摘要
以Ce（SO4）2·4H2O和NaOH为反应原料，聚乙二醇（PEG）作为表面活性剂起到分散和保护产品的作用，用新型的微波合成技术制备纳米CeO2。对微波制备纳米CeO2工艺中的影响因素进行了考察，并且作了正交优化设计实验，得到最佳制备工艺条件：PEG的反应体积为9mL，PEG的洗涤体积为7mL，无水乙醇的体积为10ml，微波恒压为0．14MPa．微波功率为232W，微波辐射时间为6min。采用红外光谱仪对产品进行定性分析，采用X-射线衍射仪分析其晶相结构，采用差热-热重联用分析仪对样品热稳定性进行分析，采用紫外可见分光光度计测定其吸光性能。实验结果表明，产品颗粒粒径为24．9nm，在280～400nm对紫外线具有较好的吸收，在400～800nm对可见光有较好的透光性。
Nanometer cerium dioxide particles were synthesized by using advanccd rnicrowave synthesis technology, the materials included Ce（SO4）2·4H2O and NaOH, the surfactant was polyglycol （PEG） which could disperse and protect the products. The effect factors in the process of preparing nanometer cerium dioxide by microwave were explored individually, and the orthogonal method was adopted to confirm the optimum process condition. The optimum process conditions include the reaction volume of PEG is 9 mL, the washing volume of PEG is 7 mL, the volume of absolute alcohol is 10 mL, the microwave constant pressure is 0.14 MPa, microwave power is 232 W, and the microwave radiation time is 6 minutes. The qualitative analysis of product was done by IR spectrum, the X - ray diffraction was used to investigate its crystalline phase and structure, the simultaneous TGA DTA instruments was used to study the thermal stability of the samples, the UV VIS spectrophotometer was used to measure its UV VIS absorption capability. Experiments reveal that the particle diameter is 24.9 nanometer; it exhibits excellent absorption capability between 280 and 400 nanometer in UV ray region and high transparency between 400 and 800 nanometer in the visible region.
出处
《辽宁石油化工大学学报》
CAS
2006年第1期12-15,共4页
Journal of Liaoning Petrochemical University
关键词
纳米
CEO2
微波
合成
表征
Nanometer
Cerium dioxide
Microwave
Synthesis
Characterization
