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