水热法合成NaP1型粉煤灰沸石的性能表征

材料工程, 2005, (8): 47-50. doi: 10.3969/j.issn.1001-4381.2005.08.012

水热法合成NaP1型粉煤灰沸石的性能表征

汪飞 ^1, , 吴德意 ^2, , 何圣兵 ^3, , 孔海南 ^4, , 胡湛波 ^5, , 叶春 ^6,

1.上海交通大学,环境科学与工程学院,上海,200240

2.上海交通大学,环境科学与工程学院,上海,200240

3.上海交通大学,环境科学与工程学院,上海,200240

4.上海交通大学,环境科学与工程学院,上海,200240

5.上海交通大学,环境科学与工程学院,上海,200240

6.中国环境科学研究院水环境研究所,北京,100012

基金项目: 国家高技术研究发展计划(863计划)(2003AA601040-02)

关键词：粉煤灰 , 沸石 , 合成 , 表征 , NaP1

Property Characterization of NaP1 Zeolite From Coal Fly Ash by Hydrothermal Synthesis

通过碱性介质中的水热反应,由粉煤灰合成了单一沸石矿物种的NaP1沸石,并对合成产品进行了表征.经粉晶X射线衍射鉴定,合成产物中主要矿物成分为NaP1沸石,另有少量尚未反应的石英和莫来石.在电子显微镜下,粉煤灰颗粒呈球形且表面光滑,而合成产物颗粒表面粗糙.粉煤灰合成沸石含有大量的交换性Ca2+,且与粉煤灰原料相比,SiO2含量明显减少,Al2O3稍有增加,SiO2/Al2O3比值由3.3降至1.8.红外光谱分析和差热分析证实了合成的粉煤灰沸石中沸石水的存在.NaP1型粉煤灰沸石的阳离子交换容量(CEC)达213 cmol/kg,比表面积达29 m2/g,分别比粉煤灰高约100倍和26倍.

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