Effect of heteroatom doping on surface acidity and hydrophilicity of Al, Ti, Zr-doped mesoporous SBA-15

Szczodrowski, Karol; Prelot, Bénédicte; Lantenois, Sébastien; Douillard, Jean-Marc; Zając, Jerzy

doi:10.1016/j.micromeso.2009.04.035

Cited by 50 publications

(34 citation statements)

References 42 publications

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“…Nevertheless, only a few research endeavors have been focused on investigations dealing with the effect of the zirconium precursor on the properties (textural, acid, and/or catalytic) of Zr-SBA-15 systems. [19] A majority of the reports to date have randomly used zirconyl chloride [18][19][20][21][22][23] (ZrOCl 2 ·8 H 2 O) and zirconyl nitrate [24] [ZrO(NO 3 ) 2 ·xH 2 O], zirconium propoxide in propanol [19,25] [Zr(OPr) 4 ], or zirconium nitrate [26] [Zr(NO 3 ) 4 ·3 H 2 O] as metal sources. Interestingly, the choice of the metal precursor has subsequently been reported to exert a dramatic influence on the efficiency of its incorporation and on the accessibility of the final supported zirconium species.…”

Section: Introductionmentioning

confidence: 99%

Maximizing the Accessibility of Active Species in Weakly Acidic Zr‐SBA‐15 Materials

et al. 2012

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Weakly acidic Zr‐SBA‐15 materials were synthesized by using a novel method to maximize the accessibility of zirconium sites in view of their catalytic applications. Synthesized materials at different ageing temperatures were characterized by means of several techniques such as XRD, N2 physisorption, TEM, ammonia temperature‐programmed desorption, and X‐ray photoelectron spectroscopy and subsequently used in a test acid‐catalyzed process such as the microwave‐assisted alkylation of anisole with benzyl chloride. Reaction results revealed the very high catalytic activity of the prepared Zr‐SBA‐15 materials, which depended mostly on the accessibility of the supported zirconium species and their speciation.

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Section: Introductionmentioning

confidence: 99%

Maximizing the Accessibility of Active Species in Weakly Acidic Zr‐SBA‐15 Materials

et al. 2012

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“…Such skills were previously discussed for the incorporation of Al 76, 77, and transition metals 78. These authors still point out that the incorporation of these metals is important for the formation of active sites due to the isomorphic substitutions of atoms of silicon by electropositive metals in tetrahedral structures, accompanied by negative charge effects generating Bronsted′s basicity.…”

Section: Resultsmentioning

confidence: 94%

Electrode Based on Nickel‐containing SBA‐15 for the Determination of Copper in Ethanol Biofuel

et al. 2015

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A sensor based in a graphite–polyurethane composite electrode modified with the mesoporous nanostructured silica with hexagonal array of pores called Santa Barbara Amorphous type material (SBA‐15) containing nickel was built. The presence of Ni, incorporated during the synthesis of SBA‐15, resulted in an increase in sensitivity when compared to the other electrodes based on the unmodified SBA‐15. A procedure was proposed for the determination of Cu2+ in ethanol biofuel by square wave stripping voltammetry with linear response in concentration levels of 1.0×10−8 and 1.0×10−7 mol L−1, resulting in a limit of detection of 1.83×10−10 mol L−1 and precision (RSD) of 2.09 %.

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“…The formation of cyclic (12,14,16,19,20,21) and aromatic compounds (15,22) in Zone B is likely due to charring reactions promoted by the acidic sites of SBA-15-L [27]. Intimate contact due to the interaction between the polymer molecules and acidic sites is essential for the progression of these charring processes [28].…”

Section: Identification Of Thermal Degradation Products and Possible mentioning

confidence: 99%

Structure−property relationships of polypropylene-based nanocomposites obtained by dispersing mesoporous silica into hydroxyl-functionalized polypropylene. Part 2: Matrix−filler interactions and pore filling of mesoporous silica characterized by evolved gas analysis

Watanabe

Hagihara

Sato

2018

Polym J

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Nanocomposites containing mesoporous silica (MPS) materials with various pore structures (SBA-15 and MCM-41 types) melt mixed into polypropylene (PP) or PP functionalized with hydroxyl groups (PPOH) were characterized by analytical pyrolysis techniques, such as evolved gas analysis (EGA)-mass spectrometry (MS) and heart-cut EGA-gas chromatography (GC)/MS, to evaluate the interactions between the polymer matrix and MPS and the pore filling of the MPS in the nanocomposite. The EGA-MS measurements revealed that nanocomposites with MPSs evolve specific degradation products, which can be attributed to strong interactions between the polymer molecules and the internal pores. The amount of these specific products increased upon increasing the pore size of the MPS and the hydroxyl content in the polymer matrix. Sufficiently large pores of MPS and high hydroxyl contents in the matrix appear to provide strong interactions because the MPS pores are well-filled with polymer molecules, which contributes to the improved physical properties of the nanocomposites.

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Effect of heteroatom doping on surface acidity and hydrophilicity of Al, Ti, Zr-doped mesoporous SBA-15

Cited by 50 publications

References 42 publications

Maximizing the Accessibility of Active Species in Weakly Acidic Zr‐SBA‐15 Materials

Maximizing the Accessibility of Active Species in Weakly Acidic Zr‐SBA‐15 Materials

Electrode Based on Nickel‐containing SBA‐15 for the Determination of Copper in Ethanol Biofuel

Structure−property relationships of polypropylene-based nanocomposites obtained by dispersing mesoporous silica into hydroxyl-functionalized polypropylene. Part 2: Matrix−filler interactions and pore filling of mesoporous silica characterized by evolved gas analysis

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