Fabrication of magnetic carbonaceous solid acids from banana peel for the esterification of oleic acid
Fabrication of magnetic carbonaceous solid acids from banana peel for the esterification of oleic acid
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香蕉皮制备磁性碳质固体酸用于油酸酯化
DOI：
10.1039/c5ra15767f
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发表时间：
2015-11
期刊：
影响因子：
3.9
通讯作者：
Zhang, Zhi-Qi
中科院分区：
文献类型：
--
作者：
An, Lei;Ma, Jin;Zhang, Ji-Fang;Zhang, Zhi-Qi
磁性碳质固体酸(MCSA)是一种具有许多实际和研究应用的重要材料，近年来受到人们的广泛关注。本工作采用一种简单的方法合成了一种具有超顺磁性的MCSA，即利用废香蕉皮(BP)快速热解Fe(III)络合物和气相磺化相结合的方法。通过简单地改变Fe(III)离子的用量，这种通用的策略可以简单地制备比表面积(1561097m2 g−1)和孔体积(0.17cm3g−1)和相对较大的平均介孔尺寸(6.111.4 nm)的MCSA。在相同条件下，所制备的MCSA对油酸和甲醇的酯化反应具有良好的催化活性，远远高于商业Amberlyst-15、磺化活性炭和铌酸的催化活性。特别是，所得MCSA的催化活性可与均相H_2SO_4催化剂相媲美。本工作提供了一种廉价且环境友好的方法来从废弃的BP中合成MCSA，并可能有助于生物质转化的整体方法。
Magnetic carbonaceous solid acids (MCSAs), which are important materials with many practical and research applications, have recently attracted much attention. In this work, a valuable type of MCSA with superparamagnetism was synthesized using a facile strategy, i.e., integrated fast pyrolysis of Fe(III)-based complexes and vapor-phase sulfonation from waste banana peel (BP). This versatile strategy enables the simple preparation of MCSAs with easily tunable surface areas (156–1097 m2 g−1) and pore volumes (0.17–0.74 cm3 g−1), and relatively large average mesoporous sizes (6.1–11.4 nm), by simply varying the dosage of Fe(III) ions. The as-prepared MCSAs have excellent catalytic activity in the esterification of oleic acid with methanol, far higher than that of the commercial Amberlyst-15, sulfonated activated carbon and niobic acid under the same conditions. In particular, the catalytic activity of the obtained MCSAs rivals that of a homogeneous H2SO4 catalyst. The present work provides an inexpensive and environmentally friendly method to synthesize MCSAs from waste BP and may contribute to a holistic approach for biomass conversion.
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