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以有序介孔硅基材料(SBA1-5)为模板,丙烯酸低聚物为前驱物合成有序介孔结构的炭材料(OMC),并以化学方法将含氮基官能团嫁接在有序介孔炭的表面。利用扫描电子显微镜(SEM),透射电子显微镜(TEM),红外光谱(FT-IR),X射线衍射(XRD)和氮气吸附-脱附(BET)对介孔炭进行表征。结果表明:表面改性后有序介孔炭的结构发生一定变化,但孔道特征仍保持二维六方有序性。合成的有序介孔炭及经乙二胺表面改性后胺化有序介孔炭的比表面积、平均介孔直径、平均孔容积分别为607m2/g,4.1nm,0.62cm3/g和558m2/g,3.8nm,0.58cm3/g。对有序介孔炭及改性有序介孔炭进行的汞吸附实验,发现表面改性前后有序介孔炭对Hg(II)的吸附性能发生显著变化。嫁接胺基功能团后,其吸附容量增加一倍,表明胺基改性的OMC对汞有亲和作用。
Using ordered mesoporous silica-based materials (SBA1-5) as templates and acrylic acid oligomers as precursors for the synthesis of ordered mesoporous carbon materials (OMCs), the nitrogen-containing functional groups were chemically grafted on ordered mesoporous carbon s surface. Mesoporous carbons were characterized by scanning electron microscopy (SEM), transmission electron microscopy (TEM), infrared spectroscopy (FT-IR), X-ray diffraction (XRD) and nitrogen adsorption- desorption (BET). The results show that the structure of ordered mesoporous carbon changes somewhat after surface modification, but the pore characteristics still maintain two-dimensional hexagonal ordering. The specific surface area, average mesopore diameter and average pore volume of the synthesized ordered mesoporous carbon and the aminated ordered mesoporous carbon modified by ethylenediamine were 607m2 / g, 4.1nm, 0.62cm3 / g and 558m2 / g, 3.8 nm, 0.58 cm3 / g. Mercury adsorption experiments on ordered mesoporous carbon and modified ordered mesoporous carbon showed that the adsorption capacity of ordered mesoporous carbon on Hg (II) changed significantly before and after surface modification. After the grafting of amino functional groups, its adsorption capacity doubled, indicating that the amine-modified OMC has an affinity for mercury.