1. Department of Mathematics and Physics Henan Province International Joint Laboratory of Materials for Solar Energy Conversion and Lithium Sodium based Battery Luoyang Institute of Science and Technology Luoyang 471023 P. R. China
2. Material Science and Engineering School Luoyang Institute of Science and Technology Luoyang 471023 P. R. China
3. School of Environmental Engineering and Chemistry Luoyang Institute of Science and Technology Luoyang 471023 P. R. China