Enhanced Catalyst Activity of WO₃ Using Polypyrrole as Support for Acidic Esterification of Glycerol with Acetic Acid

Figure 2

XRD patterns of (a) WO₃ NPs and WO₃-Ppy. PNCs with particle loadings of (b) 5, (c) 10, (d) 15, (e) 20 wt%, and (f) pure Ppy, respectively.