Effect of silica in ordered mesoporous carbon based catalyst derived from rice husk on its characterizations and activity in synthesis of biolubricant from castor oil. Vietnam j. catal. adsorp. [Internet]. 2025 Jan. 13 [cited 2025 Feb. 28];8(4):101-9. Available from: https://jca.edu.vn/index.php/jca/article/view/542