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Effect of Pore Size on the Carbon Dioxide Adsorption Behavior of Porous Liquids Based on Hollow Silica
Author(s) -
Shi Ting,
Zheng Yaping,
Wang Tianyu,
Li Peipei,
Wang Yudeng,
Yao Dongdong
Publication year - 2018
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.201700842
Subject(s) - porosity , adsorption , chemical engineering , materials science , porous medium , reagent , organic chemistry , chemistry , composite material , engineering
Porous liquids are an expanding class of material that has huge potential in gas separation and gas adsorption. Pore size has a dramatic influence on the gas adsorption of porous liquids. In this article, we chose hollow silica nanoparticles as cores, 3‐(trihydroxysilyl)‐1‐propanesulfonic acid (SIT) as corona, and inexpensive industrial reagent polyether amine (M2070) as canopy to obtain a new type of porous liquids. Hollow silica nanospheres with different pore sizes were chosen to investigate the influence of porosity size on CO 2 adsorption capacity of porous liquids. Their chemical structure, morphology, thermal behavior and possible adsorption mechanism are discussed in detail. It was proved that with similar grafting density, porous liquid that has bigger pore size possesses a better CO 2 adsorption capacity (2.182 mmol g −1 under 2.5 MPa at 298 K). More than that, this article demonstrates a more facile and low‐cost method to obtain porous liquids with good CO 2 adsorption capacity, recyclability, and huge variability.