氮掺杂石墨烯/四氧化三铁复合物负载含硫氮杂钴卟啉光催化降解有机污染物

摘要

将四羟甲基四(1,4-二噻1916rn)四氮杂钴卟啉[CoPz(hmdtn)4]负载在氮掺杂石墨烯/四氧化三铁(N-graphene/Fe3O4)复合物上制备了复合催化剂N-graphene/Fe3O4/CoPz(hmdtn)4,利用XRD、TEM和IR等对其进行了表征,并考察了复合催化剂的光催化性能,以及加入不同活性物种的淬灭剂对其光催化活性的影响.结果表明,复合催化剂N-gra-phene/Fe3O4/CoPz(hmdtn)4具有较好的光催化性能,在以氙灯作为光源模拟太阳光的条件下,光照8 h 可使有机染料罗丹明B(RhB)的降解率达到92%;空穴(h+)、羟基自由基(·OH)、超氧负离子自由基(O-2·)和单线态氧(1 O2)是此光催化过程中的主要活性物种.%We prepared composite catalyst N-graphene/Fe3O4/CoPz(hmdtn)4by loading cobalt tetra(2-hydroxym-ethyl-1,4-dithiin)porphyrazine[CoPz(hmdtn)4] on N-graphene/Fe3O4composite,and characterized its structure by XRD,TEM,and IR.Moreover,we investigated the photocatalytic activity of the composite catalyst,and analyzed the effect of different active species of quenchers on the photocatalytic activity of the composite catalyst.The results indicate that the composite catalyst shows a better photocatalytic activity,and the photodegradation rate of RhB catalyzed by the com-posite catalyst reaches 92% under simulated sunlight for 8 h which uses xenon lamp as a light source.Hole(h+),hydrox-yl radical(·OH),superoxide anion radical(O-2·),and singlet oxygen(1 O2) are the main active species in the photo-catalytic process.