Co3O4-ZnO/rGO catalyst preparation and rhodamine B degradation by sulfate radical photocatalysis

Zhanmei ZHANG,Yi ZHANG,Xilin CHEN,Ziran HUANG,Zuqin ZOU,Huaili ZHENG

1Key Laboratory of Hydraulic and Waterway Engineering of the Ministry of Education,School of River and Ocean Engineering,Chongqing Jiaotong University,Chongqing 400074,China

2National Engineering Research Center for Inland Waterway Regulation,Chongqing 400074,China

3College of Environment and Ecology,Chongqing University,Chongqing 400044,China

Fig.S1.SEM image of Co3O4/rGO (a),ZnO/rGO (b).

Fig.S2.XPS spectra of Co3O4-ZnO/rGO,Co3O4/rGO and ZnO/rGO.

Fig.S4.Degradation of RhB in photocatalytic system.

Fig.S5.XPS spectra of elements of Co3O4-ZnO/rGO before and after use

Fig.S6.XPS spectra of Co valence state changes before and after the reaction.