1. MOE Key Laboratory of Pollution Processes and Environmental Criteria Tianjin Key Laboratory of Environmental Remediation and Pollution Control; College of Environmental Science and Engineering; Nankai University; Tianjin 300350 P. R. China
2. Key Laboratory of Advanced Ceramics and Machining Technology; Ministry of Education; School of Materials Science and Engineering; Tianjin University; Tianjin 300072 P. R. China
3. School of Chemistry and Chemical Engineering; Shandong University; Jinan 250100 P. R. China
4. Beijing Synchrotron Radiation Facility; Institute of High Energy Physics; Chinese Academy of Sciences; Beijing 100049 P. R. China
5. School of Materials Science and Engineering; Tianjin University of Technology; Tianjin 300384 P. R. China