Mesoporous Bifunctional K2O Catalyst Using Chitosan Template for Biodiesel ProductionNor Badariah Talib, Khairil Juhanni Abd Karim, Nurrulhidayah Salamun, Salmiah Jamal Mat Rosid and Susilawati ToemenBIO Web Conf., 189 (2025) 01022DOI: https://doi.org/10.1051/bioconf/202518901022