Mechanism of zeolite a nanocrystal growth from colloids at room temperature
Mechanism of zeolite a nanocrystal growth from colloids at room temperature
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DOI：
10.1126/science.283.5404.958
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发表时间：
1999-02-12
期刊：
影响因子：
56.9
通讯作者：
Bein, T
中科院分区：
文献类型：
--
作者：
Mintova, S;Olson, NH;Bein, T
采用低剂量、高分辨率场发射透射电镜和原位动态光散射技术，研究了室温下透明溶液中A沸石晶核的形成和生长。单沸石A晶体在室温下3天内成核成40 ~ 80纳米的无定形凝胶颗粒。所得的纳米级单晶（10 ~ 30纳米）被嵌入到非晶凝胶颗粒中。在室温下，凝胶颗粒在进一步的晶体生长过程中被消耗，形成40至80纳米的沸石a纳米晶体的胶体悬浮液。在80℃加热该悬浮液时，溶液介导的运输导致了额外的大量晶体生长。
The formation and growth of crystal nuclei of zeolite A from clear solutions at room temperature were studied with Low-dose, high-resolution transmission electron microscopy in field emission mode and with in situ dynamic Light scattering. Single zeolite A crystals nucleated in amorphous gel particles of 40 to 80 nanometers within 3 days at room temperature. The resulting nanoscale single crystals (10 to 30 nanometers) were embedded in the amorphous gel particles. The gel particles were consumed during further crystal growth at room temperature, forming a colloidal suspension of zeolite A nanocrystals of 40 to 80 nanometers, On heating this suspension at 80 degrees C, solution-mediated transport resulted in additional substantial crystal growth.