Fig. 5
From: Nb2O5 monolith as an efficient and reusable catalyst for textile wastewater treatment
Response surface for methylene blue degradation using Nb2O5/Al2O3/Al catalyst. Ref.: (a) pH = 6; (b) \( {\mathrm{C}}_{{\mathrm{H}}_2{\mathrm{O}}_{2,0}} \) = 60 mM; (c), ω = 5.24 \( {\mathrm{kg}}_{{\mathrm{Nb}}_2{\mathrm{O}}_5} \) m−3