Hollow Spheres of Mesoporous Aluminosilicate with a Three-Dimensional Pore Network and Extraordinarily High Hydrothermal Stability

Li, Qing; Shi, Jianrong; Hua, Hua; Chen, Guihai; Ruan,; Yan, Victoria C.

doi:10.1021/nl034134x

Cited by 302 publications

(168 citation statements)

References 27 publications

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“…However, these materials generally exhibit low hydrothermal stability and weak acidity due to their amorphous frameworks [24]. Thus, new synthesis strategies have been developed to obtain materials which combine the advantages of mesoporous materials and zeolites [25][26][27][28][29][30][31][32][33][34]. For instance, Pinnavaia and co-workers [26,27] reported the assembly of steam stable aluminosilicate mesostructures using zeolite seeds such as ZSM-5, Y and Beta as building units or precursors.…”

Section: Introductionmentioning

confidence: 99%

Comprehensive investigation of Pd/ZSM-5/MCM-48 composite catalysts with enhanced activity and stability for benzene oxidation

Peng

et al. 2010

Applied Catalysis B: Environmental

106

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a b s t r a c t ZSM-5/MCM-48 composite materials with various acidities have been successfully assembled on zeolite seeds via a two-step crystallization process. The characterization results reveal that the ZSM-5 seeds are present in the framework of the resulting composite materials with its content gradually increasing with the Si/Al molar ratio, and Al atoms prefer the tetrahedral coordination in composite products. The amount of strong acid sites increases as the Si/Al molar ratio decreases, while that of weak acid sites is almost unchanged. The activity tests demonstrate that the catalytic activity of Pd-loaded ZSM-5/MCM-48 composite catalysts is much higher than that of Pd/ZSM-5 and Pd/MCM-48, and all these catalysts are active and stable in the total oxidation of benzene. Both Pd 0 and Pd 2+ are responsible for the oxidation reaction, and the catalytic activity is closely related to the support acidity, the CO 2 desorption capability and the Pd dispersion. This research thus indicates that the novel composite materials have promised as active Pd-supported catalysts in the elimination of volatile organic compound (VOCs).

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Section: Introductionmentioning

confidence: 99%

Comprehensive investigation of Pd/ZSM-5/MCM-48 composite catalysts with enhanced activity and stability for benzene oxidation

Peng

et al. 2010

Applied Catalysis B: Environmental

106

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“…Since the discovery of mesoporous silica molecular sieves by Beck et al Kresge et al, 1992), mesoporous materials have opened many new possibilities for application in the fields of catalysis (Tanev et al, 1994), separation, and nanoscience (Wu & Bein, 1994;Agger et al, 1998;Li et al, 2003;Yu et al, 2005]. In recent years, fabrication of silica materials with designed structure (e.g.…”

Section: Introductionmentioning

confidence: 99%

Hollow Nano Silica: Synthesis, Characterization and Applications

Venkatathri¹

2012

Smart Nanoparticles Technology

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“…The well-organized pores and hollow morphology can make it suitable for applications in confined nanocatalysts, biosensors, targeted drug and gene delivery, enzyme encapsulation, and nanoreactors. [1][2][3][4][5][6] There have been reports about synthesis of silica hollow spheres by several methods such as sonochemical, 7 solid particle templates, [8][9][10] surfactant/vesicle templates, [11][12][13][14][15][16][17] and emulsion templating technology. 18,19 However, only several reports have occasionally involved the synthesis of hollow spheres with ordered porous wall structures.…”

Section: Introductionmentioning

confidence: 99%

“…18,19 However, only several reports have occasionally involved the synthesis of hollow spheres with ordered porous wall structures. 7,13,18 Moreover, their particle sizes are usually not uniform.…”

Section: Introductionmentioning

confidence: 99%

Surface-Functionalized Periodic Mesoporous Organosilica Hollow Spheres

Qiao¹,

Lin²,

Jin³

et al. 2009

J. Phys. Chem. C

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Surface-functionalized periodic mesoporous organosilica (PMO) hollow spheres are successfully synthesized by using a hybrid silica precursor, 1,2-bis(trimethoxysilyl)ethane (BTME), and five precursors with different functional groups (-SH, -NH 2 , -CN, -CdC, -benzene) as well as surfactants, fluorocarbon and cetyltrimethylammonium bromide, combining a new vesicle and liquid crystal "dual templating" technique. Different disruption effects on the final mesostructure are observed following the order of -SH from 3-mercaptopropyltrimethoxysilane (MPTMS) > -benzene from (trimethoxysilyl)benzene (TMSB) ∼ -CdC from vinyltrimethoxysilane (VTMS) > -NH 2 from 3-aminopropyltriethoxysilane (APTES) > -CN from 3-cyanopropyltriethoxysilane (CPTES). The particle size, cavity size, and wall thickness of these hollow spheres can be adjusted by changing the amount of precursors or surfactants applied. In terms of providing better control over surface properties of products and giving more uniform surface coverage of functional groups, this direct synthesis method may benefit future production of hollow particles by a combination of various bridged organic and terminal functional groups for more versatile applications in catalyst, separation, drug/gene delivery, microelectronics field, etc.

show abstract

Hollow Spheres of Mesoporous Aluminosilicate with a Three-Dimensional Pore Network and Extraordinarily High Hydrothermal Stability

Cited by 302 publications

References 27 publications

Comprehensive investigation of Pd/ZSM-5/MCM-48 composite catalysts with enhanced activity and stability for benzene oxidation

Comprehensive investigation of Pd/ZSM-5/MCM-48 composite catalysts with enhanced activity and stability for benzene oxidation

Hollow Nano Silica: Synthesis, Characterization and Applications

Surface-Functionalized Periodic Mesoporous Organosilica Hollow Spheres

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