(1. 江苏大学 材料科学与工程学院，镇江 212013；
2. 常州大学 材料科学与工程学院，常州 213164；
3. 常州大学 江苏省材料表面科学与技术重点实验室，常州 213164；
4. 苏州科技学院 化学生物与材料工程学院，苏州 215009)
摘 要: 采用微波均相沉淀法合成CeO2/凹凸棒石复合材料；借助热重(TG)/差示扫描量热(DSC)分析仪、X射线粉末衍射(XRD)、透射电子显微镜(TEM)附带能谱(EDS)仪、选区电子衍射(SAED)、拉曼(Raman)光谱和傅里叶红外光谱(FT-IR)等测试手段对复合材料进行表征；研究CeO2负载量和反应温度对复合材料结构、形貌和催化氧化性能的影响，并且对复合材料的形成机理进行分析。结果表明：当CeO2负载量为50%(CeO2与凹凸棒石的质量分数)，微波反应温度为100 ℃时，经450 ℃煅烧，CeO2纳米颗粒可以较好地分散在凹凸棒石表面；当使用此复合材料作为催化剂，其对亚甲基蓝的脱色率可达到96%。
关键字: 复合材料；二氧化铈；凹凸棒石；微波均相合成；催化性能
（1. School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China;
2. School of Materials Science and Engineering, Changzhou University, Changzhou 213164, China;
3. Jiangsu Key Laboratory of Materials Surface Science and Technology, Changzhou University,
Changzhou 213164, China;
4. School of Chemistry Biology and Materials Engineering, Suzhou University of Science and Technology,
Suzhou 215009, China）
Abstract:CeO2/palygorskite composites were synthesized by the microwave homogeneous precipitation method. Thermogravimetry (TD)/differential scanning calorimetry (DSC) analysis, powder X-ray diffractometry (XRD), transmission electron microscopy (TEM) with energy-dispersive spectroscope (EDS), selected area electron diffraction (SAED), Raman spectroscopy and Fourier transform infrared spectrometer (FT-IR) tests were used to characterize the composites. The effects of CeO2 loading amount and reaction temperature on the structure, morphology and catalytic performance of the composites were investigated. The formation mechanism of the composite was also studied. The result shows that at CeO2 loading of 50% (mass fraction of CeO2 to polygorskite), microwave reaction temperature of 100 ℃ and calcination temperature of 450 ℃, the CeO2 nanoparticles distribute well on the surface of the palygorskite. When the composite is used as the catalyst, the decolorization ratio of methylene blue can reach 96%.
Key words: composite; CeO2; palygorskite; microwave homogeneous synthesis; catalysis performance
