کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
5463873 | 1517191 | 2017 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Comparison of the hydrothermal stability of ZIF-8 nanocrystals and polycrystalline membranes derived from zinc salt variations
دانلود مقاله + سفارش ترجمه
دانلود مقاله ISI انگلیسی
رایگان برای ایرانیان
کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فناوری نانو (نانو تکنولوژی)
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Zeolitic-imidazolate framework-8 (ZIF-8), a representative member of the ZIF class, have attracted extensive application in gas adsorption, membrane separation and catalysis. Since the discovery of ZIF-8, they are always synthesized from zinc nitrate. In this work, we evaluate the hydrothermal stability of ZIF-8 nanocrystals and polycrystalline membranes synthesized from four kinds of common zinc salts. Several physical techniques (X-ray diffraction, scanning electron microscope, and nitrogen adsorption) indicate that ZIF-8 nanocrystals derived from zinc acetate, rather than zinc nitrate, exhibit the highest hydrothermal stability. After immersed in water (â¼3 wt%) at 80 °C for 10 days, nanocrystals derived from zinc acetate still could sustain â¼45% relative crystallinity, whereas those from zinc nitrate were transformed to amorphous products. The polycrystalline membrane derived from zinc acetate also exhibits the highest dynamic hydrothermal stability. This work is benefit to the synthesis of ZIF-8 materials for application in water-sensitive systems.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Letters - Volume 197, 15 June 2017, Pages 184-187
Journal: Materials Letters - Volume 197, 15 June 2017, Pages 184-187
نویسندگان
Luqian Sheng, Fan Yang, Chongqing Wang, Jian Yu, Lixiong Zhang, Yichang Pan,