Multi-doped graphene composite nano material and preparation method and application thereof
A technology of graphene composite and nanomaterials, which is applied in the direction of nanotechnology, nanotechnology, chemical instruments and methods, etc., can solve the problems of easy migration and volatilization, weak force of graphene, and poor photocatalytic performance, etc. The effects of heterostability, good photocatalytic performance and excellent absorption performance
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Embodiment 1
[0030] A kind of preparation method of multi-doped graphene composite nano material, concrete steps are as follows:
[0031] (1) First add graphene oxide, urea and pyrophosphoric acid into absolute ethanol, and disperse it by ultrasonic wave for 20 minutes, then add the dispersion liquid of silicon, and continue ultrasonic dispersing for 20 minutes to obtain a mixed dispersion liquid;
[0032] (2) Heat the dispersion obtained in step (1) to 80°C in a water bath with stirring, and continue stirring and heating until dry to obtain a mixed powder;
[0033] (3) Under an argon atmosphere, the mixed powder obtained in step (2) is subjected to a solid-phase reaction in a tube furnace to generate pre-doped graphene oxide for later use;
[0034] (4) Mix the hydrazine hydrate dispersion of selenium and the saturated aqueous solution of sodium molybdate to make a mixed solution, then add the pre-doped graphene oxide obtained in step (3) into the mixed solution, react at 300°C for 10 hour...
Embodiment 2
[0041] A kind of preparation method of multi-doped graphene composite nano material, concrete steps are as follows:
[0042] (1) First add graphene oxide, urea, and pyrophosphoric acid into absolute ethanol, ultrasonically disperse for 30 minutes, then add silicon dispersion, and continue ultrasonically dispersing for 30 minutes to obtain a mixed dispersion;
[0043] (2) Heat the dispersion obtained in step (1) to 85°C in a water bath with stirring, and continue stirring and heating until dry to obtain a mixed powder;
[0044] (3) Under a helium atmosphere, the mixed powder obtained in step (2) is subjected to a solid-state reaction in a tube furnace to generate pre-doped graphene oxide for later use;
[0045] (4) Mix the hydrazine hydrate dispersion of selenium and the saturated aqueous solution of sodium molybdate to make a mixed solution, then add the pre-doped graphene oxide obtained in step (3) into the mixed solution, react at 400°C for 12 hours, and post-treat Obtain t...
Embodiment 3
[0052] A kind of preparation method of multi-doped graphene composite nano material, concrete steps are as follows:
[0053] (1) First add graphene oxide, urea, and pyrophosphoric acid into absolute ethanol, ultrasonically disperse for 20 minutes, then add silicon dispersion, and continue ultrasonically dispersing for 30 minutes to obtain a mixed dispersion;
[0054] (2) Heat the dispersion obtained in step (1) to 80°C in a water bath with stirring, and continue stirring and heating until dry to obtain a mixed powder;
[0055] (3) Under an argon atmosphere, the mixed powder obtained in step (2) is subjected to a solid-phase reaction in a tube furnace to generate pre-doped graphene oxide for later use;
[0056] (4) Mix the hydrazine hydrate dispersion of selenium and the saturated aqueous solution of sodium molybdate to make a mixed solution, then add the pre-doped graphene oxide obtained in step (3) into the mixed solution, react at 400°C for 10 hours, and post-treat Obtain t...
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