One-pot synthesis of potassium-loaded MgAl oxide as solid superbase catalyst for Knoevenagel condensation
作者： Jin Zhao , Jun Xie , Chak-Tong Au , Shuang-Feng Yin
DOI: 10.1016/J.APCATA.2013.06.054
关键词:
摘要: a b s t r c We report new strategy for one-pot synthesis of potassium-loaded MgAl oxides using KOH to adjust the pH value reaction system. The as-prepared solid superbases were studied by N2 physisorp- tion method, energy-dispersive X-ray spectroscopy, powder diffraction, and Fourier transform infrared. superbasic sites characterized use Hammett indicators CO2 temperature- programmed desorption. found that with base strength (H-) above 26.5, showed high catalytic activity Knoevenagel condensation at room temperature. Furthermore, higher superbasicity and/or more amount sites, better is activity. findings open up route functional composite as supports. © 2013 Elsevier B.V. All rights reserved.
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