(1. 江蘇大學(xué) 材料科學(xué)與工程學(xué)院，鎮(zhèn)江 212013；
2. 常州大學(xué) 材料科學(xué)與工程學(xué)院，常州 213164；
3. 常州大學(xué) 江蘇省材料表面科學(xué)與技術(shù)重點(diǎn)實(shí)驗(yàn)室，常州 213164；
4. 蘇州科技學(xué)院 化學(xué)生物與材料工程學(xué)院，蘇州 215009)
摘 要: 采用微波均相沉淀法合成CeO2/凹凸棒石復(fù)合材料；借助熱重(TG)/差示掃描量熱(DSC)分析儀、X射線粉末衍射(XRD)、透射電子顯微鏡(TEM)附帶能譜(EDS)儀、選區(qū)電子衍射(SAED)、拉曼(Raman)光譜和傅里葉紅外光譜(FT-IR)等測試手段對復(fù)合材料進(jìn)行表征；研究CeO2負(fù)載量和反應(yīng)溫度對復(fù)合材料結(jié)構(gòu)、形貌和催化氧化性能的影響，并且對復(fù)合材料的形成機(jī)理進(jìn)行分析。結(jié)果表明：當(dāng)CeO2負(fù)載量為50%(CeO2與凹凸棒石的質(zhì)量分?jǐn)?shù))，微波反應(yīng)溫度為100 ℃時(shí)，經(jīng)450 ℃煅燒，CeO2納米顆粒可以較好地分散在凹凸棒石表面；當(dāng)使用此復(fù)合材料作為催化劑，其對亞甲基藍(lán)的脫色率可達(dá)到96%。
關(guān)鍵字: 復(fù)合材料；二氧化鈰；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
