摘要：Catalytic combustion is one of the most effective methods for the treatment of aromatic chlorinated volatile organic compounds.But the catalyst is susceptible to poisoning and its high replacement cost limits the widespread use.In this study,a cheaper catalyst,8-MnO2,was prepared as a matrix by a mild and simple hydrothermal method.The matrix was modified by doping aluminum ions (Al3+) with different loading ratio.Physicochemical properties,catalytic properties and service life of 8- MnO2 before and after doping modification were compared by XRD,SEM,TEM,BET,XPS,H2- TPR and catalytic performance experiments.The results of the catalytic efficiency of chlorobenzene under the same reaction condition are: AlMn2 > AlMn4 > AlMnl > AlMn8 > 8-MnO2.Combined with the characterization results,the modified catalysts are different among the crystal morphology,the structure of groove and redox properties.A bigger formatted surface area (539.82 m2・g-1) and pore-richer "cotton candy" nano flower ball is developed which improved redox property as well as Mn-O activity,resulted in the improved performance of catalytic degradation to chlorobenzene after using the modified catalysts.
