Surface and Stability Characterization of a Nanoporous ZIF-8 Thin Film
| Autor: | Fangyuan Tian, Elizabeth R. Webster, Andrew M. Cerro, Aileen Park, Amber M. Mosier, Ryan S. Shine, Lewis E. Johnson, Malkiat S. Johal, Hannah K. Wayment-Steele, Lauren Benz |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Nanoporous Scanning electron microscope Analytical chemistry Nanoparticle Surfaces Coatings and Films Electronic Optical and Magnetic Materials General Energy Adsorption Chemical engineering X-ray photoelectron spectroscopy Thermal stability Physical and Theoretical Chemistry Thin film Zeolitic imidazolate framework |
| Zdroj: | The Journal of Physical Chemistry C. 118:14449-14456 |
| ISSN: | 1932-7455 1932-7447 |
| Popis: | Zeolitic imidazolate frameworks (ZIFs) have been widely investigated for numerous applications including energy storage, heterogeneous catalysis, and greenhouse gas adsorption. Much of the early work has focused on the bulk properties of microcrystalline ZIFs. Herein, we focus on identifying the nature of the surface of ZIF-8 by studying a supported ZIF-8 nanoparticle film using surface characterization techniques. We have experimentally identified the presence of a zinc-rich surface terminated by carbonates and water/hydroxyl groups (in addition to the expected methylimidazole terminations) using X-ray photoelectron spectroscopy (XPS). The thermal stability of ZIF-8 thin films was also investigated using scanning electron microscopy (SEM) and temperature-programmed reaction spectroscopy (TPRS). We determined the onset of decomposition of ZIF-8 thin films to be approximately 630 K using TPRS in an ultrahigh vacuum (UHV) environment. This work presents the first characterization steps needed to study the e... |
| Databáze: | OpenAIRE |
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