Abstract
Photocatalytic reduction of carbon dioxide under visible light irradiation was carried out with Co3O4 powders suspended in water. A Pyrex glass batch reactor of 10mL in volume was used with a 21 W LED lamp of 510 to 620 nm in wave length as light source, and the reaction time was held at 4 h. The major products were formic acid and formaldehyde; the production rates were 4.53 μmol g−1h−1 and 0.62 μmol g−1h−1 for formic acid and formaldehyde, respectively. Carbon monoxide and methane were detected in trace amounts. The occurrence of the photo-reduction with Co3O4 is against the expectation from the valence band edge of Co3O4 in the literature. Possible causes for the contradictory result are discussed.
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Mendoza, J.A., Kim, H.K., Park, H.K. et al. Photocatalytic reduction of carbon dioxide using Co3O4 nanoparticles under visible light irradiation. Korean J. Chem. Eng. 29, 1483–1486 (2012). https://doi.org/10.1007/s11814-012-0115-z
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DOI: https://doi.org/10.1007/s11814-012-0115-z