1. School of Chemistry and Chemical Engineering, The Key Laboratory of Coordination Chemistry of Jiangxi Province, Humic Acid Utilization Engineering Research Center of Jiangxi Province, Jinggangshan University, Ji’An 343009, P.R. China
2. Yangzhou University, Yangzhou 225009, P. R. China
3. Institute of Intelligent Flexible Mechatronics, Jiangsu University, Zhenjiang 212013, P. R. China
4. Jiangsu Collaborative Innovation Center of Photovoltaic Science and Engineering, Changzhou University, Changzhou 213164, P. R. China