Nanocomposites of ionic liquids confined in mesoporous silica gels: preparation, characterization and performance

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	Nanocomposites of ionic liquids confined in mesoporous silica gels: preparation, characterization and performance
	Zhang QH(张庆华); Liu SM(刘士民); Shi F(石峰); Deng YQ(邓友全); Shi F(石峰)
刊名	Physical Chemistry Chemical Physics
	2010
卷号	12 页码:1971-1981
ISSN号	1463-9076
通讯作者	邓友全 ; 石峰
中文摘要	A series of nanocomposites of ionic liquids (ILs) were prepared via a modified sol–gel method. The ILs were physically confined in mesoporous silica gels with 5–40% content. ILs from imidazolium, thiophenium and ammonium with different anions were prepared and used. Characterization using the Brunauer–Emmett–Teller (BET) method, Fourier transform infrared (FT-IR) spectroscopy, temperature-programmed desorption (TPD), differential scanning calorimetry (DSC), inverse gas chromatography (IGC), temperature-controlled Raman and fluorescence emission spectroscopies was conducted to explore any confinement effects. BET results showed that, depending on the ILs and their contents, the average pore diameter of the pure silica gel was 3–12 nm after the confined ILs were removed completely. It was suggested that ILs aggregated on the nanoscale in the mesoporous silica gel. In comparison with bulk ILs and ILs coated onto silica gels (IL/sg), IL nanocomposites (IL–sg) displayed remarkably low specific heat capacities (Cp was in the range 0.3–1.2 Jg-1K-1), disordered vibrational conformations (without phase transitions in the range 100–200 1C), greater interactions with hydrocarbon solutes (adsorption capacities of 0.3–0.4 g per 100 g for confined ILs with CO2 gas), and greatly enhanced fluorescence emission (up to 200 times stronger than bulk ILs). Furthermore, Based on the specific solubility of different compounds, the nanocomposites could also be applied to the separation of CO2 from CO2/N2 mixtures and thiophene from thiophene/octane mixtures.
学科主题	物理化学
收录类别	SCI
资助信息	National Natural Science Foundation of China (No. 20533080)
语种	英语
WOS记录号	WOS:000274405100040
公开日期	2012-11-28
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/2242]
专题	兰州化学物理研究所_绿色化学研究发展中心
通讯作者	Shi F(石峰); Deng YQ(邓友全); Shi F(石峰)
推荐引用方式 GB/T 7714	Zhang QH,Liu SM,Shi F,et al. Nanocomposites of ionic liquids confined in mesoporous silica gels: preparation, characterization and performance[J]. Physical Chemistry Chemical Physics,2010,12:1971-1981.
APA	张庆华,刘士民,石峰,邓友全,&石峰.(2010).Nanocomposites of ionic liquids confined in mesoporous silica gels: preparation, characterization and performance.Physical Chemistry Chemical Physics,12,1971-1981.
MLA	张庆华,et al."Nanocomposites of ionic liquids confined in mesoporous silica gels: preparation, characterization and performance".Physical Chemistry Chemical Physics 12(2010):1971-1981.