Preparation And Adsorption Properties Of Porous Carbon From The Supercrosslinked Porous Polymer

Due to their large specific surface area and large pore volume,porous materials have caused research upsurge in recent years and have been applied to many fields including environment and energy storage.Among them,the porous carbon material has a large specific surface area,abundant pores,and easy preparation,and is subject to eager attention,and exhibits excellent performance in gas capture,volatile iodine,and organic dye adsorption.In addition to the carbon skeleton,the porous carbon material can also introduce hetero atoms such as oxygen,nitrogen,sulfur,etc.so that it has more comprehensive and excellent properties.In this thesis,a synthetic super-crosslinked porous polymer was used as a precursor,and porous carbon doped with hetero atoms such as oxygen,nitrogen and sulfur was prepared by KOH activated carbonization.First,a naphthalene derivative?2-naphthol,2-methoxynaphthalene,2,3-hydroxynaphthalene,1,1'-binaphthol?was used as a monomer,and supercrosslinking was synthesized by Friedel-Crafts reaction.A porous polymer,which is a precursor,is prepared by a method of carbonization by KOH activation.It was found to have a specific surface area between 944 m² g^-11 and 2755 m² g^-11 with a high microporosity.Among them,C_HPN-3 can reach 739.1 wt%iodine vapor capture and iodine adsorption from iodine/cyclohexane solution can reach 254 mg g^-1;and the capacity of adsorption of malachite green from aqueous solution can reach 862.5 mg g^-1.It is a material that is superior in handling environmental pollutants.Furthermore,we selected a nitrogen-containing compound?2-aminothiazole,2-aminobenzothiazole,2-aminobenzimidazole,1,2,4-triazole?as a building unit,and prepared a super-crossing with Friedel-Crafts reaction.The porous nitrogen-containing porous polymer has a specific surface area of only 120 m² g^-11 to 401 m² g^-1.However,it has excellent capturing ability for iodine vapor,and SZ can reach 502 wt%of iodine vapor capture,which is more than reported.Porous polymer material.It also has a certain adsorption effect on dyes.Among them,BBSZ can adsorb the mixed solution of methylene blue and eosin to colorless,and can absorb the mixed dye of 140 mg g^-1,while SZ and SanZ are more likely to adsorb acid dyes;while BBMZ is more likely to adsorb alkali.Sex dyes,thus enabling selective adsorption of different dyes.Finally,we prepared a nitrogen-doped porous carbon material by KOH activated carbonization using a nitrogen-containing porous polymer as a precursor.Its specific surface area is between 1443 m² g^-11 and 2041 m² g^-1.BBMZ800 has the advantages of fast iodine absorption and maximum intake.The maximum intake can reach 631 wt%and can be released quickly from iodine/cyclohexane.The adsorption rate of adsorbed iodine in the solution is up to SanZ800,and the adsorption capacity can reach 231 mg g^-1.At the same time,the carbon material can adsorb both the basic dye?MB?and the acid dye?HE?from the aqueous solution.The adsorption capacity of BBMZ800 to MB is up to 435 mg g^-1,while the adsorption capacity of SZ800 to HE exceeds 500 mg g^-1.The nitrogen-containing doped porous carbon material has various adsorption properties and can be used as an effective adsorbent for capturing radioactive iodine and harmful dye removal in water,and has the potential to become a new material for treating environmental pollution.