1. Nuclear Waste Disposal Engineering Research Center, School of Mathematics and Physics, Mianyang Teachers’ College 1 , Mianyang 621000, People’s Republic of China
2. School of Physical Science and Technology, Guangxi University 2 , Nanning 530001, People’s Republic of China
3. Guangxi Key Laboratory of Natural Polymer Chemistry and Physics, College of Chemistry and Materials, Nanning Normal University 3 , Nanning 530001, People’s Republic of China