Eco-Friendly Coffee Waste-Based Carbon Dots Coupled to ZnBi-Layered Double Hydroxide Heterojunction: Enhanced Control of Interfacial Charge Transfer for Highly Efficient Visible-Light Catalytic Activity

Figure 3

(a) Photocatalytic decomposition of 2,4-D and (b) rate constant photodecomposition of 2,4-D in the over catalysts after 120 minutes of exposure to visible radiation (catalyst: 1.0 g/L, 2,4-D: 30 mg/L at a pH of 4.2).

(a)

(b)