Hydrothermal Preparation and Characterization of Novel Corncob-Derived Solid Acid Catalysts
Hydrothermal Preparation and Characterization of Novel Corncob-Derived Solid Acid Catalysts
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DOI：
10.1021/jf500490m
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发表时间：
2014-06-11
影响因子：
6.1
通讯作者：
Zhu, Suwen
中科院分区：
文献类型：
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作者：
Ma, Huan;Li, Jiabao;Zhu, Suwen
首次用水热法合成了新型玉米芯固体酸催化剂。考察了不同制备条件对催化剂性能的影响，并通过对催化剂结构和组成的分析，探讨了催化剂的结构-功能关系。与传统固体酸催化剂相比，优化条件下合成的玉米芯催化剂对酯化反应具有更高的催化活性，在2 h内油酸甲酯的收率接近90%.该催化剂经8次循环后仍保持良好的酯化活性。固体魔角旋转（MAS）C-13核磁共振（NMR）研究进一步表明，该催化剂是由含有适量和适当比例的-SO 3 H、-COOH和-OH基团的多环芳族碳片组成，具有优异的催化活性。本研究为从生物质废弃物中合成固体酸催化剂提供了一种绿色的方法，并可能为生物质转化提供一种整体的方法。
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) C-13 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.