Synthesis and hydrogen storage studies of metal‑organic framework UiO-66
Abstract
Metal‑organic framework UiO-66 has high chemical and thermal stability. However, it is difficult to produce such Zr-based MOFs with good crystalline morphology. Here, highly pure metal‑organic framework UiO-66 has been synthesized at low temperature (50 °C). The as-synthesized sample has been characterized by X-ray diffraction, thermogravimetric analysis, nitrogen adsorption, and scanning electron microscopy. Its hydrogen-storage capacity has been measured by means of an Intelligent Gravimetric Analyser. The results showed that UiO-66 was synthesized in octahedral crystals of well-defined sizes (150‑200 nm) and had a high specific surface area (1358 m2/g). The as-synthesized UiO-66 showed a significant hydrogen uptake even at a moderate pressure, which increased to 3.35 wt% at 77 K and 1.8 MPa. A grand canonical Monte Carlo simulation (GCMC) has been employed to calculate the adsorption of hydrogen in UiO-66. The result of this simulation provided a theoretical foundation for the experimental results.
- Publication:
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International Journal of Hydrogen Energy
- Pub Date:
- September 2013
- DOI:
- 10.1016/j.ijhydene.2013.01.163
- Bibcode:
- 2013IJHE...3813104Z
- Keywords:
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- Metal‑organic framework;
- UiO-66;
- Synthesis;
- Hydrogen storage;
- Simulation