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Carbon Dioxide Adsorption Capacity of Alkali-metal Cation Dopped MIL125 |
SONG Lifang, YAN Jiahao, ZHANG Diankang, XUE Cheng, XIA Huiyun, NIU Yanhui( ) |
Engineering Research Center of Transportation Materials, Ministry of Education, School of Materials Science and Engineering, Chang'an University, Xi'an 710064, China |
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Cite this article:
SONG Lifang, YAN Jiahao, ZHANG Diankang, XUE Cheng, XIA Huiyun, NIU Yanhui. Carbon Dioxide Adsorption Capacity of Alkali-metal Cation Dopped MIL125. Chinese Journal of Materials Research, 2023, 37(9): 649-654.
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Abstract The metal-organic skeleton compound MIL125 was prepared with terephthalic acid and isopropyl titanate as raw materials, afterwards by post impregnating in alkaline metal chloride solution, a series of alkali metal cation-doped M@MIL125-t (M: Li+, Na+, K+; t: 6 h, 9 h, 12 h) were obtained. They were characterized by X-ray diffractometer, Fourier transform infrared spectroscopy and field emission scanning electron microscopy. Their specific surface area and CO2 adsorption capacity were assessed by nitrogen isothermal adsorption-desorption curve and CO2 adsorption curve measurements. The results showed that being impregnated with alkali metal chloride solution, the structure and crystal form of MIL125 has not changed significantly. The surface and pores of MIL125 grain was corroded by the impregnation solution, and the specific surface area increased first and then decreased. The optimum impregnation time of MIL125 in the three alkali metal chloride solutions was 9 h. When doped with Na+ by impregnating for 9 h, the maximum specific surface area is up to 2497 m2/g, which is 81.5% higher than that of blank MIL125, and the CO2 adsorption amount is 1.41 mmol/g, which is 72.0% higher than that of blank MIL125.
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Received: 19 September 2022
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Fund: National Natural Science Foundation of China(51502021);National Training Programs of Innovation and Entrepreneurship for Undergraduates(X202210710585) |
Corresponding Authors:
NIU Yanhui, Tel: 18913730031, E-mail: niuyh@chd.edu.cn
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