1. Research Institute of Surface Engineering
2. Taiyuan University of Technology
3. Taiyuan, P. R. China
4. School of Materials Science and Engineering
5. China University of Mining and Technology
6. Xuzhou 221116, P. R. China
7. Key Laboratory of the Colloid and Interface Chemistry (Shandong University)
8. Ministry of Education
9. School of Chemistry and Chemical Engineering
10. Shandong University
11. Jinan, P. R. China