氮掺杂碳材料的制备及催化降解苯酚废水实验研究

ZIF-67 derived carbon material catalyst is prepared by pyrolysis method using ZIF-67 as the precursor.The catalyst is characterized by BET, XRD, SEM and other analytical methods.The results show that the catalysts prepared at 700℃, 800℃ and 900℃ all form elemental Co, and forming a structure of nitrogen-doped porous carbon coated with cobalt metal.Through comparative experiments, it is found that the catalyst prepared at 800℃ has higher catalytic activity than that prepared at 700℃ and 900℃.An experiment is designed for catalytic degradation of simulated phenol wastewater, and the results show that the removal rates of phenol and TOC are 90.6% and 82.3%, respectively when the initial mass concentration of phenol is 50 mg•L^-1, the concentration of persulfate is 1.2 mmol•L^-1, the mass concentration of catalyst is 0.05 g•L^-1, pH=9 and the reaction lasts for 120 min.After the catalyst has been used for 5 times, the removal rates of phenol and TOC are 76.4% and 70.3%, respectively.