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Efficient assembly of hierarchical NaY aggregates by using an organosilane modified SDA

文献类型：期刊论文

;
作者Zhao, XM; Meng, XL; Shang, YS; Song, Y; Liu, RG; Wei, JH; Gong, YJ; Li, ZH; Li ZH(李志宏)
刊名MICROPOROUS AND MESOPOROUS MATERIALS ; MICROPOROUS AND MESOPOROUS MATERIALS
出版日期2018 ; 2018
卷号264页码:92-103
关键词Hierarchical NaY aggregates Hierarchical NaY aggregates Modified aluminosilicate sol Organosilane Sol structure SAXS Dense aqueous system Modified aluminosilicate sol Organosilane Sol structure SAXS Dense aqueous system
ISSN号1387-1811 ; 1387-1811
DOI10.1016/j.micromeso.2018.01.009 ; 10.1016/j.micromeso.2018.01.009
文献子类Article ; Article
英文摘要We demonstrate an efficient method for the assembly of hierarchical NaY aggregates by using a modified structure-directing agent (SDA) in an extremely dense aqueous system at 373K. By introducing the dimethylhexadecyl[3-(trimethoxysilyl)propyl] ammonium chloride (TPHAC) into the aluminosilicate sol, an organo-modified sol was formed and after ageing it was used as SDA in the feedstock gel to generate the well aligned hierarchical NaY aggregates. The structure evolution of sol and formation of NaY aggregates were systematically investigated by FT-IR, XRD, SEM, TEM and synchrotron radiation small angel X-ray scattering (SR-SAXS), which confirmed the dominant impact of the organosilane on the aluminosilicate species and further on the outcome of the NaY aggregates. The results show that by adding the minimal amount of TPHAC in the sol, the sol promotes long period structure, forming a large amount of aluminosilicate species with suitable size and distribution, which are responsible for tuning the morphology and properties of NaY aggregates under the dense synthetic system. The typical NaY aggregate has high SiO2/Al2O3 of 5.3, consisting of particles (2-4 mu m) orderly assembled from 20 to 80 nm crystalline domains of NaY zeolites with high pore volume of 0.43 cm(3)/g and external surface area of 100 m(2)/g. The morphology, crystal sizes, mesopore sizes, volume ratios of mesopore/micropore of NaY aggregate can be adjusted by varying the amount of TPHAC, the reaction time and solid content in the dense system. The new insight into regulating sol species structure by TPHAC and forming NaY crystal aggregates were discussed.; We demonstrate an efficient method for the assembly of hierarchical NaY aggregates by using a modified structure-directing agent (SDA) in an extremely dense aqueous system at 373K. By introducing the dimethylhexadecyl[3-(trimethoxysilyl)propyl] ammonium chloride (TPHAC) into the aluminosilicate sol, an organo-modified sol was formed and after ageing it was used as SDA in the feedstock gel to generate the well aligned hierarchical NaY aggregates. The structure evolution of sol and formation of NaY aggregates were systematically investigated by FT-IR, XRD, SEM, TEM and synchrotron radiation small angel X-ray scattering (SR-SAXS), which confirmed the dominant impact of the organosilane on the aluminosilicate species and further on the outcome of the NaY aggregates. The results show that by adding the minimal amount of TPHAC in the sol, the sol promotes long period structure, forming a large amount of aluminosilicate species with suitable size and distribution, which are responsible for tuning the morphology and properties of NaY aggregates under the dense synthetic system. The typical NaY aggregate has high SiO2/Al2O3 of 5.3, consisting of particles (2-4 mu m) orderly assembled from 20 to 80 nm crystalline domains of NaY zeolites with high pore volume of 0.43 cm(3)/g and external surface area of 100 m(2)/g. The morphology, crystal sizes, mesopore sizes, volume ratios of mesopore/micropore of NaY aggregate can be adjusted by varying the amount of TPHAC, the reaction time and solid content in the dense system. The new insight into regulating sol species structure by TPHAC and forming NaY crystal aggregates were discussed.
电子版国际标准刊号1873-3093 ; 1873-3093
WOS关键词MESOPOROUS ZEOLITE-Y ; MESOPOROUS ZEOLITE-Y ; FAU-TYPE ZEOLITE ; FLUID CATALYTIC CRACKING ; AMPHIPHILIC ORGANOSILANE ; ELECTRON-MICROSCOPY ; PERFORMANCE ; NANOCRYSTALS ; NANOSHEETS ; SURFACTANT ; SIZE ; FAU-TYPE ZEOLITE ; FLUID CATALYTIC CRACKING ; AMPHIPHILIC ORGANOSILANE ; ELECTRON-MICROSCOPY ; PERFORMANCE ; NANOCRYSTALS ; NANOSHEETS ; SURFACTANT ; SIZE
WOS研究方向Chemistry ; Chemistry ; Science & Technology - Other Topics ; Materials Science ; Science & Technology - Other Topics ; Materials Science
语种英语 ; 英语
WOS记录号WOS:000430900000013 ; WOS:000430900000013
源URL[http://ir.ihep.ac.cn/handle/311005/285870]  
专题高能物理研究所_多学科研究中心
通讯作者Li ZH(李志宏)
作者单位中国科学院高能物理研究所
推荐引用方式
GB/T 7714		 Zhao, XM,Meng, XL,Shang, YS,et al. Efficient assembly of hierarchical NaY aggregates by using an organosilane modified SDA, Efficient assembly of hierarchical NaY aggregates by using an organosilane modified SDA[J]. MICROPOROUS AND MESOPOROUS MATERIALS, MICROPOROUS AND MESOPOROUS MATERIALS,2018, 2018,264, 264:92-103, 92-103.
APA Zhao, XM.,Meng, XL.,Shang, YS.,Song, Y.,Liu, RG.,...&李志宏.(2018).Efficient assembly of hierarchical NaY aggregates by using an organosilane modified SDA.MICROPOROUS AND MESOPOROUS MATERIALS,264,92-103.
MLA Zhao, XM,et al."Efficient assembly of hierarchical NaY aggregates by using an organosilane modified SDA".MICROPOROUS AND MESOPOROUS MATERIALS 264(2018):92-103.

入库方式： OAI收割

来源：高能物理研究所

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