1. Chongqing Key Laboratory for Advanced Materials and Technologies of Clean Energies School of Materials and Energy Southwest University Chongqing 400715 P. R. China
2. Department of Chemical and Biomolecular Engineering National University of Singapore Kent Ridge 117576 Singapore
3. Key Laboratory of Laser Technology and Optoelectronic Functional Materials of Hainan Province College of Chemistry and Chemical Engineering Hainan Normal University Haikou 571158 P. R. China