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Rapid in Situ Self‐Assembly of Carbon Fibers/ZIF‐8 Composite for Efficient Adsorption Enhancement of Congo Red
Author(s) -
Xiong SuQin,
Li JiaLe,
Wang Yu,
Gao YuHang,
Jin ChunXin,
Dong WeiWei,
Zhao Jinhua,
He Miao,
Li Donghao,
Shang HaiBo
Publication year - 2019
Publication title -
chemistryselect
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.437
H-Index - 34
ISSN - 2365-6549
DOI - 10.1002/slct.201901240
Subject(s) - adsorption , congo red , composite number , metal organic framework , zeolitic imidazolate framework , aqueous solution , materials science , chemical engineering , scanning electron microscope , activated carbon , specific surface area , carbon fibers , porosity , molecule , imidazolate , nitric acid , inorganic chemistry , chemistry , composite material , organic chemistry , catalysis , engineering
Although carbon fibers (CFs) are born with special physicochemical properties, the common CFs show the poor adsorption performance owing to the lack of adsorption sites and porosity with low specific surface area. As emerging functional materials, metal‐organic frameworks (MOFs) have attracted significant attention due to excellent properties, which has the ability of remedying drawbacks of other materials. In this study, zeolitic imidazolate framework‐8 (ZIF‐8) was rapidly coated on the surface of carbon fibers (CFs) (CF/ZIF‐8) via in‐situ self‐assembly approach in 10 min. The scanning electron microscope (SEM) images show ZIF‐8 film on CF is dense and homogeneous due to the low reactivity of zinc acetate and the coordination interaction between Zn 2+ and carboxyl of CF treated by nitric acid (CF‐COOH). The Brunauer‐Emmett‐Teller (BET) surface area of CF/ZIF‐8 composite is about 30 times larger than that of pristine CF. The adsorption selectivity of CFs was increased after the modification of ZIF‐8 demonstrating by adsorbing different dyes. The CF/ZIF‐8 composites were applied to remove congo red (CR) from aqueous solutions with the adsorption capacity 40 times more than that of pristine CF and CF‐COOH, because of the increasing specific surface, electrostatic interaction and π‐π interaction between ZIF‐8 and CR molecule. The MOFs/CFs composites we fabricated also have great promise applications in micro‐preconcentration and electrochemistry.