Ce-MCM-48分子筛的合成与吸附动力学研究  

Study on Synthesis and Adsorption Kinetics of Ce-MCM-48 Molecular Sieve

作　　者：潘健民[1,2] 成岳[3,4] 魏运洋[2] 

机构地区：[1]上海工程技术大学化学与化工学院,上海201620 [2]南京理工大学化工学院,南京210094 [3]景德镇陶瓷学院材料学院,景德镇333403 [4]江西省先进陶瓷材料重点实验室,景德镇333001

出　　处：《硅酸盐通报》2012年第4期920-924,共5页Bulletin of the Chinese Ceramic Society

摘　　要：以硅溶胶为硅源、十六烷基三甲基溴化铵(CTAB)为模板剂,采用物质的量配比为Ce2O3∶SiO2∶CTAB∶H2O∶NaOH=0.015∶1∶0.45∶60∶0.48,静态水热合成了Ce-MCM-48分子筛,采用XRD、SEM(EDS)、TEM等方法对其进行了表征,并对其进行了吸附动力学研究。结果表明,本文成功合成了Ce-MCM-48介孔分子筛,其拟一级吸附动力学方程为lg(qe-q)=-0.4365-0.01026t,R2=0.9289,拟二级吸附动力学方程为t/qt=0.4027+0.27818t,R2=0.9999,相对拟一级反应模型,这个结果相关性更好,更能真实地反映分子筛吸附亚甲蓝溶液的反应机理。Ce-MCM-48molecular sieve with MWW of layer structure was synthesized using the static hydrothermal method, silica sol as silicon source, cetyl trimethyl ammonium bromide （CTAB） as template agent. Molecular sieve of Ce-MCM-48 was characterizated by power X-ray diffraction （XRD）, scanning electron microscopy （ SEM）, energy dispersive X-ray （ EDS ）, transmission electron microscopy （TEM）. Ce-MCM-48 were used to adsorb the methylene blue （MB） in wastewater by a static method in order to study the absorption characteristics. The results show that, The target productobtained is the adsorption of MB follow the first-order kinetic model ： lg （ qe-q ） = -0.4365-0.01026t, R2 = 0.9289, and the second-order kinetic model：t/q, = 0.4027 ＋ 0.27818t,R2 = 0.9999, the second-order kinetic model reflect the mechanism of Ce-MCM-48 adsorbed methylene blue more truly.

关 键 词：Ce-MCM-48 表征 亚甲蓝 吸附动力学 

分 类 号：O647[理学—物理化学]