Fe_(3)O_(4)纳米粉体掺杂PTCDI复合材料的制备与光催化研究

Preparation of FeO-PTCDI heterojunction material and its photocatalytic performance

制备了一种具有磁响应的有机纳米半导体复合光催化材料,并将其用于吸附及光催化降解有机物。利用SEM、TEM、FT-IR及DRS对产物的形貌结构及光吸收性能进行了表征。可见光条件下吸附降解有机染料实验结果表明,Fe_(3)O_(4)-PTCDI纳米复合材料具有较好的吸附及光催化活性;经过4 h的紫外光或6 h的吸附及可见光光催化降解,亚甲基蓝的去除效率分别为76.4%及72.2%。6次光催化重复利用实验结果表明,其有机染料的去除效率未出现明显下降。

An organic nano semiconductor composite photocatalytic material with magnetic response is prepared and applied in photocatalytic adsorption and degradation of organic dye(methylene blue).The morphology,structure and optical absorption properties of the as-prepared product are characterized by scanning electron microscopy(SEM),transmission electron microscopy(TEM),infrared spectroscopy(FT-IR)and ultraviolet-visible spectroscopy.It is found through the adsorption and photocatalytic degradation experiments of organic dye under visible light that Fe_(3)O_(4)-PTCDI nanocomposites exhibit good adsorption and photocatalytic activity.The removal efficiencies of methylene blue over Fe_(3)O_(4)-PTCDI nanocomposites reach 76.4%and 72.2%,respectively after adsorption and photocatalytic degradation under ultraviolet and visible light,respectively.After six runs of cycling experiments,the removal efficiency decreases slightly.In addition,as a photocatalyst,Fe_(3)O_(4)-PTCDI nanocomposites exhibit relatively high magnetic responsiveness.