1. School of Environmental Science and Engineering, Huazhong University of Science and Technology, Wuhan 430074, P. R. China
2. College of Chemistry, Central China Normal University, Wuhan 430079, P. R. China
3. Engineering Research Center of Photoenergy Utilization for Pollution Control and Carbon Reduction, Ministry of Education, Wuhan 430079, P. R. China
4. National Engineering Laboratory for Advanced Municipal Wastewater Treatment and Reuse Technology, Engineering Research Center of Beijing, Beijing University of Technology, Beijing 100124, China