Metallosurfactant Ionogels in Imidazolium and Protic Ionic Liquids as Precursors To Synthesize Nanoceria as Catalase Mimetics for the Catalytic Decomposition of H₂O₂

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• 作者：Xiaolin Wang ; Qiao Yang ; Yixue Cao ; Haibin Hao ; Junhan Zhou and Prof. Dr. Jingcheng Hao
• 刊名：Chemistry - A European Journal
• 出版年：2016
• 出版时间：December 5, 2016
• 年：2016
• 卷：22
• 期：49
• 页码：17857-17865
• 全文大小：2070K
• ISSN：1521-3765

文摘

The gelation behavior of cationic surfactants with different counterions, Br⁻, [FeCl₃Br]⁻, and [CeCl₃Br]⁻, in imidazolium ionic liquids (ILs) and protic ethylammonium nitrate was investigated. Small-angle X-ray scattering measurements and freeze-fracture transmission electron microscopy observations revealed the lamellar phases of metallosurfactant ionogels. The characteristics of imidazolium ILs, including the size and type, have effects on metallosurfactant ionogel properties, such as transformation temperatures, interlayer spacing, and mechanical strength. Cubic fluorite structured cerium oxide nanoparticles (CeO₂ NPs) were produced by using metallosurfactant ionogels as precursors. Cubic fluorite CeO₂ exhibited good catalase mimetic activity toward H₂O₂ to generate O₂, providing more multiple mimetic enzyme activities of CeO₂ NPs for H₂O₂.