Nano sized ZSM-5 zeolite samples were synthesized successively from kaolin clay as alumina source having a large amount of quartz (39%) and silicic acid as silica source by hydrothermal treatment with NaOH in the presence of tetrapropylammonium hydroxide as a template. Then the effect of kaolin content, crystallization temperature and time on the size and crystallinity of the products were investigated. The prepared samples were characterized using XRD, SEM, EDS and FT-IR techniques. The results showed that the synthesized ZSM-5 zeolite samples were almost pure and their crystallization was almost complete. The average particle size, as determined by Debye-Scherrer equation, was in the range of 20-42 nm. Increasing kaolin content on crystal size was more effective than increase in crystallization temperature and time. Additional evidences for the nano sized ZSM-5 zeolite were the asymmetric stretch vibration band at 1225 cm^-1 in the FT-IR spectra and TEM images. The scanning electron micrographs of the synthesized zeolites showed that they are spherical shape crystals.

中文翻译：

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用高岭土制备和表征纳米ZSM-5分子筛以及研究高岭土含量，结晶时间和温度变化对产物尺寸和结晶度的影响

在氢氧化四丙基铵为模板的情况下，通过用NaOH进行水热处理，从高岭土粘土作为氧化铝源（大量石英（39％），硅酸作为二氧化硅源）连续合成了纳米级ZSM-5沸石样品。然后研究了高岭土含量，结晶温度和时间对产物尺寸和结晶度的影响。使用XRD，SEM，EDS和FT-IR技术对制备的样品进行表征。结果表明，合成的ZSM-5沸石样品几乎是纯净的，并且其结晶几乎已经完成。由Debye-Scherrer方程确定的平均粒径在20-42nm范围内。增加高岭土含量对晶体尺寸的作用比增加结晶温度和时间更有效。在FT-IR光谱和TEM图像中为^-1。合成沸石的扫描电子显微镜照片显示它们是球形晶体。