Hydrothermal synthesis of quartz nanocrystals
Hydrothermal synthesis of quartz nanocrystals
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DOI：
10.1021/nl025854r
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发表时间：
2003-05-01
期刊：
影响因子：
10.8
通讯作者：
Colvin, VL
中科院分区：
文献类型：
--
作者：
Bertone, JF;Cizeron, J;Colvin, VL
本文首次提出了一种制备纳米石英晶体的化学方法。亚微米石英粉末最初在水热反应中产生，其中可溶性二氧化硅前体沉淀为纯结晶二氧化硅。为了产生纳米晶体材料，可以通过透析、过滤和离心来纯化这些颗粒并选择尺寸。透射电子显微镜和X射线衍射表明产物是纯相α-石英，由分离的（即，非聚集的）纳米晶体。根据尺寸选择方法，可以回收平均尺寸为10至100纳米的微晶。
This paper describes for the first time a chemical method for the preparation for nanocrystalline quartz. Submicron quartz powders are initially produced in hydrothermal reactions where soluble silica precursors precipitate as pure crystalline silica. To yield nanocrystalline material these particles can be purified and size selected by dialysis, filtration, and centrifugation. Transmission electron microscopy and X-ray diffraction illustrate that the product is pure phase a-quartz, consisting of isolated (i.e., nonaggregated) nanocrystals. Depending on the size selection method, crystallites with average sizes of 10 to 100 nanometers can be recovered.