کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1646578 | 1517305 | 2012 | 4 صفحه PDF | دانلود رایگان |
Thermally and chemically stable zeolitic imidazolate framework (ZIF) materials have attracted extensive application in gas adsorption and catalysis. Nano-sized ZIF-67 crystals (228 nm) were for the first time synthesized in aqueous solutions at room temperature. As-synthesized crystals were investigated by X-ray diffraction, field-emission scanning electron microscope, thermal gravimetric analysis, gas adsorption measurement. It was found that ZIF-67 nanocrystals were highly stable up to 350 °C and could be stable in boiling methanol at least for 5 days. Furthermore, the concentration of reagents plays an important role in controlling particle size, and diluting the synthesis solution can increase the particle size of final products.
► ZIF-67 nanocrystals were hydrothermally synthesized at room temperature.
► ZIF-67 nanocrystals are highly thermally and chemically stable.
► The particle sizes of ZIF-67 crystals can be adjusted from 228 nm to 5.2 μm.
Journal: Materials Letters - Volume 82, 1 September 2012, Pages 220–223