Table 1. Comparative evaluation of hydrophobic g-C₃N₄ coated foam and other adsorbent materials in oil–water separation studies.

Sorbents	WCA (°)	Maximum absorption capacity (%)	Reference
PDMS@SiO2@WS2 sponge	158.8 ± 1.4	22–112	54
PPy-PA PU sponge	140	22–62	55
Twisted carbon fiber aerogel	—	50–192	56
Carbon nanotube sponges	156	80–180	57
Silylated wood sponge	151	16–41	58
Carbon soot sponge	144	80	59
Starch@PDMS@PU	157.7 ± 2.4	46	60
Hydrophobic g-C3N4 coated foam	144.1 ± 2	101–732	This work