Tungsten diselenide has the chemical formula WSe2, and its thermal conductivity is about one-100,000th of that of diamond with the best thermal conductivity. It can be said that it is the lowest thermal conductivity material among all materials discovered by scientists. So, how should tungsten diselenide nanoflowers be prepared?
Preparation of tungsten diselenide nanoflowers, the specific steps are as follows:
(1) Dissolve selenite (H2SeO3) in an organic solvent and mix uniformly, add sodium tungstate (Na2WO4) with crystal water while stirring. ? 2H2O) to prepare the mixed solution.
(2) Transfer the obtained mixed solution to the reactor, and react for 12 to 48 hours under the conditions of the temperature range of 180℃～240℃.
(3) Let the temperature of the reactor cool down naturally. After reaching room temperature, the black product was collected by suction filtration, and the product was washed with deionized water and ethanol, and vacuum dried to obtain tungsten diselenide nanoflowers. Compared with the traditional production technology, the preparation method of the tungsten diselenide nanoflower has a simpler process, lower production cost, easy-to-obtain raw materials, and mild reaction conditions.
Tungsten diselenide, like molybdenum disulfide and tungsten disulfide, is also a two-dimensional material. Two-dimensional materials refer to materials in which electrons can only move freely in two dimensions, non-nanoscale. It has unique electrical, optical and mechanical properties, such as good conductivity, flexibility and strength, and is therefore expected to be used in lasers, photovoltaic cells, sensors, and medical electronics.
When a piece of two-dimensional material is placed on another piece of two-dimensional material and slightly rotated, the torsion fundamentally changes the properties of the double-layer material and causes peculiar physical behaviors, such as high-temperature superconductivity (used in electrical engineering), nonlinear optics (for laser and data transmission), super-lubricity of structure.
