1. College of Environmental Science and Engineering, Ministry of Education Key Laboratory of Pollution Processes and Environmental Criteria, Nankai University, Tianjin 300350, China
2. Department of Chemical and Biomolecular Engineering, National University of Singapore, Singapore 117585, Singapore
3. Department of Electrical Engineering and Electronics, University of Liverpool, Liverpool L69 3GJ, U.K.
4. Institute of Chemical and Engineering Sciences, A* STAR, 1 Pesek Road, Jurong Island, Singapore 627833, Singapore
5. School of Energy and Environmental Engineering, Tianjin Key Laboratory of Clean Energy and Pollution Control, Hebei University of Technology, Tianjin 300401, China