1. Key Laboratory of Renewable Energy, Chinese Academy of Sciences, Guangzhou, P. R. China
2. Guangdong Key Laboratory of New and Renewable Energy Research and Development, Guangzhou, P. R. China
3. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou, P. R. China
4. R&D Center of Xuyi Attapulgite Applied Technology, Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Xuyi, People’s Republic of China