高中孔率活性炭的制备与表征  

Synthesis and characterization of activated carbon with a high mesoporosity

作　　者：李艳秋[1,2] 李开喜[1] 孙国华[1] 王建龙[1] 

机构地区：[1]中国科学院山西煤炭化学研究所中国科学院炭材料重点实验室,山西太原030001 [2]中国科学院研究生院,北京100049

出　　处：《新型炭材料》2011年第2期130-136,共7页New Carbon Materials

基　　金：科技部国际合作项目(2010DFB90690-4);山西省国际合作项目(2010081031-2);国家自然科学基金(51002166;51061130536)~~

摘　　要：以线型酚醛树脂为碳源,通过形成钇-酚醛树脂配合物和水蒸气活化的方法制备了具有较高中孔率的活性炭。利用红外光谱(IR)、热重分析(TG)、氮气吸脱附曲线、扫描电镜(SEM)和X射线衍射(XRD)对所制钇-酚醛树脂配合物及相应活性炭进行了表征。结果表明:钇离子与嫁接了甲基丙烯酸甲酯的酚醛树脂之间形成钇-酚醛树脂配合物,其相应活性炭具有典型中孔炭的特征,且中孔率高达88%。钇-酚醛树脂配合物的形成,明显提高了钇元素的分散程度和钇元素的催化效率。同时,钇-酚醛树脂配合物的形成,有助于改善酚醛树脂基活性炭的孔结构和孔径分布,尤其对提高活性炭的中孔率有显著的作用。Activated carbon with a high mesoporosity was prepared by yttrium-phenolic resin complex formation,carbonization and steam activation,using novolac phenolic resin as the carbon precursor.The resins and corresponding carbons were characterized by infrared spectrometry,thermogravimetry,nitrogen adsorption scanning electron microscopy and X-ray diffraction.Results indicated that complexes were formed between yttrium and methyl methacrylate-grafted phenolic resin,and the corresponding activated carbon had a mesoporosity up to 88%.The formation of the complexes obviously improved the compatibility between the organic precursor and the inorganic salt,leading to a homogenous distribution of yttrium and its increased catalytic efficiency.And as a result,activated carbons rich in mesopores were obtained.

关 键 词：钇-酚醛树脂配合物 线型酚醛树脂 中孔炭 催化 水蒸气活化 

分 类 号：TQ424.1[化学工程]