Fig. 9: Process of fabrication of r-GONR oil sorbent, and oil desorption and reuse test.

Schematic of (a) fabrication of r-GONR oil sorbent and (b) the oil desorption and reuse process of the r-GONR-coated oil sorbents: b-(i) Joule-heating effect and b-(ii) photothermal effect.