Table 7 Comparison table of photocatalytic degradation of different dyes using reported and current catalysts.

CoFe₂O₄/BaFe₁₂O₁₉

Self-flash combustion

Congo Red

8 h

70%

⁶²

CoFe₂O₄

Co-precipitation

Congo Red

180 min

85.6%

⁶³

(Co_0.5Ni_0.5Fe₂O₄, CNFO)

(Co_0.5Ni_0.5Dy_0.03Fe_1.97O₄, D-CNFO)

Micro-emulsion

Congo Red

1.5 h

71.8%

⁶⁴

Co_1 − xCu_xFe₂O₄ (0-0.5)

Combustion method

Congo Red

90 min

71.37%

⁶⁵

Cu_0.1Dy_0.08Zn_0.9Fe_1.92O₄

Co-precipitation

Congo Red

105 min

90%

⁶⁶

TiO₂

Sol-gel auto-combustion

Congo Red

2 h

74%

⁶⁷

BaDy_xFe_12−xO₁₉ (x = 0.02, 0.04 0.06)

Sol-gel auto-combustion

Congo Red

90 min

84.36%, 86.47%, and 89.29%

Present work