A kind of expanded graphite/carbonized polydopamine composite material and its preparation method and application as benzene gas adsorbent
A carbonized polydopamine and gas adsorbent technology, applied in chemical instruments and methods, separation methods, gas treatment, etc., can solve the problems of high regeneration loss rate, poor thermal conductivity of carbonized polydopamine, etc., and achieve low cost and excellent benzene removal adsorption. performance, stable performance
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Embodiment 1
[0027]a. Oxide the scale graphite, inserted into the layer, and heat the pension of 20s at 900 ° C to form expanded graphite;
[0028]b. Mix the ammonia solution, ethanol, and deionized aqueous solution by mass ratio 3: 80: 180, water bath at 30 ° C for 30 min, produce solution A;
[0029]c. Mix the dopamine hydrochloride and deionized water to mix the solution B by mass than 1: 40;
[0030]d. Solution A, solution B, mix the mass ratio of 10: 1, stirred with expanded graphite, stirred at 40 ° C for 30 h, filtered, obtained filter cake, wash the filter cake with distilled water or ethanol, vacuum dry, to obtain expanded graphite / poly Dopamine composite material;
[0031]e. Precondensation graphite / polybatamine composites and KOH are mixed in mass than 1: 8, placed in a tubular furnace for 1 h, to obtain a carbide;
[0032]f. Add the carbide to HCl, wash away KOH, and then washed with distilled water or ethanol, dried, i.e., the expanded graphite / carbicide polyoxamine composite material.
[0033]...
Embodiment 2
[0035]The present embodiment is substantially the same as the examples, in particular, "The composite material is mixed with KOH in mass than 1: 6, and the tube furnace is placed in a tubular furnace. The specific scheme is as follows:
[0036]a. Oxide the scale graphite, inserted into the layer, and heat the pension of 20s at 900 ° C to form expanded graphite;
[0037]b. Aqueous ammonia solution with ethanol and deionized aqueous solution is mixed with a mass ratio of 3: 80: 180, a water bath at 60 ° C for 30 min, and the solution A is obtained.
[0038]c. Mix the dopamine hydrochloride and deionized water to mix the solution B by mass than 1: 40;
[0039]d. The solution A, solution B, mixed with mass ratio of 10: 1, add expanded graphite, stirred at 40 ° C for 30 h, filtered, obtained filter cake;
[0040]e. Wash the filter with distilled water or ethanol, dried in vacuo, to expand the graphite / polybatamine composite material; mix the expanded graphite / polybaline composite and KOH in mass th...
Embodiment 3
[0047]The present embodiment is substantially the same as that of the examples, in particular, "" The composite material and NaOH are mixed according to the mass ratio of 1: 4, and the tube furnace is placed 900 ° C for 1 h ", and the specific scheme is as follows."
[0048]a. Oxide the scale graphite, inserted into the layer, and heat the pension of 20s at 900 ° C to form expanded graphite;
[0049]b. Aqueous ammonia solution with ethanol and deionized aqueous solution is mixed with a mass of 3: 80: 180, and stirred at 40 ° C for 30 min to prepare a solution A;
[0050]c. Mix the dopamine hydrochloride and deionized water to mix the solution B by mass than 1: 40;
[0051]d. Solution A, solution B, mix the mass ratio of 10: 1, stirred with expanded graphite, stirred at 40 ° C for 30 h, filtered, obtained filter cake, wash the filter cake with distilled water or ethanol, vacuum dry, to obtain expanded graphite / poly Dopamine composites;
[0052]e. Precautions with NaOH and NaOH in mass ratio of 1:...
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Abstract
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