The invention belongs to the technical field of
photothermal conversion materials, and discloses a preparation method and application of an inorganic-organic
hybrid polyoxotungstate photothermal material with wide spectrum absorption. The
structural formula of the photo-thermal material is Per4W10O32, the
crystal structure belongs to a triclinic
system, the
space group is P-1, and the photo-thermal material has specific unit
cell parameters. The preparation method comprises the following steps: oxidizing
perylene molecules through
constant current electrolysis in a mixed
solvent system containing
perylene molecules and a decatungstate precursor in an electrochemical oxidation manner, and assembling the oxidized
perylene molecules with decatungstate anions to form bulk crystals; the photo-thermal material has continuous strong absorption in a region from
ultraviolet light to
short wave infrared, the photo-thermal conversion efficiency is as high as 98.24%, when the photo-thermal material is applied to the fields of solar driven interface photo-thermal
evaporation and
water treatment, the
evaporation rate of a two-dimensional
system is 1.89 kg.m <-2 >. H <-1 >, the
evaporation rate of a three-dimensional hydrogel system is increased to 3.02 kg.m <-2 >. H <-1 >, salt deposition can be inhibited in long-term
seawater desalination operation, and the photo-thermal material has a good application prospect.
Fresh water quality meets drinking water standards.