Black phosphorene aerogel and preparation method thereof
A technology of airgel and black phosphorene, applied in chemical instruments and methods, phosphorus, phosphorus compounds, etc., can solve the problems of composite airgel performance impact, oxidation or destruction of black phosphorus nanosheets, complex preparation process, etc. Achieve excellent photothermal characteristics, novel and simple technical solutions, and excellent adsorption performance
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Embodiment 1
[0036]Take 2mg of black phosphorus nanosheets with an average size of 3μm and an average thickness of 2nm and ultrasonically disperse them in 5mL of cyclohexane. ℃ for 2 hours, followed by freeze-drying, the freeze-drying temperature is -80°C, the vacuum degree is 0.01mbar, and the freeze-drying time is 12 hours, and the black phosphorene airgel can be obtained.
[0037] The photothermal conversion efficiency of the prepared airgel is 8%, and the density is 1.0 mg / cm 3 , with a porosity of 85% and a specific surface area of 500m 2 / g.
[0038] in, figure 1 It is a physical digital photo of the black phosphorene airgel prepared in this example. It can be seen that the black phosphorene airgel has a fluffy structure and a large volume, and has a three-dimensional network structure. figure 2 It is a microscope photo of the black phosphorene airgel prepared in this example. It can be seen that the black phosphorene airgel has a fluffy structure, a large number of pores, and ...
Embodiment 2
[0042] Take 0.5 mg of black phosphorus nanosheets with an average size of 5 μm and an average thickness of 1 nm and ultrasonically disperse them in 6 mL of cyclohexane, wherein the ultrasonic time is 12 min, and the ultrasonic power is 100 W, then stand at room temperature for 10 min; then place at 0 ℃ for 3 hours, followed by freeze-drying. The freeze-drying temperature is -20°C, the vacuum degree is 0.1 mbar, and the freeze-drying time is 24 hours to obtain the black phosphorus aerogel.
[0043] The photothermal conversion efficiency of the prepared black phosphorene airgel is 20%, and the density is 0.5 mg / cm 3 , the porosity is 91%, and the specific surface area is 1000m 2 / g.
Embodiment 3
[0045] Take 5 mg of black phosphorus nanosheets with an average size of 0.5 μm and an average thickness of 2 nm and ultrasonically disperse them in 20 mL of cyclohexane, where the ultrasonic time is 5 min and the ultrasonic power is 1000 W, then stand at room temperature for 60 min; then place in- Freezing at 60°C for 5 hours, followed by freeze-drying, the freeze-drying temperature is -50°C, the vacuum degree is 1mbar, and the freeze-drying time is 3 hours to obtain the black phosphorus aerogel.
[0046] The prepared black phosphorene airgel has a photothermal conversion efficiency of 10% and a density of 5.1 mg / cm 3 , with a porosity of 79% and a specific surface area of 600m 2 / g.
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