Preparation of black carbon airgel Tongji surplus improved photothermal conversion efficiency
Sunlight – is one of the thermal conversion of solar energy (3.660, -0.02, -0.54%) The most simple and effective way. Using solar desalination actually using solar steam generation system, first light energy into heat, and then utilizing thermal energy to heat water, salts, ions and heavy metal ions are not lost during evaporation of the water with the water vapor, thereby to achieve water desalination process. Tongji University School of Physics and Engineering Task Force nanoporous material of the carbon airgel by continuous research and found to have special properties, such as its small size and the disordered structure effects caused conductors angle-independent, wide-band strong light absorption (ACS Nano, 2016, 10, 9123-9128), double negative characteristics caused by the split ring resonator equivalent result (Carbon, 2018, 129, 598-606), and small-sized conductor strong effect thermally coupling the electronic effect of enhancing the photocatalytic (MRS. Comm. 2018, 8, 521-526) and the like.
Recently, the research group prepared by using combined pre-freezing carbonization process, the set macropores, mesopores and micropores in one of the super-structure carbon black and aerogels. Vertical material macroporous structure facilitates the transport of water vapor; mesoporous structure conducive to the insulation material; and a microporous structure can be small-sized conductor configured to generate strong hot electron effect, and ultimately improve the photothermal conversion efficiency. In addition, you can create a new pore structure in the original framework material activated by physical methods. Ultimately, the material is achieved under 1 sun illumination intensity photothermal conversion efficiency of 87.51% and 1.37kg / m-2 h water evaporation rate /. The material by means of evaporation of water can be made desalination, waste water treatment and softening hard water, and treated water can reach the Ministry of Health and WHO standards for drinking water. The work with \”Enhanced Photothermal Conversion by Hot-Electron Effect in Ultrablack Carbon Aerogel for Solar Steam Generation\” in the titlePublished in the internationally renowned journal \”ACS Applied Materials & Interfaces\” (ACS Appl. Mater. Interfaces 2019, 11, 42057-42065).