1-Methyl-3-octylimidazolium Polyoxomolybdate Ionic Liquid with Low Melting Point and High Stability:Preparation and Photocatalytic Activity  

作　　者：DONG Tao XU Yan-qing CHEN Fa-wang CHI Ying-nan HU Chang-wen 

机构地区：[1]State Key Laboratory of Explosion Science and Technology, Department of Chemistry,Institute for Chemical Physics, Beo＇ing Institute of Technology, Beijing 100081, P R. China

出　　处：《Chemical Research in Chinese Universities》2011年第2期177-180,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(Nos.20671011;20731002;20801004; 10876002; 20801005);the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.200800070015).

摘　　要：The polyoxometalate（POM）-imidazole ionic liquid（IL） [C8mim]2[Mo6O19]（C8mim=1-methyl-3-octylimi- dazolium） with a low melting point of 82.6 °C was successfully prepared and characterized by FTIR, XPS, NMR, TG and so on. The polyoxomolybdate-based IL has high stability, and its decomposing temperature reaches 321 °C, which is higher than that of 1-alkyl-3-methylimidazolium halides IL. Further photocatalytic performances of the IL were measured via degrading dye rhodamine B（RB） in aqueous solution under the UV light irradiation. The experiments show that the conversion of RB reaches 80.5% after 90 min under UV-light and the degradation efficiency depends on the pH value of the solution, irradiation time and the dosage of the IL and so on.The polyoxometalate（POM）-imidazole ionic liquid（IL） [C8mim]2[Mo6O19]（C8mim=1-methyl-3-octylimi- dazolium） with a low melting point of 82.6 °C was successfully prepared and characterized by FTIR, XPS, NMR, TG and so on. The polyoxomolybdate-based IL has high stability, and its decomposing temperature reaches 321 °C, which is higher than that of 1-alkyl-3-methylimidazolium halides IL. Further photocatalytic performances of the IL were measured via degrading dye rhodamine B（RB） in aqueous solution under the UV light irradiation. The experiments show that the conversion of RB reaches 80.5% after 90 min under UV-light and the degradation efficiency depends on the pH value of the solution, irradiation time and the dosage of the IL and so on.

关 键 词：Ionic liquid POLYOXOMOLYBDATE Low melting point High stability Photocatalytic activity 

分 类 号：O643.36[理学—物理化学] O646.1[理学—化学]