1. School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, P. R. China
2. Hebei Key Laboratory of Boron Nitride Micro and Nano Materials, Hebei University of Technology, Tianjin 300130, P. R. China
3. Department of Chemistry, Physics and Atmospheric Science, Jackson State University, 1400 J.R. Lynch Street, Jackson, Mississippi 39217, United States