Synthesis Of Mesoporous Carbon Materials And The Performance Research Of Separation, Preconcentration And Drug Release

Toxic and harmful substances has been threatening human health long time, and received extensive attention, so the analysis detection technology becomes the focus of research. Since the environment system is a complex matrix and the composition of materials are trace, separation and preconcentration become a necessary process before the analysis of the test. Preparation technology has a decisive effect on the separation and preconcentration of harmful substances to the environment and the reliability of the analysis results. Solid phase extraction and Solid-phase microextraction technology become an inherently high superiority of pretreatment methods, because its efficiently and rapidly separation and preconcentration of a large number of samples.This paper reviews the common technology of environmental sample preparation separation and enrichment of poisonous and harmful substance, and synthesis methods of magnetic mesoporous carbon materials and hollow mesoporous carbon materials, as well as summarized the application research progress of mesoporous carbon materials; We synthesized magnetic mesoporous carbon materials and hollow mesoporous carbon materials with simple method, and applied to the enrichment of polycyclic aromatic hydrocarbons in water and drugs load and release of tetracycline hydrochloride.With hard template of TEOS as silicon source, resorcinol and formaldehyde as the carbon source, we use the method of "one-pot" synthesized the yolk-shell structure of magnetic mesoporous carbon materials (Fe3O4@void@C) which magnetic Fe3O4particles as nuclear and mesoporous carbon layer as shell with large aperture (average aperture size of5.4nm) and strong magnetic (62-1emu g). This "one-pot" method avoids raw material loss in intermediate steps and the synthetic steps are simple. We made detailed research on the effect of raw solvent composition and ratio of TEOS and formaldehyde to the structure and morphology of Fe3O4@void@C materials. According to the evaluation of the adsorption performance of Fe3O4@void@C materials, it has a strong adsorption capacity on polycyclic aromatic hydrocarbons and could reach adsorption equilibrium in a relatively short time. Science the large adsorption quantity, magnetic separation speed, and can repeat use six times in recovery more than84%, this materials shows concentration certain superiority in the sample separation rich of water environment. By "one-pot" method, we synthesized hollow mesoporous carbon materials (HMCM) with adjustable thickness, and explored its load and release behavior of tetracycline hydrochloride. Research shows that the thickness of synthesized HMCM material can be adjusted in7-90nm, and has a large specific surface area and uniform pore size distribution. HMCM materials has a very high load capacity(850mg g-1) of tetracycline hydrochloride, and sustained-release behavior of HMCM with different thickness between15-25h, and will continue in the55h time slow release in37℃water bath. This present HMCM materials have high advantage in drug load transmission and slow release.