Adsorption properties in high optical quality nanoZIF-8 thin films with tunable thickness
Adsorption properties in high optical quality nanoZIF-8 thin films with tunable thickness
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DOI：
10.1039/c0jm00500b
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发表时间：
2010-01-01
影响因子：
--
通讯作者：
Sanchez, Clement
中科院分区：
文献类型：
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作者：
Demessence, Aude;Boissiere, Cedric;Sanchez, Clement
我们报告了通过微孔ZIF-8纳米颗粒分散体的化学溶液沉积来处理薄膜。通过使用在浸涂过程中涉及的排水和毛细管制度，我们调整的膜的厚度从40 nm到1 mm，并控制在基板上的纳米粒子的包装。高光学质量的薄膜显示出双重层次的多孔结构，从微孔的框架和介孔空隙。此外，已经通过椭圆偏振孔隙率法评估了基于微孔ZIF-8的薄膜的蒸气吸附性能。疏水膜显示出醇、THF和烃的吸附。异丙醇/水分离的实验已经进行，并且醇对水的选择性吸附使得这些薄膜成为蒸气传感器的良好候选者。
We report processing of a thin film by chemical solution deposition of a microporous ZIF-8 nanoparticle dispersion. By using the drain and capillary regimes involved in the dip-coating process, we tuned the thickness of the films from 40 nm to 1 mm and controlled the packing of the nanoparticles on the substrate. The high optical quality thin films show a dual hierarchical porous structure from the micropores of the framework and the mesoporous interparticular voids. Moreover, vapor sorption properties of the microporous ZIF-8 based thin films have been evaluated by ellipsometric porosimetry. The hydrophobic films show alcohol, THF and hydrocarbon adsorption. Experiments for isopropanol/water separation have been carried out and the selective adsorption of the alcohol versus the water makes these thin films good candidates for vapor sensors.