1. Zn_1.2H_0.6PW₁₂O₄₀ Nanotubes with Double Acid Sites As Heterogeneous Catalysts for The Production of Biodiese from Waste Cooking Oil

 Jing Li, Xiaohong Wang,* Weimin Zhu, Fenghua Cao

 ChemSusChem 2009, 2, 177-183.