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

Chemical Research in Chinese Universities ›› 2011, Vol. 27 ›› Issue (2): 177-180.

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

DONG Tao, XU Yan-qing*, CHEN Fa-wang, CHI Ying-nan and HU Chang-wen*

State Key Laboratory of Explosion Science and Technology, Department of Chemistry, Institute for Chemical Physics, Beijing Institute of Technology, Beijing 100081, P. R. China

Received:2010-01-25 Revised:2010-04-14 Online:2011-03-25 Published:2011-03-09
Contact: HU Chang-wen E-mail:cwhu@bit.edu.cn
Supported by:
Supported by the National Natural Science Foundation of China(Nos.20671011, 20731002, 20801004, 10876002, 20801005) and the Specialized Research Fund for the Doctoral Program of Higher Education of China(No.200800070015).

Abstract

Abstract: 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.

Key words: Ionic liquid, Polyoxomolybdate, Low melting point, High stability, Photocatalytic activity

DONG Tao, XU Yan-qing*, CHEN Fa-wang, CHI Ying-nan and HU Chang-wen*. 1-Methyl-3-octylimidazolium Polyoxomolybdate Ionic Liquid with Low Melting Point and High Stability: Preparation and Photocatalytic Activity[J]. Chemical Research in Chinese Universities, 2011, 27(2): 177-180.

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

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