Study On Adsorption Of Imidazolium Ionic Liquids By Mesoporous Carbon

The porous carbon material was be widely used in the field of adsorption, gas storage, catalysis, and super capacitors owing to its excellent characters, high surface area, easily-controlled pores, adjustable pore size, large pore volume, good thermal conductivity, electrical conductivity and chemical inertia. And with the deepening of the research and development of carbon materials for the synthesis of porous carbon materials and its pore size, pore volume, morphology is also becoming more wide spread and accurate. So the processing of material preparation is fussy and large cost must be paid. However, there must be some limitations in the application, for example the separation of adsorbent powder. It is easy to cause the secondary pollution of water bodies. So, in the use of mesoporous carbon materials as adsorbent, mesoporous materials are always fabricated incorporating with magnetic nanoparticles. Magnetic mesoporous carbon was prepared by a reliable method and used as adsorbent to remove the pollutant release from aqueous solution, with the magnets it can be easily separated.The main effort of this study is synthetic of novel porous carbon materials form three kinds of carbon precursors and the structure of these novel porous carbon materials was be tested. Moreover, applications of these carbon materials on ILs adsorption, separation, and desorption.Using Vanillinas the carbon source, the mesoporous carbon materials has been prepared form hard template method. The results shown that mesoporous materials own the large specific surface area(1073.65 m2 g-1). The maximum adsorption capacity value for [Bmim]Cl ILs is 207.54 mg g-1. A commercial activated carbon with high surface area was used to adsorption of [Bmim]Cl compare with that of the prepared OMC adsorbent. The maximum adsorption amount of AC is only 107 mg g-1. Obviously, AC shows lower adsorption capacity than OMC samples.Using sucrose and FeCl3?6H2O as the carbon/iron source, the Fe/OMC composite materials has been prepared form hard template method. The results shown that this mesoporous composite materials own the large specific surface area and magnetism. Magnetic measurement revealed the ferromagnetic property of Fe/OMC at room temperature with saturation magnetization value at 26.113 emu g-1. Fe/OMC as the adsorbents could be separated by magnetic and regenerated. The above results demonstrate that the as-prepared magnetic mesoporous carbon is an efficient magnetically separable sorbent for wastewater treatments. After 8 recycle runs, the adsorption capacity decreased very little.Choosing glucose and Ni(NO3)2?6H2O as carbon/nickel precursor, mesoporous carbon material, which have large pore size, high nickel content, was synthesized by direct carbonization method. The material shows good adsorption capability for [Bmim]Cl ILs. After 8 recycle runs, the adsorption capacity decreased very little.