1. MOE Key Laboratory of Pollution Processes and Environmental CriteriaTianjin Key Laboratory of Environmental Remediation and Pollution ControlCollege of Environmental Science and EngineeringNankai University Tianjin 300350 P. R. China
2. Shanghai Synchrotron Radiation FacilityShanghai Advanced Research Institute Shanghai 201800 P. R. China
3. School of Materials Science and EngineeringNankai University Tianjin 300350 P. R. China
4. State Key Laboratory of Molecular Reaction DynamicsDalian Institute of Chemical PhysicsChinese Academy of Sciences Dalian 116023 P. R. China
5. Beijing Synchrotron Radiation FacilityInstitute of High Energy PhysicsChinese Academy of Sciences Beijing 100049 P. R. China
6. Department of ChemistryTianjin University Tianjin 300072 P. R. China