Low‐Temperature Preparation of a Mesoporous Silica Superbase by Employing the Multifunctionality of a La2O3 Interlayer. Issue 9 (8th February 2017)

• Record Type: Journal Article
• Authors: Liu, Ning; Wu, Zhimin; Li, Meng; Li, Shanshan; Luo, Zhantao; Li, Yongfei; Pan, Langsheng; Liu, Yuejin
• Is Part Of: ChemCatChem. Volume 9:Issue 9(2017)
• Page Start: 1641
• Page End: 1647
• Publication Date: 2017-02-08
• Subjects: basicity -- fluorides -- lanthanum -- mesoporous materials -- silicates; Catalysis -- Periodicals; 541.39505
• DOI: 10.1002/cctc.201601246
• Languages: English
• ISSNs: 1867-3880

Abstract

Abstract: A simple and effective approach for the preparation of the solid superbasic La2 O3 –SBA‐15‐supported KF (KF/La2 O3 –SBA‐15) was developed by a low‐temperature strategy. The KF/La2 O3 –SBA‐15 with ordered mesostructure and a high base strength ( H − =27.0) was realized at 350 °C in still air, which breaks the traditional method of thermally induced decomposition of basic metal nitrate derived species KNO3 under higher temperatures (>600 °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. Abstract : Resisting the structural collapse : Mesostructured superbasic sites were generated by employing the formation of La2 O3 –SBA‐15‐supported KF through thermal treatment at a low activation temperature of 350 °C under air atmosphere.