Nitrogen-doped molybdenum disulfide/C/carbon nanotube composite material
A technology for acidifying carbon nanotubes and molybdenum disulfide, which is applied in the direction of carbon nanotubes, nanocarbons, secondary batteries, etc., can solve the problems of low nitrogen doping content, loss of nitrogen doping precursors, and difficulty in obtaining raw materials. Large surface area, simplified production process, good stability
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preparation example Construction
[0040] Preparation of acidified carbon nanotubes: put 1g of carbon nanotubes and 200mL of concentrated sulfuric acid into a three-necked flask, ultrasonically disperse evenly, slowly add 60mL of 70% concentrated nitric acid dropwise, reflux and stir at 60°C for 1h, cool naturally to room temperature, add Dilute with a large amount of deionized water, let it stand for stratification, remove the supernatant, and dialyze the black precipitate at the bottom with deionized water to replace the small molecules in it, so that the surface can be balanced, and a long-term stable and uniform dispersion of carbon nanotubes can be obtained. liquid. The carbon nanotube aqueous dispersion is freeze-dried to obtain acidified carbon nanotube powder, which is placed in a desiccator for subsequent use. Its SEM picture is as follows figure 1 As shown, the structure of one-dimensional carbon nanotubes can be clearly seen, and the walls of carbon nanotubes after acidification treatment are relati...
Embodiment 1
[0043] (1) Weigh 1.0 g of acidified carbon nanotubes and disperse them in 20 mL of 37% formaldehyde aqueous solution, place them in an ultrasonic instrument and disperse evenly, and record them as dispersion liquid A.
[0044] (2) Take 0.5g ammonium paramolybdate and 20mL concentrated ammonia water (NH 3 ·H 2 O) Mix, heat up, add 3.0g ammonium sulfide ((NH 4 ) 2 S), reacted for 0.5 h under the state of magnetic stirring, and then respectively added 0.1 g of tetramethylammonium bromide and 0.6 g of melamine to the solution, and ultrasonically mixed them uniformly to obtain dispersion B.
[0045] (3) Mix Dispersion A and Dispersion B, raise the temperature of the water bath to 60°C and stir for 10 minutes. Then triethanolamine was added to the reaction solution to adjust the pH value of the reaction solution system to 8.0, and the mixture was uniformly mixed by ultrasonic, then the reaction solution was poured into a high-pressure reactor, and the temperature was raised to 12...
Embodiment 2
[0048] (1) Weigh 1.0 g of acidified carbon nanotubes and disperse them in 20 mL of 37% formaldehyde aqueous solution, place them in an ultrasonic instrument and disperse evenly, and record them as dispersion liquid A.
[0049] (2) Take 0.5g ammonium paramolybdate and 20mL concentrated ammonia water (NH 3 ·H 2 O) Mix, heat up, add 9.0g ammonium sulfide ((NH 4 ) 2 S), reacting for 1 h under magnetic stirring, then adding 2.0 g of tetramethylammonium bromide and 2.0 g of melamine to the solution, and ultrasonically mixing to obtain a dispersion B.
[0050] (3) Mix Dispersion A and Dispersion B, raise the temperature of the water bath to 60°C and stir for 10 minutes. Then triethanolamine was added to the reaction solution to adjust the pH value of the reaction solution system to 8.0, and the mixture was uniformly mixed by ultrasonic, then the reaction solution was poured into a high-pressure reactor, and the temperature was raised to 120° C. for 12 hours to react. Filtration a...
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