Plug precursor assisted synthesis: A highly efficient method of tuning the acidic and structural properties of Al-SBA-15

doi:10.1016/j.micromeso.2015.01.007

QIBEBT-IR > 多相催化转化研究组

	Plug precursor assisted synthesis: A highly efficient method of tuning the acidic and structural properties of Al-SBA-15
	Lin, Sen 1; Shi, Lei 2; Yu, Tingting 2; Li, Xuebing1 ; Yi, Xianfeng 3; Zheng, Anmin 3
	2015-05-01
发表期刊	MICROPOROUS AND MESOPOROUS MATERIALS
卷号	207 页码:111-119
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.
文章类型	Article
关键词	Al-sba-15 Acid-free Hydrothermal Synthesis Plug Precursor Assisted Synthesis Structural Characterization Acidity
WOS标题词	Science & Technology ; Physical Sciences ; Technology
DOI	10.1016/j.micromeso.2015.01.007
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研究方向	Chemistry ; Science & Technology - Other Topics ; Materials Science
WOS类目	Chemistry, Applied ; Chemistry, Physical ; Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
WOS记录号	WOS:000350518600016
引用统计
文献类型	期刊论文
条目标识符	http://ir.qibebt.ac.cn/handle/337004/6404
专题	多相催化转化研究组
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.