Fig. 3
From: Zirconia-based catalyst for the one-pot synthesis of coumarin through Pechmann reaction
EDS spectrum and elemental composition of ZrO2-TiO2 (a), ZrO2-ZnO (b), and ZrO2/cellulose (c)
Fig. 3 | Nanoscale Research Letters
From: Zirconia-based catalyst for the one-pot synthesis of coumarin through Pechmann reaction
EDS spectrum and elemental composition of ZrO2-TiO2 (a), ZrO2-ZnO (b), and ZrO2/cellulose (c)