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个人信息Personal Information
教授
博士生导师
硕士生导师
主要任职：盘锦校区管委会副主任兼教学与科研工作部部长
性别：男
毕业院校：大连理工大学
学位：博士
所在单位：化工学院
学科：工业催化. 物理化学
办公地点：化工实验楼B427
联系方式：18641143913
电子邮箱：guoxw@dlut.edu.cn
Channel-wall functionalization in covalent organic frameworks for the enhancement of CO2 uptake and CO2/N-2 selectivity
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论文类型：期刊论文
发表时间：2016-01-01
发表刊物：RSC ADVANCES
收录刊物：SCIE、EI
卷号：6
期号：45
页面范围：38774-38781
ISSN号：2046-2069
摘要：A series of tailored covalent organic frameworks (COFs), i.e. [N=N](X%)-TAPH-COFs and [C=C](X%)-TAPH-COFs, were synthesized by post-fabrication of [HO](X%)-TAPH-COFs with 4-phenylazobenzoyl chloride (PhAzo) and 4-stilbenecarbonyl chloride (PhSti), respectively. Powder X-ray diffraction (PXRD), FT-IR, and solution-state H-1 NMR of the digested COFs were applied to clarify the functional groups integrated in the pore channels. Gas sorption isotherms confirmed that the [N=N](X%)-TAPH-COFs and [C=C](X%)-TAPH-COFs had moderate surface areas, narrow pore sizes, and good physicochemical stability. Compared with [C=C](X%)-TAPH-COFs, the [N=N](X%)-TAPH-COFs exhibited higher CO2 uptake capacities of up to 207 mg g(-1) (273 K and 1 bar), isosteric heats of adsorption for CO2 (30.7-43.4 kJ mol(-1)), and CO2/N-2 selectivities of up to 78 (273 K) because of the dipole interactions between the azo group and CO2 as well as the N-2-phobic behavior of the azo group. Furthermore, although the decreased pore size was advantageous for increasing CO2 adsorption, the decreased surface area of the COFs would undoubtedly decrease CO2 adsorption if too many functional groups were introduced.