1. Guangzhou Institute of Energy Conversion, Chinese Academy of Sciences, Guangzhou 510640, P. R. China
2. CAS Key Laboratory of Renewable Energy, Guangzhou 510640, P. R. China
3. Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development, Guangzhou 510640, P. R. China
4. R&D Center of Xuyi Attapulgite Energy and Environmental Materials, Xuyi 211700, Jiangsu, P. R. China
5. Jiangsu Senmao Energy Developments Co. Ltd, Xuyi 211700, Jiangsu, P. R. China
6. Shenyang University of Chemical Technology, Shenyang 110142, Liaoning, P. R. China