1. Synerigism Innovative Center of Coal Safety Production in Henan Province, College of Chemistry and Chemical Engineering, Henan Polytechnic University, Jiaozuo, Henan 454003, P. R. China
2. Henan Province Engineering Research Center of Zhang Zhongjing Classical Prescription Analysis and Development, College of Chemistry and Pharmaceutical Engineering, Nanyang Normal University, Nanyang 473061, P. R. China