Su, E. C.,, Chu, Y. T. (2023, Apr.). Modification of the rGO derived from coconut shell with SO3H group for the conversion of waste cooking oil to biodiesel. 2023 The 5th International Conference on Clean Energy and Electrical Systems (ICEES) Symposium conducted at the meeting of TKP池袋カンファレンスセンター, Japan. (Oral presentation；獲最佳論文獎)