Nickel-carbon nanotube composite material and preparation method thereof

[0063] (2) Preparation method of nickel-carbon nanotube composite material

[0064] The invention provides a method for preparing a nickel-carbon nanotube composite material, which is characterized in that a mixed gas of hydrogen and an inert gas is used as a carrier gas, flower-shaped nickel-aluminum hydrotalcite is used as a catalyst precursor, and heavy oil is used as a carbon source , preparing the composite material by vapor deposition method.

[0065] According to the present invention, the preparation method of the composite material further comprises:

[0066] (1) The flower-shaped nickel-aluminum hydrotalcite and the heavy oil are respectively placed in the high-temperature zone and the low-temperature zone of the vapor deposition furnace; (2) the carrier gas is blown from the low-temperature zone where the heavy oil is placed to the high-temperature zone where the flower-shaped nickel-aluminum hydrotalcite is placed. Perform vapor deposition in the high temperature zon

[0082] (1) Preparation of flower-shaped nickel-aluminum hydrotalcite

[0083] Take Ni(NO 3 ) 2 ·6H 2 O (0.17448g), Al (NO 3 ) 3 9H 2 O (0.075026g), hexamethylenetetramine (0.14019g) and NH 4 F (0.029632g) was added to a polytetrafluoroethylene reactor, and 40mL of deionized water was added, placed in an oven, and subjected to a hydrothermal reaction at 100°C for 12 hours. After the reaction, the solution taken out was centrifuged in a centrifuge at 9000 rpm, washed, Finally, take the precipitate in the centrifuge tube, dry it in an oven at 50°C, and grind it to obtain the product.

[0084] figure 1 It can be seen that the product obtained in (1) is flower-like dispersed globules, the thickness of each nanosheet is about 10nm, and there is non-stacking growth between sheets. figure 2 Visible, the product obtained in (1) has the standard diffraction peak of hydrotalcite, and does not have impurity to exist. image 3 It can be seen that the product obtained in (1) contains

[0097] (1) Preparation of flower-shaped nickel-aluminum hydrotalcite

[0098] Take Ni(NO 3 ) 2 ·6H 2 O(0.23264g), Al(NO 3 ) 3 9H 2 O (0.12004g), hexamethylenetetramine (0.194736g) and NH 4 F (0.04148g) was added to a polytetrafluoroethylene reactor, and 37mL of deionized water was added, placed in an oven, and subjected to a hydrothermal reaction at 105°C for 10 hours. After the reaction, the solution taken out was centrifuged in a centrifuge at 8000 rpm, and washed. Finally, take the precipitate in the centrifuge tube, dry it in an oven at 60°C, and grind it to obtain the product.

[0099] (2) Preparation of nickel-carbon nanotube composites

[0100] With hydrogen-argon mixed gas as carrier gas, wherein the volume ratio of hydrogen and argon is 1:9, with the flower-shaped hydrotalcite obtained in (1) as catalyst precursor, heavy oil as carbon source, nickel-aluminum hydrotalcite (30mg ) and heavy oil (Kuwait vacuum residue 0.5g, properties see Table 1) are loaded into a