1. School of Environment and Civil Engineering Dongguan University of Technology Dongguan Guangdong 523808 P.R. China
2. College of Energy Xiamen University Xiamen 361005 P.R. China
3. College of Chemical Engineering Zhejiang University of Technology Hangzhou 310014 P. R. China
4. Department of Chemistry College of Chemistry and Chemical Engineering Xiamen University Xiamen 361005 P.R. China
5. School of Physics University of Electronic Science and Technology of China Chengdu 610054 P. R. China