2.3.2. Preparation of the ZnCo2O4/Ag3PO4Composites
0.612g AgNO3 was added to 30 ml of silver nitrate solution, and also ZnCo2O4 (0.1g, 0.2 g, and 0.3g) was added to the silver nitrate solution, sonicated for 30 min to disperse ZnCo2O4 evenly, then slowly added to 30 ml of solution having 0.43g Na2HPO4·12H2O and stirred at room temperature for 120 min. After that, the product was filtered and precipitated by centrifugation, cleaned with deionized water and anhydrous ethanol, dried at 60 °C, and three ZnCo2O4/Ag3PO4catalysts with different ZnCo2O4contents were obtained, which were labeled as 0.1 ZnCo2O4/Ag3PO4,0.2 ZnCo2O4/Ag3PO4, and 0.3 ZnCo2O4/Ag3PO4, respectively. A single Ag3PO4 was prepared for comparative study.