中山大学学报自然科学版 ›› 2010, Vol. 49 ›› Issue (3): 70-74.

• 研究论文 • 上一篇    下一篇

乙二醇—变频微波—水热法制备优质镁铝水滑石及表征

吴健松1,梁海群2,肖应凯3,林加免1   

  1. (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) 
  • 收稿日期:2009-09-23 修回日期:1900-01-01 出版日期:2010-05-25 发布日期:2010-05-25

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

WU Jiansong1,LIANG Haiqun2,XIAO Yingkai3,LING Jiamian1   

  1. (1Chemistry Institute of Zhanjiang Normal College, Zhanjiang 524048,China;2The First Middle School of Guangdong, Gaozhou 525200,China;3Key Laboratory of Salt Lake Resources and Chemistry//Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008,China)
  • Received:2009-09-23 Revised:1900-01-01 Online:2010-05-25 Published:2010-05-25

摘要: 以MgCl2·6H2O、AlCl3·6H2O、Na2CO3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、N2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〖WTBX〗φ〖WTBZ〗=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。

关键词: 变频微波, 乙二醇, 水热法, 镁铝水滑石

Abstract: A regular nanocrystalline supramolecular MgAl hydrotalcite was prepared via glycolfrequency microwavehydrothermal using MgCl2·6H2O,AlCl3·6H2O,Na2CO3 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N2 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.


Key words: frequency microwave, glycol, hydrothermal, MgAl hydrotalcite

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