Synthesis of aqueous nanodispersed nanocrysralline ceria suspensions by a novel organic/inorganic precipitation method

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• 作者：I. Kitsou ; E. Roussi ; A. Tsetsekou ; ^{athtse@metal.ntua.gr}
• 关键词：Ceria ; Nanodispersed suspension ; Nanocrystallinity ; Precipitation ; Hyperbranched poly(ethylene)imine ; Carboxy-methylated poly(ethylene)imine
• 刊名：Ceramics International
• 出版年：2017
• 出版时间：March 2017
• 年：2017
• 卷：43
• 期：4
• 页码：3861-3865
• 全文大小：970 K
• 卷排序：43

文摘

A low cost and environmentally friendly methodology was developed to produce highly stable, nanodispersed, aqueous suspensions of uniform CeO2 nanocrystals with a mean size at around 5 nm. The synthesis is a hybrid precipitation route that takes place at room temperature from a cerium nitrate solution in the presence of a functional polymer that can act both as complexing and dispersing agent. A hyperbranched poly(ethylene)imine (PEI) or the sodium salt of carboxy-methylated poly(ethylene)imine (Trilon P) were investigated for this purpose with very positive results concerning the stability and the dispersion degree of ceria. Between them, the nanoceria suspensions containing the Trilon P are extremely stable and almost monodispersed, whereas PEI based suspensions show loose nanosized agglomerates according to TEM and even DLS measurements.