Synthesis and characterization of Linde A zeolite coated with a layered double hydoxide
Synthesis and characterization of Linde A zeolite coated with a layered double hydoxide
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DOI：
10.1016/j.jeurceramsoc.2005.07.018
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发表时间：
2006
影响因子：
5.7
通讯作者：
H. Yamada;Yujiro Watanabe;T. Hashimoto;K. Tamura;T. Ikoma;S. Yokoyama;J. Tanaka;Y. Moriyoshi
中科院分区：
文献类型：
--
作者：
H. Yamada;Yujiro Watanabe;T. Hashimoto;K. Tamura;T. Ikoma;S. Yokoyama;J. Tanaka;Y. Moriyoshi
采用层状双氢氧化物（LDH）在Linde A型沸石（LTA）上的沉淀和水热处理，合成了LDH包覆的LTA。当使用氢氧化钠溶液将含有氯化镁和氯化铝的水溶液滴加到恒定pH为10的沸石-LTA悬浮液中，然后在水热条件下处理时，获得LDH包覆的沸石-LTA。扫描电子显微镜证实，分子筛-LTA的表面完全被细小的LDH颗粒所覆盖。即使在水热处理和用LDH颗粒涂覆之后，沸石-LTA的晶体结构仍得以保留，显示了本发明的多功能材料用于同时吸收有害阳离子和阴离子（例如来自废水的铵离子和磷离子）的可能应用。
Linde type A zeolite (zeolite-LTA) coated with layered double hydroxide (LDH) was synthesized by a precipitation of LDH on zeolite-LTA and a hydrothermal treatment. When aqueous solutions containing magnesium chloride, and aluminum chloride were added dropwise to zeolite-LTA suspension at the constant pH of 10 using sodium hydroxide solution and then treated at hydrothermal conditions, LDH-coated zeolite-LTA was obtained. Scanning electron micrograph confirmed that the surface of zeolite-LTA was covered completely by fine LDH particles. The crystal structure of zeolite-LTA was retained even after the hydrothermal treatment and the coating with LDH particles, showing the possible application of the present multifunctional material for simultaneous uptake of harmful cations and anions, such as ammonium and phosphorous ions from wastewater.