Highly Effective Delamination of Kaolinite and Emergence of a Novel Nanoclub-like Crystal

The delamination of kaolinite was performed via the combination of intercalation and sonication. The morphology including shape, size, and crystal structure before and after the treatment were investigated by using XRD, SEM, TEM and SED （selective electron diffraction）. The results not only show that the particle size is significantly reduced after short time sonication treatment, such as BET area up to 52.29 m^2/g after only 1 h sonication treatment, but also indicate that the treated particles keep good crystal structure. A new aluminum silicate nanoclub-like crystal formed after sonication treatment.

插层-超声复合法制备高岭石纳米晶体及棒状晶体的出现

本文采用一种新型的复合方法制备高岭石纳米晶体。采用插层法和超声法相结合对高岭石进行剥片,先用吸潮法制备出高岭石/醋酸钾的插层复合物,再对插层复合物进行超声处理。利用X射线衍射、扫描电子显微镜、透射电子显微镜和电子衍射研究了剥片前后高岭石形状、大小及其结构的变化。实验结果表明,在1小时的超声处理后就已达到明显的剥片效果,BET测试比表面积从8.24m2/g达到52.29m2/g;同时处理后的高岭石颗粒保持了完整的晶体结构。另外,超声处理后发现部分高岭石晶体出现了新型纳米棒状结构。