1. School of Chemistry and Chemical Engineering, University of Jinan, Jinan 250022, Shandong, P. R. China
2. School of Materials Science and Engineering, Nanyang Technological University, Singapore 639798, Singapore
3. Shandong Provincial Key Laboratory of Preparation and Measurement of Building Materials, University of Jinan, Jinan 250022, Shandong, P. R. China
4. School of Electrical and Electronic Engineering, Nanyang Technological University, Singapore 639798, Singapore