以聚苯胺制备富含氮多孔碳催化氧化降解酸性红73

Degradation of acid red 73 by catalytic oxidation using nitrogen-rich porous carbon based on polyaniline preparation

以合成的聚苯胺为前驱体,分别采用NaCl、KCl、MgCl2、CaCl2为造孔剂,在950℃进行高温炭化得到富含氮多孔碳材料,并将其用于催化过硫酸盐氧化处理酸性红73废水。实验结果表明,富含氮多孔碳材料是一种以大孔介孔为主的多孔碳材料,随着造孔剂阳离子半径的增大,体现出更好的造孔性能和催化氧化活性。因此,以CaCl2为造孔剂时,比表面积最大可达124.9 m^2/g,在25℃,该催化剂投加量为0.4 g/L,过硫酸钠(PS)投加量为0.5 g/L时,酸性红73的去除率最高可达98.4%。

Based on polyaniline as precursor and NaCl,KCl,MgCl2 and CaCl2 as pore-forming agents respectively,nitrogen-rich porous carbons were prepared by high temperature carbonization at 950℃,and then it was used to ca-talyze persulfate oxidation to treat acid red 73 wastewater.Results suggested that nitrogen-rich porous carbons were a kind of porous carbon mainly composed of macropores and mesoporous.Additionally,nitrogen-rich porous carbon showed better pore-forming performance and catalytic oxidation activity with the increase of cation radius of pore-fo-rming agent.Therefore,the nitrogen-rich porous carbon based on CaCl2 as pore-forming agent had maximum specific surface area with 124.9 m^2/g and then showed highest acid red 73 removal,which can reach 98.4%under 25℃,0.4 g/L of catalyst dosage and 0.5 g/L of PS dosage.