乙二醇—变频微波—水热法制备优质镁铝水滑石及表征  

Glycol-Frequency Microwave-Hydrothermal Synthesis and Characterization of Excellent Quality Mg-Al Hydrotalcite

作　　者：吴健松[1] 梁海群 肖应凯[3] 林加免[1] 

机构地区：[1]湛江师范学院化学科学与技术学院,广东湛江524048 [2]广东省高州市第一中学,广东高州525200 [3]中国科学院青海盐湖研究所//中国科学院盐湖资源与化学重点实验室,青海西宁810008

出　　处：《中山大学学报（自然科学版）》2010年第3期70-74,共5页Acta Scientiarum Naturalium Universitatis Sunyatseni

基　　金：国家自然科学基金资助项目(40976074);湛江市2007年科技攻关资助项目(2007C09018);湛江师范学院自然科学研究基金资助项目(L0707)

摘　　要：以MgCl2·6H2O、AlCl3·6H2O、Na2CO3为原料,采用乙二醇—变频微波—水热法制备了优质镁铝水滑石。样品用XRD、SEM、TEM、IR、TG-DAT、N2吸附—解吸进行了物相、粒度、晶体形貌结构、红外分析、热分析和比表面分析。考察了传统水热法、变频微波—水热法、乙二醇—水热法、乙二醇—变频微波—水热法四种工艺对水滑石晶形、结构、分散性、规整性的影响。实验发现,在水热反应体系中加入φ=10%的乙二醇,调节变频微波炉反应温度为120℃,反应时间为5 h时可获得晶形好、板层结构显著、规整性好、分散性好的优质镁铝水滑石,透射电镜示粒子直径约在200 nm。A regular nanocrystalline supramolecular Mg-Al hydrotalcite was prepared via glycol-frequency microwave-hydrothermal using MgCl2·6H2O,AlCl3·6H2O,Na2CO3 as raw material as precipitator.Hydrotalcite samples were characterized by X-ray diffraction（XRD）,scan electron microscope（SEM）,transmission electron microscope（TEM）,IR,thermal analysis（TG-DTA）,and BET-N2 surface area measurements.The images of SEM and TEM showed that the hydrotalcite exhibited as a homogeneous and hexagonal sheet.The XRD result indicated that the hydrotalcite was well crystallized.The influences of tradition hydrothermal,frequency microwave-hydrothermal and glycol-frequency microwave-hydrothermal on the sample character were investigated.A Mg-Al hydrotalcite with well-defined shape,obvious intercalated structure,well regular quality and well-dispersing capability was obtained when glycol volume ratio was 10% at 120 ℃ for 5 h.

关 键 词：变频微波 乙二醇 水热法 镁铝水滑石 

分 类 号：O611.6[理学—无机化学]