1. College of Materials and Chemical Engineering, Key Laboratory of Inorganic Nonmetallic Crystalline and Energy Conversion Materials, China Three Gorges University, Yichang, Hubei 443002, P. R. China
2. Hubei Three Gorges Laboratory, Yichang, Hubei 443007, P. R. China
3. Hubei Key Laboratory of Processing and Application of Catalytic Materials, Huanggang Normal University, Huanggang 438000, P. R. China
4. Department of Materials Science and Engineering, City University of Hong Kong, Hong Kong, SAR 999077, P. R. China