摘要
In this study,a series of Co_3O_4/ mildly oxidized graphite oxide(mGO) nanocatalysts(Co_3O_4/ mGO-l,Co_3O_4/ mGO-2 and Co_3O_4/mGO-3) were synthesized through solvothermal method and used as a mediator for the heterogeneous peroxymonosulfate(PMS)activation.The performance of CO_3O_4 / mGO/PMS system was investigated using acid orange 7(AO7).Results showed that Co_3O_4/mGO-3 had the best degradation efficiency of AO7 and the removal rate was above 90%in about 6 min.The phenomenon indicated the catalytic activity of Co_3O_4/mGO composites was related to the oxidation degree of graphite oxide(GO).In addition,experiments showed the content of Co_3O_4 had an effect on the catalytic activity.The composites were characterized with X-ray powder diffraction(XRD),FTIR,Raman,X-ray photoelectron spectroscopy(XPS) and transmission electron microscopy(TEM).According to the charactrization and synergistic catalytic mechanism,the generation of Co—OH complexes found to be the initial step to activate PMS in the heterogeneous system of Co_3O_4/mGO hybrid.
In this study,a series of Co3O4/ mildly oxidized graphite oxide（mGO） nanocatalysts（Co3O4/ mGO-l,Co3O4/ mGO-2 and Co3O4/mGO-3） were synthesized through solvothermal method and used as a mediator for the heterogeneous peroxymonosulfate（PMS）activation.The performance of CO3O4 / mGO/PMS system was investigated using acid orange 7（AO7）.Results showed that Co3O4/mGO-3 had the best degradation efficiency of AO7 and the removal rate was above 90%in about 6 min.The phenomenon indicated the catalytic activity of Co3O4/mGO composites was related to the oxidation degree of graphite oxide（GO）.In addition,experiments showed the content of Co3O4 had an effect on the catalytic activity.The composites were characterized with X-ray powder diffraction（XRD）,FTIR,Raman,X-ray photoelectron spectroscopy（XPS） and transmission electron microscopy（TEM）.According to the charactrization and synergistic catalytic mechanism,the generation of Co—OH complexes found to be the initial step to activate PMS in the heterogeneous system of Co3O4/mGO hybrid.
基金
Innovation Program of Shanghai Municipal Education Commission,China(No.12ZZ069)
Research Fund for the Doctoral Program of Higher Education,China(No.20130075110006)
