Method for preparing graded porous carbon material capacitance type desalination electrode material
A technology of graded porous and electrode materials, applied in chemical instruments and methods, water/sewage treatment, water/sludge/sewage treatment, etc.
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Embodiment 1
[0019] Dissolve 2-methylimidazole in deionized aqueous solution to prepare a solution with a concentration of 2 wt%, and adjust the pH value of the solution to 9, and mix well to obtain solution A; zinc nitrate hexahydrate and surfactant by mass Dissolve in deionized water at a ratio of 1:1 to prepare a solution with a zinc nitrate concentration of 1 wt%, mix well to obtain solution B; at a stirring rate of 350rpm / min, add solution B dropwise to solution A After stirring for 12 h, the porous metal-organic framework ZIF-8 was obtained by centrifugation, washing with deionized water for 2–3 times, and drying at 80 °C.
[0020] The obtained porous metal-organic framework ZIF-8 was placed in a tube furnace, under the protection of nitrogen gas with a gas flow rate of 90 mL / min, the heating rate was controlled at 2 °C / min, the temperature was raised to 900 °C, and the temperature was kept at 900 °C for 3 h. After cooling to room temperature, add 2M hydrochloric acid solution and st...
Embodiment 2
[0023] Dissolve 2-methylimidazole in deionized aqueous solution to prepare a solution with a concentration of 3 wt%, and adjust the pH value of the solution to 10, and mix well to obtain solution A; zinc nitrate hexahydrate and surfactant by mass Dissolve in deionized water at a ratio of 1:2 to prepare a solution with a zinc nitrate concentration of 1.5 wt%, mix well to obtain solution B; at a stirring rate of 400rpm / min, add solution B dropwise to solution A , after stirring for 16 h, the porous metal-organic framework ZIF-8 was obtained by centrifugation, washing with deionized water for 2–3 times, and then drying at 80 °C.
[0024] The obtained porous metal organic framework ZIF-8 was placed in a tube furnace, under the protection of nitrogen gas with a gas flow rate of 100 mL / min, the heating rate was controlled at 3 °C / min, the temperature was raised to 800 °C, and the temperature was kept at 800 °C for 4 h. After cooling to room temperature, add 2M hydrochloric acid solu...
Embodiment 3
[0027] Dissolve 2-methylimidazole in deionized aqueous solution to prepare a solution with a concentration of 3 wt%, and adjust the pH value of the solution to 11, and mix well to obtain solution A; zinc nitrate hexahydrate and surfactant by mass Dissolve in deionized water at a ratio of 1:3 to prepare a solution with a zinc nitrate concentration of 2 wt%, mix well to obtain solution B; at a stirring rate of 450rpm / min, add solution B dropwise to solution A , after stirring and reacting for 20 h, the porous metal-organic framework ZIF-8 was obtained by centrifugation, washing with deionized water for 2–3 times, and then drying at 80 °C.
[0028] The obtained porous metal organic framework ZIF-8 was placed in a tube furnace, under the protection of nitrogen gas with a gas flow rate of 130 mL / min, the heating rate was controlled at 4 °C / min, the temperature was raised to 700 °C, and the temperature was kept at 700 °C for 5 h. After cooling to room temperature, add 2M hydrochlori...
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