Removal Of Phenolic Contaminants From Water By Porous Carbon And Its Composite Materials Derived From Trimesic Acid-based MOF

Phenol pollutants are a group of common water pollutants.They will also pollute the use and reuse of drinking water at low concentration,which will cause peculiar smell of drinking water and have a negative impact on different organisms.Therefore,people are eager to find an efficient way to remove phenol pollutants from wastewater.The porous carbon and its composites derived from metal organic framework?MOFs?have the characteristics of simple preparation,high porosity,adjustable structure and components,which are conducive to the application of porous carbon and its composites from MOFs in the treatment of phenolic pollutants.In this paper,the cheap organic ligands of trimesic acid were used to prepare trimesic acid-based MOF precusors by direct precipitation.Several porous carbons and their composites derived from trimesic acid-based MOFs were obtained after carbonization at high temperature in inert atmosphere.Their adsorption and catalytic properties of phenolic compounds were studied.The main research contents and results are as follows:1.The precursor of[Cu₃?BTC?₂]was obtained by a simple direct precipitation method at room temperature.Copper/carbon nanorods were synthesized by the direct pyrolysis of the[Cu₃?BTC?₂]precursor in an inert atmosphere.The copper/carbon nanorods showed excellent catalytic ability to the reduction of p-nitrophenol,o-nitrophenol and p-nitroaniline,which was higher than many similar catalysts.Compared with the traditional catalyst,the copper/carbon nanorod catalyst is not only cheap and easy to obtain,but also has excellent catalytic performance.Therefore,the copper/carbon nanorod catalyst has great potentials in the industrial application of reducing 4-NP,2-NP and 4-NA.2.At room temperature,porous carbon nanorods were obtained by calcining Zn MOF that was firstly prepared by precipitation method.The porous carbon materials were characterized by XRD,SEM,TEM and Raman.The porous carbon materials were used as adsorbents for bisphenol A,tyrosol and 2-nitroresorcinol in aqueous solution.The results show that the porous carbon material has excellent adsorption capacity for bisphenol A,2-nitroresorcinol and tyrosol,with the maximum adsorption capacity of 1120 mg/g,577 mg/g and 274 mg/g,respectively.It is much higher than most adsorbents previously reported.3.After calcining Co/Zn MOF precursor,Co/C nanorods were obtained,which were also characterized by SEM,TEM,XRD and Raman.The product Co/C nanorods not only have good magnetic properties?30.65 emu/g?,but also have high specific surface area and pore volume?573 m²/g and 0.527 mm³/g?.The Co/C nanorod material was used to adsorb bisphenol A in water.The results show that the Co/C nanorod material exhibits excellent ability to adsorb bisphenol A,and its maximum adsorption capacity is about 320 mg/g,which is higher than the results reported in most previous literatures.