1. College of Chemistry & Chemical Engineering, Key Laboratory of Chemical Additives for China National Light Industry, Shaanxi University of Science & Technology, Xi′an 710021, China
2. School of Science, Qiongtai Normal University, Haikou 571127, China
3. Key Laboratory of Auxiliary Chemistry and Technology for Chemical Industry, Ministry of Education, Shaanxi University of Science and Technology, Xi′an 710021, China