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We reported a simple protocol to prepare a novel carbonaceous solid acid (CSA) with SiO2 from a mixture of rice husk and phenol by using small amount of sulfuric acid while stirring and heating for dehydration, sulfonation and carbonation at 240°C for 2h. It was found that adding phenol was vital for enhancing properties of the obtained CSA, and the CSA was efficient and recyclable catalyst for production...
We reported a simple route to prepare strong solid protonic acids (SPAs) from waste expanded polystyrene using a small amount of sulfuric acids while stirring at 130°C for 3h followed by heating at 220 or 260°C, respectively, for 2h. Such SPAs were amorphous carbon materials. It was found that they were efficient and recyclable catalysts for acid-catalyzed esterification reaction. Meanwhile, luminescent...
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