1. Department of Chemistry, Faculty of Mathematics and Natural Science, Universitas Sriwijaya, Jl. Raya Palembang-Prabumulih Km. 32, Indralaya, Sumatra Selatan 30662, Indonesia
2. Biofuel Research Group, Faculty of Mathematics and Natural Science, Universitas Sriwijaya, Jl. Raya Palembang-Prabumulih Km. 32, Indralaya, Sumatra Selatan 30662, Indonesia
3. Chemistry Department, King Fahd University of Petroleum and Minerals, Dhahran 31261, Saudi Arabia
4. Research Center for Chemistry, Indonesian Institute of Sciences, Building 452 Kawasan PUSPIPTEK, Serpong, Tangerang Selatan, Banten 15314, Indonesia
5. Nanotechnology & Catalysis Research Centre, Universiti Malaya, Kuala Lumpur 50603, Malaysia
6. School of Chemistry and Chemical Engineering, Anshun University, Anshun, Guizhou 561000, China
7. Department of Chemical Engineering, Faculty of Engineering, Universitas Sriwijaya, Indralaya30662, Indonesia