Fig. 2From: Renewable Lignosulfonate-Assisted Synthesis of Hierarchical Nanoflake-Array-Flower ZnO Nanomaterials in Mixed Solvents and Their Photocatalytic PerformanceSEM images of ZnO with amount of SL of: (a) 0 g, (b) 1 g, (c) 3 g, (d) 5 g, (e) 7 g (f) 9 g, and (g) 11 gBack to article page