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Recently, Deng Weiqiao, a researcher in the Materials Dynamics Simulation and Design Research Group of Dalian Institute of Chemical Physics, Chinese Academy of Sciences, has made new progress in the application of conjugated microporous polymers for water treatment. The results were published in SCIENTIFIC REPORTS on the topic Extraordinary Capability for Water Treatment Achieved by a Perfluorous Conjugated Microporous Polymer.
At present, more than one-third of the world’s population still lacks safe drinking water. How to remove the three main chemical pollutants of heavy metal ions, organic substances and dyes in water is the main challenge currently facing. The early development of microporous materials such as activated carbon has the disadvantages of low adsorption efficiency and poor regenerability. Emerging microporous materials such as various nanomaterials have high adsorption efficiency, but they can only adsorb one of the three major contaminants at the same time. One or two of them greatly limit their application.
The newly developed perfluorinated conjugated microporous polymer (PFCMP), as a novel microporous material, has a large specific surface area and superhydrophobic characteristics, and exhibits a wide range of organic solvents/oils, dyes, and heavy metal ions. Excellent adsorption capacity, adsorption kinetics, and regeneration capability. The dye adsorption capacity of up to 1377mg / g; lead ion adsorption capacity up to 808mg / g; arsenic ion adsorption capacity up to 303mg / g, these adsorption data far exceed any previously reported porous material. The amount of organic solvent adsorbed can reach 3000wt.%, and the adsorption rate is faster, and the toluene in the water can be removed within 40s. Most importantly, the material can adsorb three pollutants at the same time and efficiently. The theoretical calculations show that the excellent adsorption capacity of this material originates from the fluorine atoms with high electronegativity and the hydrazine bonds with coordination ability in the framework. This material can be used to develop the next generation of portable water treatment devices that are reused.
The research group has been working on the development and application of conjugated microporous polymers such as hydrogen storage (Angew. Chemie. Int. Ed. 2010, 49, 3330); applied to oil-water separation (Energy Env. Sci. 2011, 4, 2062); applied to the capture and conversion of carbon dioxide (Nature Commun. 2013, 4, 1960). This work is a further development on the basis of these preliminary work and has received strong support from the National Natural Science Foundation of China.
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