摘要
设计了反相微乳液法制备单片层层状双金属氢氧化物(LDHs)及其吸附性能研究的综合性实验。首先采用二氯甲烷/乙醇/水无表面活性剂反相微乳液作为微反应器合成了CoAl-LDH材料,通过X-射线衍射、红外光谱对其进行表征分析;然后以甲基橙为探针对其吸附性能进行了探索并建立了吸附模型。结果表明:反相微乳液法比共沉淀法合成的CoAl-LDH材料有更好的吸附性能,对甲基橙的吸附符合Langmuir等温吸附模型和拟二级动力学模型,理论饱和吸附量为178.89mg·g^(-1)。CoAl-LDH对甲基橙的吸附是外表面吸附与离子交换共同作用的结果。
Monolayer layered double hydroxides(LDHs)were prepared by a reverse microemulsion method,and their adsorption properties were studied.Firstly,monolayer CoAl-LDH was synthesized employing dichloromethane-ethanol-water surfactant-free reverse microemulsion as a microreactor.The as-prepared CoAl-LDH was characterized by X-ray diffraction and infrared spectroscopy.The adsorption property was studied employing methyl orange as a probe.The results show that the monolayer CoAl-LDH material synthesized by reverse microemulsion method has better adsorption capacity than that synthesized by coprecipitation method.The adsorption of methyl orange conforms to Langmuir model and pseudo second-order kinetic model.The theoretical saturated adsorption capacity is 178.89 mg/g.The adsorption of methyl orange by CoAl-LDH is attributed to the synergy of external surface adsorption and ion exchange.
作者
杨修洁
吴鲁楠
胡若娜
王伟港
殷长龙
刘东
YANG Xiujie;WU Lunan;HU Ruona;WANG Weigang;YIN Changlong;LIU Dong(College of Chemical Engineering,China University of Petroleum(East china),Qingdao 266580,Shandong,China)
出处
《实验室研究与探索》
CAS
北大核心
2021年第5期1-4,67,共5页
Research and Exploration In Laboratory
基金
国家自然科学基金项目(21502227)
中央高校基本科研业务费(19CX02040A,18CX05024A)
中国石油大学(华东)教学改革项目(QN201709,ZY-202009)。
关键词
反相微乳液
层状双金属氢氧化物
单片层
吸附
reverse microemulsion
layered double hydroxides(LDHs)
monolayer
adsorption
