1. College of Chemistry and Chemical Engineering, Southwest Petroleum University, Xindu Road 8, Chengdu, Sichuan 610500, China
2. College of Agriculture, Engineering, and Science, School of Chemistry and Physics, University of KwaZulu-Natal, Durban 4000, South Africa
3. State Key Laboratory of Oil and Gas Reservoir Geology and Exploitation, Southwest Petroleum University, Xindu Road 8, Chengdu, Sichuan 610500, China