1. School of Environment and Energy, Guangdong Provincial Key Laboratory of Solid Wastes Pollution Control and Recycling, South China University of Technology, Guangzhou, Guangdong 510006, China
2. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, Guangdong 510640, China
3. College of Chemistry and Environmental Engineering, Shenzhen University, Shenzhen, Guangdong 518060, China
4. Department of Mechanical and Materials Engineering, University of Western Ontario, London, Ontario N6A5B9, Canada