Direct synthesis and characterization of pore-broadened Al-SBA-15

doi:10.1016/j.micromeso.2016.10.018

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	Direct synthesis and characterization of pore-broadened Al-SBA-15
	Xing, Shiyou 1,2,3,4; Lv, Pengmei1,2,4,5 ; Fu, Junying 1,2,4; Wang, Jiayan 1,6; Fan, Pei 1,2,3,4; Yang, Lingmei1,2,4 ; Yuan, Zhenhong1,2,4,5
刊名	MICROPOROUS AND MESOPOROUS MATERIALS
	2017-02-01
卷号	239 页码:316-327
关键词	Pore-broadening Al-sba-15 Direct Synthesis Characterization
DOI	10.1016/j.micromeso.2016.10.018
文献子类	Article
英文摘要	A series of pore-broadened Al-SBA-15 samples were synthesized using a direct hydrothermal method. The effects of aluminum incorporation, assembling temperature, and co-solvent (1,3,5-trimethylbenzene (TMB)) content were investigated by low-angle XRD, N-2 adsorption and desorption isotherm analysis, SEM, TEM, NH3-TPD, FTIR, pyridine-IR, and Al-27 NMR. The results indicated that aluminum incorporation (Si/Al ratio = 10) increased the pore size of SBA-15 from 5.66 to 10.13 nm. A small pore size of 6.55 nm was observed at a low assembling temperature of 30 degrees C, attributing to the inadequate stretching of the molecular template. An increased pore size of 8.45 nm was obtained at an assembling temperature of 60 degrees C because of the partial hydrophobization of the hydrophilic groups, whereas a high temperature of 70 degrees C resulted in the generation of least ordered pores. The hydrophobic co-solvent TMB showed a significant broadening level as a result of its effective fusion into the hydrophobic micelle cores. A highly ordered pore framework with a pore size of 18 nm was obtained at a TMB/P-123 ratio of 0.25, which was found to be optimum. More or less TMB led to the generation of mesocellular silica-aluminum foams with a complete loss of regularity. The Al-27 NMR results showed that aluminum was mostly tetrahedrally coordinated. The NH3-TPD and pyridine-IR detection results indicated that a number of weak and medium acid sites (as Bronsted and Lewis acid sites) existed in Al-SBA-15 pore-broadened by TMB. (C) 2016 Elsevier Inc. All rights reserved.
WOS关键词	MESOPOROUS SILICA ; HYDROTHERMAL STABILITY ; PT/AL-SBA-15 CATALYSTS ; ACIDIC PROPERTIES ; PHASE-TRANSITION ; MOLECULAR-SIEVES ; SI/AL RATIO ; GAS OIL ; SBA-15 ; MCM-41
语种	英语
WOS记录号	WOS:000389284300036
资助机构	National Natural Science Foundation of China(21576260) ; Natural Science Foundation of Guangdong Province(2016A030308004 ; Special Funds of Applied Science and Technology Research of Guangdong Province(2015B020241002) ; 2015A030313720)
内容类型	期刊论文
源URL	[http://ir.giec.ac.cn/handle/344007/13988]
专题	中国科学院广州能源研究所
作者单位	1.Chinese Acad Sci, Guangzhou Inst Energy Convers, Guangzhou 510640, Guangdong, Peoples R China 2.Chinese Acad Sci, Key Lab Renewable Energy, Guangzhou 510640, Guangdong, Peoples R China 3.Univ Chinese Acad Sci, Beijing 100049, Peoples R China 4.Guangdong Key Lab New & Renewable Energy Res & De, Guangzhou 510640, Guangdong, Peoples R China 5.Collaborat Innovat Ctr Biomass Energy, Zhengzhou 450002, Henan Province, Peoples R China 6.Univ Sci & Technol China, Nano Sci & Technol Inst, Suzhou 215123, Peoples R China
推荐引用方式 GB/T 7714	Xing, Shiyou,Lv, Pengmei,Fu, Junying,et al. Direct synthesis and characterization of pore-broadened Al-SBA-15[J]. MICROPOROUS AND MESOPOROUS MATERIALS,2017,239:316-327.
APA	Xing, Shiyou.,Lv, Pengmei.,Fu, Junying.,Wang, Jiayan.,Fan, Pei.,...&Yuan, Zhenhong.(2017).Direct synthesis and characterization of pore-broadened Al-SBA-15.MICROPOROUS AND MESOPOROUS MATERIALS,239,316-327.
MLA	Xing, Shiyou,et al."Direct synthesis and characterization of pore-broadened Al-SBA-15".MICROPOROUS AND MESOPOROUS MATERIALS 239(2017):316-327.