Zeng Feihu Zeng, Chen Xiaohua, Feng Wang, SyYi Sim, Lu Huangteng. Characterization and Application of Na/SnO₂ Catalyst in Biodiesel Production: Insights into Structure and Performance. IJIE. 2026;18(1):72-83. Accessed July 22, 2026. https://publisher.uthm.edu.my/ojs/index.php/ijie/article/view/24353