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The left figure shows that the carbon gel material has a very light density and can be placed on dandelion; the right figure shows the charge and discharge properties of the magnetic carbon aerosol obtained after calcination. From this figure it can be calculated that at a current density of 1 A/g, the capacity is 333.1 F/g.
Under the support of the National Natural Science Foundation of China, the "973" Major Research Project and the Chinese Academy of Sciences, Dr. Wang Xiangke, Ph.D., a professor of plasma physics at the Institute of Plasma Physics, Chinese Academy of Sciences, led the Ph.D. student Wu Xilin and others with the University of Science and Technology of China. Prof. Xu Anwu collaborated to prepare carbon gels with more mechanical and electrical properties using hydrothermal methods. Relevant research results were published in the American Chemical Society's nano-field journal ACS NANO (2013, 7, 3589-3597).
The researchers used hydrothermal methods to directly convert the biomass raw watermelon into carbon hydrogels and aerogels with relatively mechanical properties. The three-dimensional hydrogels and aerogels of this carbon have strong compression properties and good The hydrophilicity. From the microstructure analysis, this three-dimensional carbon material is composed of hydrophilic nano-carbon fibers and nano-spheres with a network of cross-linked porous structure. This cross-linked three-dimensional structure allows a lot of space inside, so that like a sponge, it can absorb large amounts of moisture and adsorb other ions or molecules. Adsorption of iron ions on the hydrogel, followed by calcination, forms an aerogel with magnetic carbon, which has good electrical properties and has potential applications in supercapacitors. This magnetic carbon aerosol has an electric capacity of 333.1 F/g at a current density of 1 A/g. Due to its good mechanical properties, biocompatibility, and low cost and easy preparation, the carbon gel material has broad application prospects in the fields of adsorbents, catalyst carriers, sensors, biopharmaceuticals, and treatment of pollutants.
The above research results have been highly concerned by research colleagues at home and abroad. Chemical and Engineering News of the American Chemical Society praised the work in this report as this composite aerogel could be a promising material for storing energy.
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