1. College of Materials Science and Engineering, Xi’an University of Architecture and Technology, Xi’an 710055, P. R. China
2. School of Civil Engineering, Northwest Minzu University, Lanzhou 730000, P. R. China
3. College of Sciences, Xi’an University of Science and Technology, Xi’an, Shaanxi 710054, P. R. China
4. Instrumental Analysis Center, Xi’an University of Architecture and Technology, Xi’an 710055, P. R. China