Abstract: Kenyaite was widely used in catalysis and adsorption due to its catalytic，adsorption and ion-exchange properties. The kenyaite as a single phase was successfully prepared by hydrothermal synthesis method，the silicon source and the alkali source were precipitated silica with high purity and low prices，sodium carbonate (AR)，and sodium hydroxide (AR) respectively. The influence of key reaction parameters，including reaction time and temperature，were studied. The resultant crystals were characterized by XRD，SEM，IR，XRF and Simultaneous thermal analyzer. Results showed that the temperature is a major factor affecting kenyaite preparation and the best crystallized conditions for perfect kenyaite is achieved at crystallization temperature of 170℃ and crystallization time of 24h. The as-synthesized magadiite has a rosette like morphology and has high stability under the temperature of 250℃.

Key words: kenyaite, hydrothermal synthesis, characterization, magadiite, kenyaite, hydrothermal synthesis, characterization, magadiite

摘要： 水羟硅钠石（kenyaite）以其良好的离子交换性、吸附性和热稳定性而被广泛应用于催化和吸附等领域。本文以高纯度且价格低廉的沉淀白炭黑为硅源、以碳酸钠（分析纯）和氢氧化钠（分析纯）为碱源，水热法制备了高纯度的单一晶相的水羟硅钠石，考察了反应时间和反应温度对制备的影响。利用X射线衍射仪（XRD）、扫描电子显微镜（SEM）、红外光谱仪（IR）、X射线荧光光谱仪（XRF）和同步热分析仪等对样品进行了测试表征。实验结果表明，温度是影响kenyaite制备的主要因素，单一晶相水羟硅钠石的最佳晶化合成条件为晶化温度为180℃，晶化时间为24h，所制备的水羟硅钠石形态为玫瑰花形且其热稳定性在350℃以下。

关键词: 水羟硅钠石, 水热合成, 表征, 麦羟硅钠石, 水羟硅钠石, 水热合成, 表征, 麦羟硅钠石