Low Melting Point and High Stability Polyoxomolybdate-based Ionic Liquids as Photocatalysts  

作　　者：DONG Tao CHEN Fa-wang CAO Min-hua HU Chang-wen 

机构地区：[1]Department of Chemistry, Institute for Chemical Physics, Beijing Institute of Technology, Beijing 100081, P. R. China [2]School of Material Engineering, Jinling Institute of Technology, Nanjing 211169, P. R. China

出　　处：《Chemical Research in Chinese Universities》2011年第1期11-14,共4页高等学校化学研究（英文版）

基　　金：Supported by the National Natural Science Foundation of China(Nos20731002, 10876002);the Specialized Research Fund for the Doctoral Program of Higher Education of China(No200800070015);the Program of Cooperation of the Beijing Education Commission, China(No20091739006);the Program of Cooperation of the Beijing Technology Commission, China(No Z09010300820902);the Program for New Century Excellent Talents in University of China

摘　　要：The polyoxometalate-imidazole ionic liquids（POM-ILs） with low melting points at 94.5 and 95.5 ℃, [Cn mim]a[MosO26]（Cn mim=1-alkyl-3-methylimidazolium, n=12,14）, have been successfully synthesized and characterized by DSC, single-crystal X-ray diffraction and TGA, etc. The two POM-ILs have relatively high stability with decomposing temperature up to about 347 and 344 ℃, respectively. Further photocatalytic performance was measured via the degradation of rhodamine B（RB） in aqueous solution. The experiments show that the conversion reached to 90% after 90 min under UV-light and the degradation efficiency depended on pH value, different dosages and so on. In addition, the catalysts can be recycled for several times without significant loss of activity.The polyoxometalate-imidazole ionic liquids（POM-ILs） with low melting points at 94.5 and 95.5 ℃, [Cn mim]a[MosO26]（Cn mim=1-alkyl-3-methylimidazolium, n=12,14）, have been successfully synthesized and characterized by DSC, single-crystal X-ray diffraction and TGA, etc. The two POM-ILs have relatively high stability with decomposing temperature up to about 347 and 344 ℃, respectively. Further photocatalytic performance was measured via the degradation of rhodamine B（RB） in aqueous solution. The experiments show that the conversion reached to 90% after 90 min under UV-light and the degradation efficiency depended on pH value, different dosages and so on. In addition, the catalysts can be recycled for several times without significant loss of activity.

关 键 词：POLYOXOMETALATE Ionic liquid 1-Alkyl-3-methylimidazolium Photocatalytic activity 

分 类 号：O646.1[理学—物理化学] O643.36[理学—化学]