作者机构:[1]College of Chemistry and Material Sciences, Hebei Normal University, Shijiazhuang, Hebei 050016, China, [2]College of Sciences, Hebei University of Science and Technology, Shijiazhuang, Hebei 050018, China
相关基金:Project supported by the Natural Science Foundation of China (Nos. 20601007, 20773034), the Natural Science Foundation of Hebei Education Department (No. H2006002), the Natural Science Foundation of Hebei Province (No. B2008000143), and the Doctoral Foundation of Hebei Normal University (No. 103261)~