Plug precursor assisted synthesis: A highly efficient method of tuning the acidic and structural properties of Al-SBA-15
文献类型：期刊论文
| 作者 | Lin, Sen1; Shi, Lei2; Yu, Tingting2; Li, Xuebing1; Yi, Xianfeng3; Zheng, Anmin3 |
| 刊名 | MICROPOROUS AND MESOPOROUS MATERIALS
 |
| 出版日期 | 2015-05-01 |
| 卷号 | 207页码:111-119 |
| 关键词 | Al-SBA-15 Acid-free hydrothermal synthesis Plug precursor assisted synthesis Structural characterization Acidity |
| 英文摘要 | An acid-free strategy shows high flexibility for tuning the structural properties of Al-SBA-15 mesoporous materials. Full-open-, plug-containing- and inkbottle-type mesostructures have been directly hydrothermally synthesized by simply adjusting the P123/Si molar ratio of the initial reaction mixture from 0.015 to 0.0020. When attaching a plug precursor addition process (denoted as Plug Precursor Assisted Synthesis, PPAS), the plug structure can be controllably generated inside the straight mesopores of the resulting Al-SBA-15. The plug-containing Al-SBA-15 sample showed that more than 43% of the mesopores were blocked by the plug structures, even with a P123/Si molar ratio condition of as high as 0.0075. More importantly, it exhibited stronger acid strength than an Al-SBA-15 sample possessing full-open-type mesopores, and was characterized by the strongest acidity with a pH value of around 2. The strong acid strength was due to aluminum migration and rearrangement, as well as to structural reconstruction during the hydrothermal treatment to form plugs, which also accelerated the generation of more tetrahedral-coordinated Al species with high accessibility. In contrast, a plug-containing Al-SBA-15 sample synthesized from an HCl aqueous medium has a relatively lower aluminum content and a weaker acid strength, although the pH value was measured to be ca. 2. To account for this result, negatively charged silica fragments are suggested to have been previously neutralized by H+ so that further interaction with Al3+ was suppressed. Therefore, the inclusion of aluminum into framework reconstruction in the subsequent hydrothermal treatment under an H+-rich synthesis condition was inhibited. (C) 2015 Elsevier Inc. All rights reserved. |
| WOS标题词 | Science & Technology ; Physical Sciences ; Technology |
| 类目[WOS] | Chemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary |
| 研究领域[WOS] | Chemistry ; Science & Technology - Other Topics ; Materials Science |
| 关键词[WOS] | HEXAGONAL TEMPLATED SILICA ; ORDERED MESOPOROUS MATERIALS ; NONIONIC TRIBLOCK ; PORE STRUCTURE ; ONE-POT ; SBA-15 ; ADSORPTION ; COPOLYMER ; MICROPOROSITY ; POSTTREATMENT |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000350518600016 |
| 公开日期 | 2015-07-14 |
| 源URL | [http://ir.wipm.ac.cn/handle/112942/1047]  |
| 专题 | 武汉物理与数学研究所_磁共振应用研究部 |
| 作者单位 | 1.Chinese Acad Sci, Qingdao Inst Bioenergy & Bioproc Technol, Key Lab Biofuels, Qingdao 266101, Peoples R China 2.Qilu Univ Technol, Shandong Prov Key Lab Fine Chem, Jinan 250353, Peoples R China 3.Chinese Acad Sci, Wuhan Inst Phys & Math, Wuhan 430071, Peoples R China |
| 推荐引用方式 GB/T 7714 | Lin, Sen,Shi, Lei,Yu, Tingting,et al. Plug precursor assisted synthesis: A highly efficient method of tuning the acidic and structural properties of Al-SBA-15[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2015,207:111-119. |
| APA | Lin, Sen,Shi, Lei,Yu, Tingting,Li, Xuebing,Yi, Xianfeng,&Zheng, Anmin.(2015).Plug precursor assisted synthesis: A highly efficient method of tuning the acidic and structural properties of Al-SBA-15.MICROPOROUS AND MESOPOROUS MATERIALS,207,111-119. |
| MLA | Lin, Sen,et al."Plug precursor assisted synthesis: A highly efficient method of tuning the acidic and structural properties of Al-SBA-15".MICROPOROUS AND MESOPOROUS MATERIALS 207(2015):111-119. |
入库方式： OAI收割
来源：武汉物理与数学研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。