Method for modifying black phosphorus by azobenzene derivatives, and compound obtained therefrom
A technology of azobenzene derivatives and composites, which is applied in the field of preparation of functional/composite materials, can solve the problems of lack of stability, limit the research and industrial application of black phosphorus, and achieve low cost, prevent re-accumulation, and wide application prospects Effect
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[0026] The preparation steps of the present invention are as follows.
[0027] The black phosphorus and the azobenzene derivatives are mixed into the organic solvent in a mass ratio of 1.5:0.1-15, preferably 1:10. The concentration of azobenzene derivatives in the mixed solution is controlled at 0.0001-0.1mmol / L, and the solvent is one or two of N-methylpyrrolidone, dimethyl sulfoxide, N,N-dimethylformamide and water For the above mixture, the azobenzene derivative is one kind or a mixture of two or more long alkyl chain molecules with different terminal groups (amino group, mercapto group, n-hexyl group, quaternary ammonium salt) substituted by para-position.
[0028] The mixed solution is isolated from the air, and the liquid phase ultrasonic dispersion experiment is carried out at a certain temperature. The temperature during the liquid phase dispersion process is controlled at 0-20°, and the ultrasonic time is 6-8 hours.
[0029] The target product can be obtained by cent...
Embodiment 1
[0032] Put the black phosphorus nanosheets into dimethyl sulfoxide (DMSO). During the ultrasonic process in a water bath, the temperature is controlled at 0-20°, and the ultrasonic time is 8 hours. The mixed solution was centrifuged at 10000rpm for 30min; the obtained supernatant was the solution of the complex of black phosphorus nanosheets and azobenzene derivatives; the bottom precipitate was the target product after drying at 60° in vacuum.
Embodiment 2
[0034] Put black phosphorus nanosheets and azobenzene derivative molecules into dimethyl sulfoxide (DMSO) at a mass ratio of 1:10, and the azobenzene molecules are AB-O-C 4 h 8 -NMe 3 + I - , the concentration is controlled at 0.01mg / mL; the temperature of liquid-phase ultrasonic dispersion is controlled at 0-20°; the ultrasonic time is 8h; the mixed solution after ultrasonic is centrifuged at a speed of 10000rpm for 30min; the obtained supernatant is black phosphorus The solution of the complex of nanosheets and azobenzene derivatives; the bottom precipitate is the target product after drying at 60° in vacuum.
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