Ionothermal Synthesis of AEL-Type Aluminophosphate Molecular Sieve Membrane and Its Formation Mechanism
文献类型：期刊论文
| 作者 | Li Keda1,3; Li Xiaolei1,3; Wang Yasong1,3; Li Dawei1,3; Liu Hao1,3; Xu Renshun1,2; Tian Zhijian1,2 |
| 刊名 | acta chimica sinica
 |
| 出版日期 | 2013-04-15 |
| 卷号 | 71期号:4页码:573-578 |
| 关键词 | ionothermal synthesis aluminophosphate molecular sieve membrane substrate surface conversion formation mechanism |
| 英文摘要 | highly c-oriented ael aluminophosphate molecular sieve membranes were ionothermally synthesized on the surface of delta-alumina substrate by "substrate surface conversion" method. the typical synthesis procedure can be described as follows: a delta-aluminia alumina disc was put into 1-ethyl-3-methyl imidazolium bromide ([emim]br) solution containing reagent quantities of phosphoric acid (h3po4) (85 wt% in water, ar) and hydrofluoric acid (hf) (40 wt% in water, ar). the synthesis was performed at 210 degrees c for certain time. no additional al source is added into the synthesis solution. after the synthesis, the as-synthesized sample was washed thoroughly with distilled water and acetone for several times by ultrasonic vibration and dried at 120 degrees c overnight. x-ray diffraction (xrd) and scanning electron microscopy (sem) were carried out to characterize the products. the synthesis process of ael membrane via "substrate surface conversion" can be divided into two separated steps, which is carried out in the ionic liquid solution of hf and h3po4 in turn. we termed this route as ionothermal two-step method, which making it possible for us to investigate the effect of bf and h3po4, respectively. the formation mechanism of "substrate surface conversion" was therefore demonstrated, with which the delta-alumina substrate acts as both support and al source during the synthesis process. the surface of the substrate is first converted into a gel layer by the solution. the layer is a heterogeneous phase, which contains all nutrients required for the crystallization of molecular sieve membrane, including the aluminophosphate precursor, the mineralizer and the structure directing agent. the transformation from the gel layer into membrane is probably of solid-solid formation mechanism. the whole synthesis process needs the participation of both h3po4 and hf. h3po4 is an essential component of both aluminophosphate precursor and molecular sieve crystal. the crystallinity and the orientation of synthesized membranes can be greatly influenced by adjusting the amount of bf in the initial solution, which may act as both structure directing agent and mineralizer during the synthesis process of molecular sieve membrane. |
| WOS标题词 | science & technology ; physical sciences |
| 类目[WOS] | chemistry, multidisciplinary |
| 研究领域[WOS] | chemistry |
| 关键词[WOS] | zeolite membranes ; microwave ; separation ; conversion |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000318258800015 |
| 公开日期 | 2015-11-10 |
| 源URL | [http://159.226.238.44/handle/321008/137864]  |
| 专题 | 大连化学物理研究所_中国科学院大连化学物理研究所 |
| 作者单位 | 1.Chinese Acad Sci, Dalian Inst Chem Phys, Dalian Natl Lab Clean Energy, Dalian 116023, Liaoning, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Liaoning, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li Keda,Li Xiaolei,Wang Yasong,et al. Ionothermal Synthesis of AEL-Type Aluminophosphate Molecular Sieve Membrane and Its Formation Mechanism[J]. acta chimica sinica,2013,71(4):573-578. |
| APA | Li Keda.,Li Xiaolei.,Wang Yasong.,Li Dawei.,Liu Hao.,...&Tian Zhijian.(2013).Ionothermal Synthesis of AEL-Type Aluminophosphate Molecular Sieve Membrane and Its Formation Mechanism.acta chimica sinica,71(4),573-578. |
| MLA | Li Keda,et al."Ionothermal Synthesis of AEL-Type Aluminophosphate Molecular Sieve Membrane and Its Formation Mechanism".acta chimica sinica 71.4(2013):573-578. |
入库方式： OAI收割
来源：大连化学物理研究所
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