Table 8.

Nickel ion-imprinted polymer materials, performance, and characterization.

Substrate	Components	Crosslinker	Method	Adsorption Capacity	pH	Characterization	Ref.
	DPC, MAA	EGDMA	FRP	86.3 mg/g	7	FTIR, SEM, XRD, EDX	[143]
Fe3O4-SiO2	TNT, TEOS	-	Sol-gel	2.64 mg/g	7.6	FTIR, SEM, EDX, XRD	[144]
diacetylmonoxine modified chitosan	-	glyoxal	Condensation	135 mg/g	5	FTIR, XRD, ¹H NMR, ¹³C NMR, SEM, EDX	[145]
-	Vbamp	EGDMA	FRP		4–7	FTIR, UV-VIS, SEM	[146]