A kind of lignin-based carbon nanotube and its preparation method and application
A carbon nanotube and lignin-based technology, which is applied in the field of template-catalyzed pyrolysis to prepare lignin-based carbon nanotubes, can solve the problem of high energy consumption in the process (some need microwave treatment, poor product yield and quality, and poor product quality) Poor and other problems, to achieve the effect of controllable hierarchical pore structure, rich pore structure and cost economy
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Embodiment 1
[0084] (1) Weigh 2.0g commercial SBA-15 and 2.0g Ni(NO 3 ) 2 ·6H 2 O In a three-neck flask, add 30 mL of distilled water to prepare a water-dispersed mixed solution, stir it in a water bath at 60°C for 10 h, cool it down, let it stand for 12 h, and place the mixture in a vacuum freeze-drying oven to dry thoroughly. Then, take 3.0 g of the mixture and place it in a porcelain boat at a nitrogen gas flow rate of 75 mL / min and a heating rate of 5 °C / min, raise it to 600 °C and keep it warm for 1 h. After natural cooling, the nickel oxide / SBA-15 loaded type catalyst.
[0085] (2) Then, weigh 2.0g of sodium lignosulfonate and 0.6g of the above catalyst into a three-necked flask, add 25mL of distilled water, stir at 70°C for 8h, and quickly place the mixture in a vacuum freeze-drying oven to dry thoroughly after cooling , to obtain the carbonized precursor, and dry it for future use.
[0086] (3) Weigh 2.0 g of the precursor and place it in a horizontal tubular reactor under the ...
Embodiment 2
[0089](1) Weigh 3.0g commercialized SBA-15 and 1.0g Ni(NO 3 ) 2 ·6H 2 O In a three-neck flask, add 30 mL of distilled water to prepare a water-dispersed mixed solution, stir it in a water bath at 60°C for 8 hours, cool it down, let it stand for 24 hours, and place the mixture in a vacuum freeze-drying oven to dry thoroughly. Then, take 3.0 g of the mixture and place it in a porcelain boat at a nitrogen gas flow rate of 50 mL / min and a heating rate of 5 °C / min, raise it to 600 °C and keep it warm for 2 hours. After natural cooling, the nickel oxide / SBA-15 loaded type catalyst.
[0090] (2) Then, weigh 1.6g of sodium lignosulfonate and 0.5g of the above-mentioned catalyst into a three-necked flask, add 20mL of distilled water, stir at 70°C for 6h, and quickly place the mixture in a vacuum freeze-drying oven to dry thoroughly after cooling , to obtain the carbonized precursor, and dry it for future use.
[0091] (3) Weigh 2.0 g of the precursor and place it in a horizontal tu...
Embodiment 3
[0093] (1) Weigh 2.0g commercial SBA-15 and 2.0g Ni(NO 3 ) 2 ·6H 2 O In a three-neck flask, add 30 mL of distilled water to prepare a water-dispersed mixed solution, stir it in a water bath at 60°C for 10 h, cool it down, let it stand for 12 h, and place the mixture in a vacuum freeze-drying oven to dry thoroughly. Then, take 3.0 g of the mixture and place it in a porcelain boat at a nitrogen gas flow rate of 100 mL / min and a heating rate of 5 °C / min, raise it to 700 °C and keep it warm for 1 h. After natural cooling, the nickel oxide / SBA-15 loaded type catalyst.
[0094] (2) Then, weigh 3.0g of sodium lignosulfonate and 1.0g of the above catalyst into a three-necked flask, add 30mL of distilled water, stir at 70°C for 8h, and quickly place the mixture in a vacuum freeze-drying oven to dry thoroughly after cooling , to obtain the carbonized precursor, and dry it for future use.
[0095] (3) Weigh 3.0 g of the precursor and place it in a horizontal tubular reactor under the...
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