Abstract
A novel visible-light-driven photocatalyst of Ag/AgGaO2 metal semiconductor heterostructures (MSH) has been prepared by a combined sol-gel and ion exchange method. XRD, DRS, SEM, PL and XPS were employed to characterize the as-synthesized samples. The Ag/AgGaO2 MSH exhibited a remarkably high photocatalytic activity for the degradation of methyl blue (MB) under visible light irradiation. The degradation rate of Ag/AgGaO2 MSH reached to 95% in decomposing MB for 180 min, which is 31.2% higher compared to that of pure AgGaO2 photocatalyst. The improved photocatalytic performance of Ag/AgGaO2 MSH could be ascribed to the synergistic effect, which is the enhanced visible-light absorption and efficient electron-hole separation. This suggests that Ag/AgGaO2 MSH would have a potential application in the fields of dye wastewater purification.
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