Enhanced Tetracycline Degradation Performance of In-situ Induced Ag/Cu2O Composite by Mussel

To develop persulfate (PS) activation for effective treatment of water containment was meaningful and important. Cuprous oxide (Cu2O) was an abundant, cheap metal-oxide material, has attracted much attention for various fields. In this work, the Cu2O was used to activate PS via the oxidative disproportionation process of electron migration. Meanwhile, the redox disproportionation process would affect the PS activation. To overcome this troublesome. Here, a Schottky junction of Ag/Cu2O composite was designed to affect electronic transmission by in-situ decorated process with biomass materials in mild condition. The Ag/Cu2O/PS exhibited highly efficient activity for tetracycline (TC) degradation by PS activation, the 95% of TC was removed within 30 min, which was 1.84 times higher than Cu2O/PS system. Besides, the response surface methodology (RSM) was used to determine the relationship of pH values, TC concentration and PS dosage for TC degradation. The optimal pH value, TC concentration and PS dosage was selected as 7.0, 30 mg/L and 300 mg/L, respectively. The trapping experiments demonstrated the (OH)-O-center dot and SO4 center dot- radicals took part in the degradation process and the relative contribution of each radial was calculated. This work would provide new insight to develop efficiency by PS activation.