Zr基MOFs在大气压等离子体中稳定性的研究

doi:10.11896/cldb.19090031

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Abstract Zr-based metal-organic frameworks (Zr-MOFs) are widely applied in gas storage and separation, drug delivery, chemical sensing and catalysis, due to their good stability in heat, acid and alkali solutions. They have been used in the process of plasma catalysis, recently. In this work, the stability of three typical Zr-based MOFs (UiO-66, UiO-67, UiO-66-NH₂) were studied in the atmospheric-pressure dielectric barrier discharge (DBD) plasma. The structure and specific surface area of the samples were characterized by X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FTIR) and N₂ sorption analysis (BET). The results show that UiO-66 exhibits the best stability among the three typical Zr-MOFs in the DBD plasma. The framework of UiO-67 is damaged after DBD plasma treatment, and UiO-66-NH₂ is destroyed seriously. The specific surface areas of UiO-67 and UiO-66-NH₂ after plasma treatment are only 19.0% and 3.1% of those before plasma treatment. These indicate that UiO-67 and UiO-66-NH₂ cannot exist stably in the DBD plasma when using CO₂ and H₂ mixture as working gas. For comparison, the XRD characteristic peaks of UiO-66 before and after plasma treatment are basically consistent, and the specific surface area after plasma treatment is 80.2% of that before plasma treatment. UiO-66 can maintain its framework structure under discharge voltage of 11.4—19.1 kV for 0.5—3 h, suggesting that UiO-66 has good stability in plasma.

Key words： Zr-based metal-organic frameworks (Zr-MOFs) dielectric barrier discharge (DBD) plasma stability

Published: 24 July 2020

CLC number:

TB33

Fund:This work was financially supported by the National Natural Science Foundation of China (21673026, 21773020), Graduate Education and Teaching Reform Fund of Dalian University.

About author:: Weiwei Xuis a master student in the College of Physical Science and Technology at Dalian University. He received his Bachelor degree in Polymer Materials from Jilin Institute of Chemical Technology in 2017. His research interests are focused on AP cold plasma assisted metal catalysts and their energy and environmental applications.
Lanbo Diis a professor in the College of Physical Science and Technology at Dalian University. He received his Ph.D. degree in Plasma Physics from Dalian University of Technology in 2012. His research interests are focused on AP cold plasma for synthesizing supported metal catalysts and their energy and environmental applications, gas-liquid discharge, as well as plasma enhanced chemical vapor deposition (PECVD). He won the first Dalian Youth Science and Technology award in 2014. He has been selected as thousand-level of Liaoning BaiQianWan Talents and the candidate of the Eni Award.
Xiuling Zhangis a professor in the College of Physical Science and Technology at Dalian University. She received her Master degree (1998) and Ph.D. degree (2002) in Applied Chemistry from Dalian University of Technology. Her research interests are focused on Greenhouse gas conversion by plasma, gas-liquid discharge, Ionic liquid, MOF, as well as functional nanomaterials enhanced fabrication by AP cold plasma. She was selected as the hundred-level of the hundred-level of Liaoning BaiQianWan Talents (2007) and Outstanding Teacher of Liao-ning Province (2012).

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	XU Weiwei
	DONG Mengyue
	ZHAO Jing
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	ZHANG Xiuling

Cite this article:

XU Weiwei,DONG Mengyue,ZHAO Jing, et al. Stability of Zr-based MOFs in Atmospheric-Pressure Plasma[J]. Materials Reports, 2020, 34(16): 16104-16108.

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http://www.mater-rep.com/EN/10.11896/cldb.19090031 OR http://www.mater-rep.com/EN/Y2020/V34/I16/16104

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