| "一步法"合成多级孔SAPO-34分子筛 |
| One Step Synthesis of SAPO-34 Molecular with Hierarchical Porosity |
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| 摘要: 以TPOAC和硅溶胶为硅源,合成了多级孔SAPO-34分子筛,总比表面积达到649 m2·g-1。详细考察了TPOAC和硅溶胶的配比对多级孔SAPO-34外比表面的影响,通过XRD、BET、SEM、NH3-TPD等对其结构进行表征,结果表明多级孔SAPO-34的外比表面积可调变,晶体外观有较多缺陷位置,弱酸量减少,强酸位有变弱的趋势。在TPOAC与硅溶胶的投料比为3:2,晶化时间为10 d,投料比为nAl2O3:nP2O5:nSi:nTEAOH:nH2O=1:0.9:0.5:2:60时,合成的多级孔SAPO-34的外比表面积达到最大,为100 m2·g-1。 |
| 关键词: 中孔SAPO-34 硅烷偶联剂 合成 |
| 基金项目: 国家自然科学基金项目(No.21371129,21376157,21246003)和中国石油化工股份有限公司(No.111110)项目资助。 |
| Abstract: Meso-SAPO-34 molecular sieve was synthesized with TPOAC and colloidal silica as the silica source, the total surface area is up to 649 m2·g-1. The ratio of TPOAC and silica sol was investigated, which affects external surface area of SAPO-34. The structure was determined by XRD, BET, SEM, NH3-TPD, results show that mesoporous SAPO-34 external surface area can be adjusted, more the defect position crystal appearance, reduce the amount of strong acid weak acid, a weak trend.Under the condition of the ration of TPOAC and silica sol was 3:2, reaction time was 10 days and the ratio of nAl2O3:nP2O5:nSi:nTEAOH:nH2O=1:0.9:0.5:2:60, the external surface area of synthetic mesoporous SAPO-34 reaches the maximum, the value is 100 m2·g-1. |
| Keywords: mesoporous SAPO-34 silane coupling agent synthesis |
| 投稿时间：2014-12-10 修订日期：2015-06-10 |
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| 白亚东,郑家军,范彬彬."一步法"合成多级孔SAPO-34分子筛[J].无机化学学报,2015,31(8):1505-1510. |
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