磁性光催化剂TiO2/Ti3C2/Fe3O4的制备及光催化Fenton降解苯胺

Preparation of TiO2/Ti3C2/Fe3O4 Magnetic Photocatalytst and the Photocatalytic Degradation of Aniline

本文采用共沉淀法制备了磁性TiO2/Ti3C2/Fe3O4 Fenton光催化剂,并通过SEM、TEM、XRD、FT-IR和UV-vis对其微观结构及性能进行了表征,以苯胺为目标降解物,考察了TiO2/Ti3C2/Fe3O4的光降解性能。表征结果表明复合光催化剂饱和磁强度为13.88 emu/g,具有较强的顺磁性,可通过外加磁场回收利用。此外,光催化Fenton降解苯胺效率高达91.3%,通过机理分析表明这是因为光催化反应与Fenton反应间存在协同效应,有助于光生电子的转移和OH的产生,从而大幅提高了催化降解苯胺的性能。本文巧妙地将MXene材料与Fenton试剂结合构建光催化Fenton体系,这对新型二维材料MXene的深入研究具有重要意义。

The magnetic TiO2/Ti3C2/Fe3O4 Fenton photocatalysts were prepared by coprecipitation method.Then,the samples were characterized by SEM,TEM,XRD,FT-IR,UV-vis.The photocatalytic degradation ability of TiO2@Ti3C2/Fe3O4 was investigated with aniline as the target degradant.The characterization results show that the composite photocatalyst has a saturation magnetic strength of 13.88 emu/g,which has strong paramagnetism and can be recycled by external magnetic field.In addition,the efficiency of photocatalytic Fenton degradation of aniline is as high as 91.3%.The mechanism analysis shows that there is a synergistic effect between photocatalytic reaction and Fenton reaction,which contributes to the transfer of photogenerated electrons and the production of·OH,thus greatly improving the catalytic degradation of aniline.This paper skillfully combines MXene materials with Fenton reagent to construct a photo-Fenton system,which is of great significance for the in-depth study of the new two-dimensional material MXene.