CAJ | 학술논문

介绍球形MCM-41和球形SBA-15介孔分子筛的合成,通过XRD、N_2吸附-脱附、SEM和TEM对合成的分子筛进行了表征.结果表明:合成的介孔分子筛具有与经典方法合成的样品相似的特征参数,合成的球形MCM-41和球形SBA-15的比表面积分别为1 107m~2·g~(-1)N583 m~2·g~(-1),比孔容分别为0.69 cm~3·g~(-1)和1.27 cm~3·g~(-1),平均孔径分别为2.5 nm和7.4 nm;合成的MCM-41和SBA-15均具有很好的球形外貌;湿磨基本上不影响MCM-41的球形外貌,而SBA-15的球形外貌却很容易被破坏;合成的球形SBA-15粒尺寸大,需经过湿磨才能观测到其内部孔道结构.
개소구형MCM-41화구형SBA-15개공분자사적합성,통과XRD、N_2흡부-탈부、SEM화TEM대합성적분자사진행료표정.결과표명:합성적개공분자사구유여경전방법합성적양품상사적특정삼수,합성적구형MCM-41화구형SBA-15적비표면적분별위1 107m~2·g~(-1)N583 m~2·g~(-1),비공용분별위0.69 cm~3·g~(-1)화1.27 cm~3·g~(-1),평균공경분별위2.5 nm화7.4 nm;합성적MCM-41화SBA-15균구유흔호적구형외모;습마기본상불영향MCM-41적구형외모,이SBA-15적구형외모각흔용역피파배;합성적구형SBA-15립척촌대,수경과습마재능관측도기내부공도결구.
The mesoporous molecular sieves MCM-41 and SBA-15 with spherical morphology were synthesized.The samples were characterized by XRD,N2 adsorption-desorption analysis,SEM and TEM.The results show that the samples prepared in the research have the same typical parameters as those of the conventional hydrothermal method.The prepared MCM-41 and SBA-15 have the specific surface areas of 1 107 m~2·g~(-1) and 583 m~2·g~(-1),respectively,the specific pore volumes of 0.69 cm~3·g~(-1) and 1.27 cm~3·g~(-1) respectively,and the average pore diameters of 2.5 am and 7.4 nm respectively.Both MCM-41 and SBA-15 prepared have good spherical morphology.The wet grinding process had little effect on the morphology of MCM-41,but great effect on the spherical morphology of SBA-15.The ordered internal pore channel structure could be observed only after wet grinding because of the larger particle size of SBA-15.