1. The Key Lab of Low-carbon Chemistry & Energy Conservation of Guangdong Province, School of Materials Science and Engineering, School of Chemical Engineering and Technology, Sun Yat-sen University, 135 Xingang West Road, Haizhu District, Guangzhou 510275, P. R. China
2. Nanya Middle School of Changsha, 178 Xiangzhang East Road, Yuhua District, Changsha City 410000, P. R. China
3. Laboratory of Alternative Energy Conversion Systems, Department of Mechanical Engineering, School of Engineering, University of Thessaly, Pedion Areos, Volos 383 34, Greece