Enhanced CO2 Adsorption Capacity and Hydrothermal Stability of HKUST-1 via Introduction of Siliceous Mesocellular Foams (MCFs)

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• 作者：Chunling Xin ; Xi Jiao ; Yanlong Yin ; Haijuan Zhan ; Hongguang Li ; Lei Li ; Ning Zhao ; Fukui Xiao ; Wei Wei
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2016
• 出版时间：July 27, 2016
• 年：2016
• 卷：55
• 期：29
• 页码：7950-7957
• 全文大小：526K
• 年卷期：0
• ISSN：1520-5045

文摘

New hierarchical composites containing micropores and mesopores were synthesized by assembling HKUST-1 (Cu₃(BTC)₂) on siliceous mesocellular foams (MCFs). The structure, morphology, and textural properties of as-prepared composites were characterized by X-ray diffraction, scanning electron microscopy, thermogravimetric analysis, and N₂ sorption isotherms, respectively. The results suggest that the coexistence of mesoporous silicas promotes the formation of nanosized MOFs, and the mesostructures of silicas are not destroyed by MOFs. Moreover, the micropore/mesopore volume ratio can be controlled by varying the amounts of MOFs. The CO₂ adsorption capacities were calculated by breakthrough curves, which were tested in a fixed bed. The CO₂ adsorption capacity of the composites reaches 1.40 mmol/g, which is higher than that of bulk HKUST-1. The structure and CO₂ adsorption capacity of the composites after the hydrothermal treatment also have been evaluated. The results show that composite-2 has a larger CO₂ adsorption capacity of 1.68 mmol/g after steam conditioning and that the structure of HKUST-1 in the composites remain stable.