High Catalytic Activity of Nitrogen-Containing Carbon from Molecular Sieves in Fine Chemistry
High Catalytic Activity of Nitrogen-Containing Carbon from Molecular Sieves in Fine Chemistry
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DOI：
10.1007/s10562-009-9928-8
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发表时间：
2009-03
影响因子：
2.8
通讯作者：
R. M. Freire;A. H. Morais Batista;A. G. Souza Filho;J. Filho;G. D. Saraiva;Alcineia C. Oliveira
中科院分区：
文献类型：
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作者：
R. M. Freire;A. H. Morais Batista;A. G. Souza Filho;J. Filho;G. D. Saraiva;Alcineia C. Oliveira
以MCM-41、MCM-22和FAU分子筛为原料，采用纳米浇铸技术制备了纳米结构的含氮碳（CN）。采用XRD、SEM、拉曼光谱、FTIR、XPS和N2吸附等温线等手段对CN的表面和形貌进行了表征。并对催化剂在精细化学反应中的催化活性进行了评价。胺功能化碳材料由于其结构特征和对Knoevenaguel缩合反应的高催化性能而具有潜在的重要性。此外，分子筛材料的结构从FAU到MCM-41的变化导致转化率从23%增加到80%。这可能与引入氮后的碱性活性位点以及为目标反应提供活性、选择性和稳定催化剂的有组织CN相关。MCM-41-CN的重复使用不影响目标产物的选择性。
Nanostructured nitrogen-containing carbon (CNs) were prepared by nanocasting techniques using MCM-41, MCM-22, and FAU molecular sieves. The surface and morphological features of CN were investigated by XRD, SEM, Raman spectroscopy, FTIR, XPS, and N2adsorption isotherms. The catalytic activity in a fine chemistry reaction was also evaluated. The amine-functionalized carbon materials studied are potentially of great importance because of their textural features and high catalytic performance towards Knoevenaguel condensation. In addition, variation of the structure of the molecular sieve material from FAU to MCM-41 led to an increase in the conversion from 23 to 80%. This may be correlated to the basic active sites upon incorporation of nitrogen and also an organized CN that provides active, selective, and stable catalysts to the target reaction. The re-use of the MCM-41-CN does not affect the selectivity of the desired product.