Low-Temperature Preparation of a Mesoporous Silica Superbase by Employing the Multifunctionality of a La2O3 Interlayer
Low-Temperature Preparation of a Mesoporous Silica Superbase by Employing the Multifunctionality of a La2O3 Interlayer
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利用La2O3中间层的多功能性低温制备介孔二氧化硅超级基底
DOI：
10.1002/cctc.201601246
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发表时间：
2017-05-10
期刊：
影响因子：
4.5
通讯作者：
Liu, Yuejin
中科院分区：
文献类型：
--
作者：
Liu, Ning;Wu, Zhimin;Liu, Yuejin
采用低温合成法制备了La2O3-SBA-15负载KF（KF/La2O3-SBA-15）固体超强碱。在350 ℃的静止空气中实现了具有有序介观结构和高碱强度（H = 27.0）的KF/La2O3-SBA-15，这打破了在较高温度（> 600 ℃）下碱金属硝酸盐衍生物KNO3的热诱导分解的传统方法。以环氧丙烷和甲醇为原料合成了1-甲氧基-2-丙醇。该催化剂具有优良的催化性能，环氧丙烷转化率为93%，1-甲氧基-2-丙醇选择性为93%。该性能优于不含介孔二氧化硅的催化剂，尽管具有较高的KF含量。
A simple and effective approach for the preparation of the solid superbasic La2O3-SBA-15-supported KF (KF/La2O3-SBA-15) was developed by a low-temperature strategy. The KF/La2O3-SBA-15 with ordered mesostructure and a high base strength (H = 27.0) was realized at 350 degrees C in still air, which breaks the traditional method of thermally induced decomposition of basic metal nitrate derived species KNO3 under higher temperatures (> 600 degrees C). The resultant mesoporous basic materials were adopted for the production of 1-methoxy-2-propanol from propylene oxide and methanol. It showed excellent catalytic performance exhibiting 93% conversion of propylene oxide and 93% selectivity to 1-methoxy-2-propanol. This performance is better than that over the catalysts without mesoporous silica despite having a higher KF content.