仿酶型Fe_3O_4/焦炭非均相降解P-NP研究

采用原位氧化沉淀法制备出仿酶型Fe_3O_4/焦炭,并将其作为非均相类Fenton催化剂用于对硝基苯酚(P-NP)废水的降解;采用扫描电子显微镜(SEM)、X射线衍射(XRD)和红外光谱(FTIR)对样品进行表征。表征结果表明,Fe_3O_4牢固地负载在焦炭上,并有利于Fe_3O_4的分散及粒径的减小。实验结果表明,催化剂降解P-NP的最佳条件为:催化剂投加量1.2 g/L,H2O2]=30 mmol/L,p H=3.0,温度30℃,P-NP的去除率达到99%。Fe_3O_4/焦炭结构稳定,可再生使用。

The Heterogeneous Degradation of P-NP by Biomimetic Fe3 O4/Coke

The biomimetic Fe3 O4/coke composite catalyst is successfully prepared by in -situ oxidation -precipitation method and used as a heterogeneous Fenton -like catalyst in degradation of p -nitrophenol .The catalyst is characterized by SEM ,XRD and FTIR .The characterization results indicate that the Fe3 O4 nanoparticles exist on the surface of coke steadi-ly ,with better dispersing and less partical size .The best degradation conditions of Fe3O4/coke on P-NP are as follows :catalysts ]=1 .2 g/L , H2 O2 ]=30 mmol/L ,pH=3 .0 and T=30 ℃ and in these conditions the removal rate of P -NP can reach 99% .Fe3O4/coke is a catalyst showing good stability and reusability .