Synthesis Of New Nanoporous Materials And Their Separation Performance For Organic Dyes From Water

In recent years,advanced nanoporous materials have made great progress in many areas,such as in chemical industry and material fields,etc,especially,MOFs and COFs have attracted much attention,which have made great progress in catalysis,gas separation,membrane separation,optical,etc due to the advantages such as its variety,functionality,large porosity,small crystal density,large specific surface area,thermal stability and tunable pore size,but the study is less in the liquid phase adsorption field.To reduce the organic dye concentration in industrial waste water to a certain range is important to the sustainable development of human beings.This article from the perspective of adsorption,studies the applications of MOF/COF in the dye removal separation,and the main works are as follows:1.Hierarchical-Pore UiO-66(Zr)were synthesized through controlling the amount of template agent,and it was applied to the removal of Rhodamine B.The results show that hierarchical-Pore UiO-66(Zr)has obvious advantages in adsorbing Rhodamine B compared with UiO-66(Zr).Meanwhile,we found that as pore diameter of hierarchical-Pore UiO-66(Zr)increasing,the adsorption capacity and adsorption rate of Rhodamine B increased,which shows that we can improve the adsorption performance of MOF to removal dye by controlling the pore size of MOF.2.Zr-SBA-15@)MIL-68(Al)loading different mass fraction of Zr-SBA-15 were synthesized through controlling the amount of Zr-SBA-15,and they were applied to the removal of MB.After screening,we found that 1.5%Zr-SBA-15@)MIL-68(Al)has strong adsorption ability for methylene blue with maximum adsorption capacity being 702.4 ± 10 mg·g-1,much higher than those of Zr-SBA-15 or MIL-68(Al),showing that the composite can improve the adsorption ability of the parent materials.3.CTF was prepared using high temperature calcination method,and it was found to have a high specific surface area and large pore size after characterization.And then we apply it for adsorption of Safranine T.The results showed that the CTF has a very good adsorption capacity for Safranine T,and the maximum adsorption capacity can reach 7156 ± 100 mg.g-1,largher than the maximum adsorption capacity of the existing materials reported.Also,CTF has a good adsorption capacity after regeneration.Put forward a kind of strategy of screening adsorbent based on the interactions.