Method for preparing nitrogen-doped porous carbon by taking waste crop root systems as raw materials and application of nitrogen-doped porous carbon
A crop and porous carbon technology, which is applied in the field of nitrogen-doped porous carbon and its preparation, can solve the problems of cumbersome synthesis steps, small adsorption amount of RhB, and unobtrusive surface properties, and achieve good application prospects, large specific surface area, and low raw material cost effect
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Embodiment 1
[0030] Example 1 Hydrothermal temperature screening
[0031] (1) Add 5.0 g of waste crop root powdered corn root to 190 mL of deionized water, drop into 10 mL of concentrated hydrochloric acid and stir for 1.0 h, filter through a Buchner funnel, then add 200 mL of deionized water and heat and wash for 30 min, then wash three times until Neutral, filtered by Buchner funnel, dried at 70°C for 24.0 h to obtain clean raw materials;
[0032] (2) Take 4.5 g of the cleaned raw material and add it to 75mL of 10% dilute sulfuric acid solution, stir well to obtain solution B; put solution B in a hydrothermal reaction kettle, and raise the temperature to 160°C at a heating rate of 5°C / min. 180°C and 200°C, after constant temperature reaction for 18.0h, naturally cool to room temperature to obtain the hydrothermal product;
[0033] (3) The hydrothermal product was washed three times with deionized water and absolute ethanol in turn, filtered through a Buchner funnel, and dried at 70°C fo...
Embodiment 2
[0035] Embodiment 2 hydrothermal time screening
[0036] (1) Add 5.0 g of waste crop root powdered corn root to 190 mL of deionized water, drop into 10 mL of concentrated hydrochloric acid and stir for 1.0 h, filter through a Buchner funnel, then add 200 mL of deionized water and heat and wash for 30 min, then wash three times until Neutral, filtered by Buchner funnel, dried at 70°C for 24.0 h to obtain clean raw materials;
[0037] (2) Add 4.5 g of cleaned raw materials into 75 mL of 10 % (v / v) dilute sulfuric acid solution, stir well to obtain solution B; The temperature was raised to 180°C, and after constant temperature reaction for 16.0 h, 18.0 h and 24.0 h, it was naturally cooled to room temperature to obtain the hydrothermal product;
[0038] (3) The hydrothermal product was washed three times with deionized water and absolute ethanol in turn, filtered through a Buchner funnel, and dried at 70°C for 24.0 h to obtain an intermediate product;
[0039] It can be seen fr...
Embodiment 3
[0040] Example 3 Sulfuric acid concentration screening
[0041] (1) Add 5.0 g of waste crop root powdered corn root to 190 mL of deionized water, drop into 10 mL of concentrated hydrochloric acid and stir for 1.0 h, filter through a Buchner funnel, then add 200 mL of deionized water and heat and wash for 30 min, then wash three times until Neutral, filtered by Buchner funnel, dried at 70°C for 24.0 h to obtain clean raw materials;
[0042] (2) Take 75 mL of deionized water, 5% (v / v) dilute sulfuric acid solution, 10% (v / v) dilute sulfuric acid solution, and 15% (v / v) dilute sulfuric acid solution as solution A; take 4 parts Add 4.5 g of cleaned raw materials to 75 mL of solution A, stir well to obtain solution B; put solution B in a hydrothermal reactor, raise the temperature to 180°C at a heating rate of 5°C / min, and react at constant temperature for 18.0 h , cooled naturally to room temperature to obtain a hydrothermal product;
[0043] (3) The hydrothermal product was was...
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