Fig. 2
From: Nb2O5 monolith as an efficient and reusable catalyst for textile wastewater treatment
XRD patterns: (a) anodic alumina generated during the anodizing process, (b) reference TT-Nb2O5 (JCPDS 28–0317), (c) Nb2O5/Al2O3/Al monolith
Fig. 2 | Sustainable Environment Research