Photocatalytic Activity of ZnO-Biochar Hybrid Composites

J. Matos; R. Montana; E. Rivero; J. Velasco; G. Ledezma

doi:10.18321/ectj16

Authors

J. Matos Department of Photocatalysis and Alternative Energies. Venezuelan Institute for Scientific Research (IVIC), 20632, Caracas 1020-A, Venezuela
R. Montana Department of Photocatalysis and Alternative Energies. Venezuelan Institute for Scientific Research (IVIC), 20632, Caracas 1020-A, Venezuela
E. Rivero Department of Photocatalysis and Alternative Energies. Venezuelan Institute for Scientific Research (IVIC), 20632, Caracas 1020-A, Venezuela
J. Velasco Department of Photocatalysis and Alternative Energies. Venezuelan Institute for Scientific Research (IVIC), 20632, Caracas 1020-A, Venezuela
G. Ledezma Department of Photocatalysis and Alternative Energies. Venezuelan Institute for Scientific Research (IVIC), 20632, Caracas 1020-A, Venezuela

DOI:

https://doi.org/10.18321/ectj16

Abstract

Photodegradation of methylene blue (MB) was studied on ZnO in presence of home-made biochars prepared by different methods. MB photodegradation was performed under UV-visible irradiation to verify the scaling-up of ZnO-AC hybrid materials. It was verified that oxygenated surface groups on carbon were photochemically active in the photodegradation of MB and a synergy effect between both solids has been estimated from the first-order apparent rate-constants. This effect enhances the photoactivity of ZnO up to a factor about 2.5 and the difference in photoactivity in the binary materials was associated to the surface properties of AC.

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