4.7 Article

Design of Amine-Modified Zr-Mg Mixed Oxide Aerogel Nanoarchitectonics with Dual Lewis Acidic and Basic Sites for CO2/Propylene Oxide Cycloaddition Reactions

期刊

NANOMATERIALS
卷 12, 期 19, 页码 -

出版社

MDPI
DOI: 10.3390/nano12193442

关键词

carbon dioxide; Zr-Mg mixed oxide aerogel; cycloaddition reaction; Lewis acid; Lewis base

资金

  1. National Science and Technology Council (NSTC, Taiwan) [107-2628-E-033-070-MY3, 111-2221-E-033-005-MY3]

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Novel heterogeneous catalysts with both Lewis acidic and basic sites were developed for the CO2/epoxide cycloaddition reaction without the need for toxic solvents. By grafting APTMS onto Zr-Mg mixed oxide aerogels, the yield of propylene carbonate reached 93.1%, indicating great potential for future industrial applications in CO2 reduction.
The utilization of CO2 attracts much research attention because of global warming. The CO2/epoxide cycloaddition reaction is one technique of CO2 utilization. However, homogeneous catalysts with both Lewis acidic and basic and toxic solvents, such as DMF, are needed in the CO2/epoxide cycloaddition reaction. As a result, this study focuses on the development of heterogeneous catalysts with both Lewis acidic and basic sites for the CO2 utilization of the CO2/epoxide cycloaddition reactions without the addition of a DMF toxic solvent. For the first time, the Zr-Mg mixed oxide aerogels with Lewis acidic and basic sites are synthesized for the CO2/propylene oxide (PO) cycloaddition reactions. To further increase the basic sites, 3-Aminopropyl trimethoxysilane (APTMS) with -NH2 functional group is successfully grafted on the Zr-Mg mixed oxide aerogels. The results indicate that the highest yield of propylene carbonate (PC) is 93.1% using the as-developed APTMS-modified Zr-Mg mixed oxide aerogels. The as-prepared APTMS-modified Zr-Mg mixed oxide aerogels are great potential in industrial plants for CO2 reduction in the future.

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