单晶菱形CeOHCO3片状物的制备及其向CeO2的热转换(英文) |
Single-Crystalline CeOHCO3 with Rhombic Morphology: Synthesis and Thermal Conversion to CeO2 |
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摘要: 以硝酸铈铵和尿素为反应物,γ-氨丙基三乙氧基硅烷(KH550)为助剂,通过沉淀反应制得了单晶菱形CeOHCO3片状物。然后将CeOHCO3在600 ℃空气气氛中灼烧获得了菱形CeO2。通过XRD和SEM对反应物中是否含有KH550助剂所得的产物进行了分析,结果发现只有含有KH550才能获得菱形CeOHCO3片状物,并且在灼烧过程中产物的形貌仍保持菱形。然后采用TEM对菱形CeOHCO3和CeO2进行了表征,结果发现CeOHCO3为单晶产物而灼烧后所得的CeO2为多晶产物。 |
关键词: CeOHCO3 CeO2 KH550 菱形 沉淀法 |
基金项目: |
Abstract: Single-crystalline CeOHCO3 rhombic micro-plates with an orthorhombic structure were synthesized by the precipitation reaction between (NH4)2Ce(NO3)6 and CO(NH)2 in the presence of 3-aminopropyltriethoxysilane (APS). Polycrystalline CeO2 rhombic micro-plates were prepared by thermal decomposition of single-crystalline CeOHCO3 rhombic micro-plates at 600 ℃ in air. CeOHCO3 and CeO2 rhombic micro-plates were characterized by XRD, filed-emission scanning electron microscopy (FESEM), TEM, and XPS. The results indicate that APS plays an important role in the preparation of single-crystalline CeOHCO3 rhombic micro-plates because the CeO2 is produced without APS. In addition, the rhombic shape of the products is not ruined apparently by the thermal conversion process from CeOHCO3 to CeO2. |
Keywords: CeOHCO3 CeO2 APS rhombic precipitation reaction |
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张泽芳,俞 磊,刘卫丽,宋志棠.单晶菱形CeOHCO3片状物的制备及其向CeO2的热转换(英文)[J].无机化学学报,2011,27(4):759-763. |
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