1. Department of Chemistry Center of Super-Diamond and Advanced Films (COSDAF) City University of Hong Kong Hong Kong SAR 999077 P. R. China
2. Guangdong Key Laboratory of Environmental Catalysis and Health Risk Control School of Environmental Science and Engineering Institute of Environmental Health and Pollution Control Guangdong University of Technology Guangzhou 510006 P. R. China
3. Institute for Energy Research Jiangsu University Zhenjiang 212013 P. R. China
4. School of Life Sciences The Chinese University of Hong Kong Shatin, New Territories Hong Kong SAR 999077 P. R. China