| 低轴径比CrCoAPO-5分子筛的合成与表征 |
| Synthesis and Characterization of Low Aspect Ratio CrCoAPO-5 Molecular Sieves |
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| 摘要: 通过控制合成液制备温度、晶体晶化速度等因素,调控CrCoAPO-5分子筛颗粒的形貌及大小。合成的分子筛颗粒采用SEM、XRD、FT-IR、UV-Vis、TG、BET、ICP-OES等进行表征。结果表明低温5℃配制的合成液引入晶种后,在传统水热条件下150℃晶化4.5 h,可制备出直径3 μm、轴径比小于0.2的六边形片状分子筛颗粒,相对于较大颗粒的样品具有较短的扩散孔道,更高的催化活性。 |
| 关键词: AFI分子筛 CrCoAPO-5 晶种 片状颗粒 |
| 基金项目: 国家自然科学基金(No.21136008,21476171)资助项目。 |
| Abstract: The crystal morphology and size of CrCoAPO-5 molecular sieves were regulated by controlling gel preparation temperature and crystallization rate. The synthesized molecular sieves were characterized by SEM, XRD, FT-IR, UV-vis, TG, BET and ICP-OES. It was shown that hexagonal plate-like CrCoAPO-5 molecular sieves could be synthesized by conventional hydrothermal crystallization at 150℃ for 4.5 h through introducing seeds into the synthetic gels that were prepared at 5℃. The 3 μm-sized CrCoAPO-5 crystals with the aspect ratio less than 0.2 could be obtained, resulting in shorter diffusion distance and better catalytic activity compared with larger ones. |
| Keywords: AFI molecular sieve CrCoAPO-5 seed crystal plate-like grains |
| 投稿时间：2014-11-03 修订日期：2014-12-12 |
| 摘要点击次数: 1773 |
| 全文下载次数: 1475 |
| 颜洁,李建,张宝泉,刘秀凤.低轴径比CrCoAPO-5分子筛的合成与表征[J].无机化学学报,2015,31(4):749-754. |
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