1. Faculty of Metallurgical and Energy Engineering Kunming University of Science and Technology Kunming 650093 P. R. China
2. Faculty of Science Kunming University of Science and Technology Kunming 650093 P. R. China
3. School of Energy and Environment Science Yunnan Normal University Kunming 650092 P. R. China
4. Department of Chemical and Biological Engineering The Hong Kong University of Science and Technology Clear Water Bay Kowloon Hong Kong P. R. China
5. HKUST-Shenzhen Research Institute No. 9 Yuexing 1st RD South Area Hi-tech Park Nanshan Shenzhen 518057 P. R. China