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Abstract
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Biochar is a highly porous, carbon-based material produced from a range of different feedstock biomass, usually either vegetal or animal waste, under low-oxygen conditions that has significant aromatiztion and anti-decomposition capabilities. Biochar is reported to have a high specific surface area and contain a wide variety of negative surface functional groups (e.g., hydroxyl, carboxyl, amino), and therefore it has gained the interest of the scientific community in a multifunctional fields such as support for catalysis sythesis [1]. Novel catalyst based on zinc oxide on biochar is prepared through a simple route and is proposed for the synthesis of tetrahydrobenzo[a]xanthen-11-one derivatives [2]. Highly effective ZnO/biochar catalyzed solvent-free synthesis of some tetrahydrobenzo[a]xanthen- 11-one derivatives via one-pot multi-component reaction of aldehydes, 2-naphthol and dimedone. The salient features of this nanocomposite as catalyst are: easy preparation, costeffective, high stability and reusability of the catalyst [3].
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