Catalytic Characterization of Mesoporous Ti–Silica Hollow Spheres

Bača, Martin; Li, W. J.; Du, Peng; Mul, Guido; Moulijn, Jacob A.; Coppens, Marc‐Olivier

doi:10.1007/s10562-006-0079-x

Cited by 16 publications

(9 citation statements)

References 32 publications

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“…Evidence of such Ti-O-Ti oligomers was found during diffuse reflectance UV-Vis experiments, with the presence of a weak shoulder at 270 nm [82,83] ( Fig. 2-bottom left).…”

Section: Determining the Factors That Affect Catalytic Activitymentioning

confidence: 76%

Optimization of mesoporous titanosilicate catalysts for cyclohexene epoxidation via statistically guided synthesis

et al. 2018

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An efficient approach to improve the catalytic activity of titanosilicates is introduced. The Doehlert matrix (DM) statistical model was utilized to probe the synthetic parameters of mesoporous titanosilicate microspheres (MTSM), in order to increase their catalytic activity with a minimal number of experiments. Synthesis optimization was carried out by varying two parameters simultaneously: homogenizing temperature and surfactant weight. Thirteen different MTSM samples were synthesized in two sequential 'matrices' according to Doehlert conditions and were used to catalyse the epoxidation of cyclohexene with tert-butyl hydroperoxide. The samples (and the corresponding synthesis conditions) with superior catalytic activity in terms of product yield and selectivity were identified. In addition, this approach revealed the limiting values of each synthesis parameter, beyond which the material becomes catalytically ineffective. This study demonstrates that the DM approach can be broadly used as a powerful and time-efficient tool for investigating the optimal synthesis conditions of heterogeneous catalysts. Abbreviation

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“…Evidence of such Ti-O-Ti oligomers was found during diffuse reflectance UV-Vis experiments, with the presence of a weak shoulder at 270 nm [82,83] ( Fig. 2-bottom left).…”

Section: Determining the Factors That Affect Catalytic Activitymentioning

confidence: 76%

Optimization of mesoporous titanosilicate catalysts for cyclohexene epoxidation via statistically guided synthesis

et al. 2018

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“…Due to the larger volume of Ti(O i Pr) 4 , this change was more obvious for sample c. In addition, the diffraction peak corresponding to the bulk TiO 2 (2h = 25.5) in the high degree region does not appear for both treated MCM-48 samples (not shown here) and their UV-visible spectra (see the supporting material, Fig. 1) also do not have the characteristic peaks of bulk TiO 2 [14]. Both of these suggested that the hydrolyzation of Ti-source happens rarely during the incorporation process.…”

Section: Resultsmentioning

confidence: 86%

The epoxidation of allyl alcohol on Ti-complex/MCM-48 catalyst

Zhao

Zhang

et al. 2008

Microporous and Mesoporous Materials

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“…The production of a stable solution of aqueous hollow silica spheres suggests applications of these materials in catalysis [25,60], coating technology, transport and controlled release of drug compounds [23]. Techniques to improve the stability of the silica hollow spheres were investigated for the system of CPB/SPFO templated silica spheres, which are less stable than the HFDPC/ SPFO system using the acid-catalyzed synthesis procedure described in Section 3.7.…”

Section: Stable Silica Hollow Spheres In Cpb/spfomentioning

confidence: 99%