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Real-time analysis of MOF adsorption behavior

Date:
June 19, 2019
Source:
The Korea Advanced Institute of Science and Technology (KAIST)
Summary:
Researchers have developed a technology to analyze the adsorption behavior of molecules in each individual pore of a metal organic framework (MOF). This system has large specific surface areas, allowing for the real-time observation of the adsorption process of an MOF, a new material effective for sorting carbon dioxide, hydrogen, and methane.
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Researchers have developed a technology to analyze the adsorption behavior of molecules in each individual pore of a metal organic framework (MOF). This system has large specific surface areas, allowing for the real-time observation of the adsorption process of an MOF, a new material effective for sorting carbon dioxide, hydrogen, and methane.

Accurate measurements and assessments of gas adsorption isotherms are important for characterizing porous materials and developing their applications. The existing technology is only able to measure the amount of gas molecules adsorbed to the material, without directly observing the adsorption behavior.

The research team led by Professor Jeung Ku Kang from the Graduate School of Energy, Environment, Water and Sustainability (EEWS) prescribed a real time gas adsorption crystallography system by integrating an existing X-ray diffraction (XRD) measurement device that can provide structural information and a gas adsorption measurement device.

Specifically, the system allowed the observation of a mesoporous MOF that has multiple pores rather than a single pore structure. The research team categorized the adsorption behaviors of MOF molecules by pore type, followed by observations and measurements, resulting in the identification of a stepwise adsorption process that was previously not possible to analyze.

Further, the team systematically and quantitatively analyzed how the pore structure and the type of adsorption molecule affect the adsorption behavior to suggest what type of MOF structure is appropriate as a storage material for each type of adsorption behavior.

Professor Kang said, "We quantitatively analyzed each pore molecule in real time to identify the effects of chemical and structural properties of pores on adsorption behavior." He continued, "By understanding the real-time adsorption behavior of molecules at the level of the pores that form the material, rather than the whole material, we will be able to apply this technology to develop a new high-capacity storage material."


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Materials provided by The Korea Advanced Institute of Science and Technology (KAIST). Note: Content may be edited for style and length.


Journal Reference:

  1. Hae Sung Cho, Jingjing Yang, Xuan Gong, Yue-Biao Zhang, Koichi Momma, Bert M. Weckhuysen, Hexiang Deng, Jeung Ku Kang, Omar M. Yaghi, Osamu Terasaki. Isotherms of individual pores by gas adsorption crystallography. Nature Chemistry, 2019; 11 (6): 562 DOI: 10.1038/s41557-019-0257-2

Cite This Page:

The Korea Advanced Institute of Science and Technology (KAIST). "Real-time analysis of MOF adsorption behavior." ScienceDaily. ScienceDaily, 19 June 2019. <www.sciencedaily.com/releases/2019/06/190619094847.htm>.
The Korea Advanced Institute of Science and Technology (KAIST). (2019, June 19). Real-time analysis of MOF adsorption behavior. ScienceDaily. Retrieved April 22, 2024 from www.sciencedaily.com/releases/2019/06/190619094847.htm
The Korea Advanced Institute of Science and Technology (KAIST). "Real-time analysis of MOF adsorption behavior." ScienceDaily. www.sciencedaily.com/releases/2019/06/190619094847.htm (accessed April 22, 2024).

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