| Nanocomposites of ionic liquids confined in mesoporous silica gels: preparation, characterization and performance | |
| Department | 绿色化学研究发展中心 |
Zhang J(张娟); Zhang QH(张庆华) ; Li XL(李雪礼); Liu SM(刘士民); Ma YB(马昱博); Shi F(石峰); Deng YQ(邓友全)
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| 2010 | |
| Source Publication | Physical Chemistry Chemical Physics
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| ISSN | 1463-9076 |
| Volume | 12Pages:1971-1981 |
| Abstract | 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. |
| Subject Area | 物理化学 |
| Funding Organization | National Natural Science Foundation of China (No. 20533080) |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | 绿色催化课题 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.licp.cn/handle/362003/2242 |
| Collection | 绿色化学研究发展中心 |
| Corresponding Author | Shi F(石峰); Deng YQ(邓友全) |
| Recommended Citation GB/T 7714 | Zhang J,Zhang QH,Li XL,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 | 张娟.,张庆华.,李雪礼.,刘士民.,马昱博.,...&邓友全.(2010).Nanocomposites of ionic liquids confined in mesoporous silica gels: preparation, characterization and performance.Physical Chemistry Chemical Physics,12,1971-1981. |
| MLA | 张娟,et al."Nanocomposites of ionic liquids confined in mesoporous silica gels: preparation, characterization and performance".Physical Chemistry Chemical Physics 12(2010):1971-1981. |
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