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以二甲基二乙基氢氧化铵(DEDMAOH)作为模板剂,通过水热合成方法制备了新型层状沸石材料UZM-8,并考查了DEDMAOH模板剂用量及投料硅铝比对UZM-8沸石结构的影响.采用X衍射(XRD)、扫描电子显微镜(SEM)、傅立叶变换红外(FT-IR)、热重分析(TG,DTG)等方法对所得系列UZM-8沸石进行了表征.该层状沸石具有与MCM-56相似的MWW结构,但层间距及其堆积方式等有所不同.当DEDMAOH/SiO2<0.3时,无法有效合成出UZM-8沸石.随硅铝比的提高,UZM-8在2θ角6.6°和7.1°处的两个衍射峰转变为一个峰,层间沿c轴方向收缩.
A novel layered zeolite material, UZM-8, was prepared by hydrothermal synthesis method using dimethyldiethyl ammonium hydroxide (DEDMAOH) as template. The effects of dosage of DEDMAOH template and ratio of silica to alumina on the thermal stability of UZM-8 zeolite Structure.The UZM-8 zeolites were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR) and thermal gravimetric analysis (TG, DTG) The zeolite has the MWW structure similar to that of MCM-56, but the interlayer spacing and the stacking mode are different. When DEDMAOH / SiO2 <0.3, UZM-8 zeolite can not be effectively synthesized. With the increase of Si / Al ratio, 8 The two diffraction peaks at 6.6 ° and 7.1 ° in the 2θ angle turn into one peak, and the layers contract along the c-axis.