Green synthesis of strontium-doped ZnO nanocatalyst using Guiera senegalensis leaf extract for biodiesel production from waste cooking oil
Waste cooking oil (WCO) is an increasingly useful raw material for biodiesel because its use can lower dependence on edible feedstocks and reduce disposal-related environmental problems. A major limitation, however, is its free fatty acid (FFA) content, which may interfere with conventional alkaline-catalyzed transeste...