Chromium Ion Accumulations from Aqueous Solution by the Eichorinia crassipes Plant and Reusing in the Synthesis of Cr-Doped ZnO Photocatalyst

Table 2

Comparison of photocatalytic activity of Cr-doped ZnO with related literature in the degradation of MB dye.

Catalyst	Weight (g)	Concentration (ppm)	Time (min)	Degradation (%)	Ref.
Fe3O4/ZnO	0.20	100	120	88.5	[53]
2%Fe–ZnO	1.00	10	180	92	[54]
ZnO NPs	0.02	10	150	94	[55]
NiO-ZnO	0.18	10	120	74.86	[56]
Cr-doped ZnO (D1)	0.025	10	90	80	This work