1. School of Chemical Engineering; Northwest University; No.229 Taibai North Road; Xi'an; Shaanxi; 710069; China
2. Department of Chemistry & Chemical Engineering; Xi'an University of Arts and Science; Xi'an; Shaanxi; 710069; China
3. Department of Physics; Northwest University; No.229 Taibai North Road; Xi'an; Shaanxi; 710069; China