Ag-Co3O4: Synthesis, characterization and evaluation of its photo-catalytic activity towards degradation of rhodamine B dye in aqueous medium

作者：Saeed Muhammad^*; Muneer Majid; Mumtaz Nida; Siddique Mohsin; Akram Nadia; Hamayun Muhammad

来源：Chinese Journal of Chemical Engineering, 2018, 26(6): 1264-1269.

DOI：10.1016/j.cjche.2018.02.024

• Co3O4
• Ag-Co3O4
• Photo-catalysis
• Photo-degradation
• Calotropis gigantea
• Rhodamine B
• Elay-Rideal mechanism

Synthesis, characterization of Co3O4 and Ag-Co3O4 composites and evaluation of their photo-catalytic activities towards photo-degradation of aqueous solution of rhodamine B dye under irradiation of visible light have been described in this paper. Co3O4 was prepared by solid phase mechano chemical process using Co(NO3)(2)center dot 6H(2)O and NH4HCO3 as precursor materials. Ag was deposited on Co3O4 from AgNO3 using Calotropis gigantea extract as reducing agent. XRD, SEM and FTIR were used for characterization of prepared composites. Photo-catalytic efficiencies of as-prepared Co3O4 and Ag-Co3O4 were evaluated for aqueous phase photo-degradation of rhodamine B. It was found that deposition of Ag on Co3O4 highly enhanced the photo-catalytic activity of Co3O4. Photo-catalytic degradation followed the Eley-Rideal mechanism. About 100% and 91% photo-degradation of 40 ml dye solution achieved at 313 K in 90 and 120 min over 0.05 g of Ag-Co3O4 as photo-catalyst using 100 and 200 mg.L-1 as initial concentration of dye respectively.

• 出版日期2018-6