1. College of Chemistry and Materials Engineering Wenzhou University Wenzhou 325035 P. R. China
2. Department of Chemistry Faculty of Sciences Tarbiat Modares University P.O. Box 14155-4838 Tehran Iran
3. State Key Laboratory of High-Efficiency Coal Utilization and Green Chemical Engineering and Ningxia Key Laboratory for Photovoltaic Materials Ningxia University Yin Chuan 750021 P. R. China