1. College of Science, Hunan Universtiy of Science and Engineering, Yongzhou 425199, China
2. Department of Physics, Jishou University, Jishou 416000, China
3. Institute of Environmental and Energy Catalysis, School of Materials Science and Chemical Engineering, Xi’an Technological University, Xi’an 710021, China
4. School of Science, Jiangsu University of Science and Technology, Zhenjiang 212003, China