混合表面活性剂与调节pH值法高效合成MCM-48 |
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引用本文: | 翟尚儒,张晔,吴东,孙予罕. 混合表面活性剂与调节pH值法高效合成MCM-48[J]. 化学学报, 2003, 61(3): 345-349 |
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作者姓名: | 翟尚儒 张晔 吴东 孙予罕 |
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作者单位: | 中国科学院山西煤炭化学研究所,煤转化国家重点实验室,太原,030001 |
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基金项目: | 国家自然科学基金 (No .2 99730 57),国家重点基础研究专项基金 (No.2 0 0 0 0 4 80 0 1 )资助项目 |
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摘 要: | 以正硅酸乙酯(TEOS)为硅源、十六烷基三甲基溴化铵(CTAB)与曲拉通X- 100(TX-100)热合成中孔MCM-48.在合成过程中通过调节溶液pH值可有效提高MCM- 48的收率和水热稳定性,同时采用剂使模板剂的利用效率达到了6.0TEPOS/1.0 Surf.并通过XRD、N_2-吸附/脱附和FT-IR等测试手段对产物进行了表征.
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关 键 词: | 硅酸酯 十六烷基三甲基溴化铵 水热反应 模板剂 X射线衍射分析 吸附 解吸 傅里叶变换 红外分光光度法 |
修稿时间: | 2002-07-03 |
Efficient Synthesis of Mesoporous MCM-48 by Using Mixed Surfactants and pH Adjustment Method |
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Affiliation: | State Key Laboratory of Coal Conversion,Institute of Coal Chemistry, Chinese Academy of Sciences |
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Abstract: | Mesoporous molecular sieves MCM-48 were hydrothermally synthesized by using tetraethylorthosilicate (TEOS) as silica source and mixed surfactants of cetyltrimethylammonium bromide (CTAB) and Triton X-100 (TX-100) as co-template. The yields and hydrothermal stability of MCM-48 could be increased considerably by adjusting the pH values of the solutions which had been statically crystallized for a certain time. At the same time, the utilizing efficiency of the mixed surfactants was higher than that using CTAB alone as the template. The synthesized samples were characterized by XRD, N 2 adsorption-desorption isotherms and FT-IR methods. |
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Keywords: | MCM-48 mixed surfactants efficient synthesis |
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