1. School of Science, Hubei University of Technology, No. 28, Nanli Road, Hong-shan District, Wuhan 430068, China
2. School of Civil Engineering, Architecture and Environment, Hubei University of Technology, No. 28, Nanli Road, Hong-shan District, Wuhan 430068, P. R. China
3. School of Materials Science and Engineering, Nanyang Technological University, 50 Nanyang Avenue, Singapore 639798, Singapore