students interested in photocatalysis and green chemistry. Finally, a kinetic equation for the oxidation process of sulfurous acid was established in our experimental conditions.

Keywords (Audience):

Second-Year Undergraduate

Keywords (Domain):

Environmental Chemistry

Keywords (Pedagogy):

Problem Solving / Decision Making

Keywords (Subject):

Catalysis

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History

Received: August 03, 2009

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Photocatalytic Oxidation of Sulfurous Acid in an Aqueous Medium