Research Article
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 4
XPS spectra of (a) C 1s, (b) Zn 2p, (c) Bi 4f, and (d) O 2s in according to ZnBi2O4 and CDs (2%)-ZnBi2O4.
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