School of Life Sciences, and §School of Engineering, Anhui Agricultural University , 130 Changjiang West Road, Hefei, Anhui 230036, People's Republic of China.
J Agric Food Chem. 2014 Jun 11;62(23):5345-53. doi: 10.1021/jf500490m. Epub 2014 May 28.
Novel corncob-derived solid acid catalysts were successfully synthesized for the first time by the hydrothermal method. The influences of different preparation conditions were investigated, and the structure-function relationships of the resulting catalysts were also discussed on the basis of the analysis of structure and composition. In comparison to conventional solid acid catalysts, the corncob-derived catalyst synthesized under optimized conditions exhibited higher catalytic activity in esterification reactions, yielding nearly 90% methyl oleate in only 2 h. The catalyst retained satisfactory catalytic activity for esterification, even after 8 reaction cycles. Solid-state magic angle spinning (MAS) (13)C nuclear magnetic resonance (NMR) investigations further indicated that the catalyst was composed of polycyclic aromatic carbon sheets bearing -SO3H, -COOH, and -OH groups in adequate amounts and with proper proportions, contributing to its excellent catalytic activity. This work provides a green method to synthesize solid acid catalysts from biomass wastes and may contribute to a holistic approach for biomass conversion.
首次通过水热法成功合成了新型的玉米芯衍生固体酸催化剂。考察了不同制备条件的影响，并通过结构和组成分析讨论了所得催化剂的结构-功能关系。与传统的固体酸催化剂相比，在优化条件下合成的玉米芯衍生催化剂在酯化反应中表现出更高的催化活性，仅在 2 小时内即可得到近 90%的油酸甲酯。该催化剂在酯化反应中保持了令人满意的催化活性，即使经过 8 次反应循环也是如此。固态魔角旋转（MAS）（13）C 核磁共振（NMR）研究进一步表明，催化剂由具有足够数量和适当比例的多环芳烃碳片组成，负载-SO3H、-COOH 和-OH 基团，这有助于其优异的催化活性。这项工作为从生物质废料中合成固体酸催化剂提供了一种绿色方法，可能有助于实现生物质转化的整体方法。
